Section 890.120 Definitions

Section 890

Section 890.120  Definitions

For the purpose of administering

and enforcing this Part, the following terms, which consist of words or

expressions that have a precise meaning in plumbing, shall have the meaning

indicated.  Refer to Appendix A for standards applicable to plumbing

appurtenances and fixtures defined in this Section.

"Abut" or "Abutting":   To border, to

touch, to terminate at point of contact, adjacent.

"Accessible":  Easily approached or entered with

minor modifications, such as the removal of an access panel, door or similar

obstruction (e.g., drywall, gypsum board, plasterboard, or paneling).  Concrete,

asphalt and ceramic tile are not considered accessible.

"Air Break" (See "Air Gap".)

"Air Gap":  The unobstructed vertical distance

through the free atmosphere between the lowest opening from any pipe or faucet

supplying water to a tank or plumbing fixture and the flood-level rim of the

receptacle.  An air gap in a drainage system is a piping arrangement in which a

drain from a fixture, appliance or device discharges indirectly into another

fixture, receptacle or interceptor at a point above the flood level rim.  (See

Appendix B.Illustrations A and B.)

"Anchor":  An approved support for securing pipe,

fixtures and equipment to walls, ceilings, floors or any other structural

members.

"Antimicrobial":  An additive or surface coating

that prohibits the growth of bacteria or staphylococci.

"Anti-siphon Ballcock":  A device consisting of a

float valve with a flow-splitter to provide for tank and trap refill that has

an integral vacuum breaker and that is used in conjunction with water closet

flush tanks.

"Approved":  Accepted or acceptable under an

applicable specification stated or cited in this Part or accepted as suitable

for the proposed use.

"Area Drain":  A drain placed in the floor of a

basement areaway, a depressed or basement entry way, a loading platform, or a

paved driveway that cannot otherwise be drained

acuum breaker and that is used in conjunction with water closet

flush tanks.

"Approved":  Accepted or acceptable under an

applicable specification stated or cited in this Part or accepted as suitable

for the proposed use.

"Area Drain":  A drain placed in the floor of a

basement areaway, a depressed or basement entry way, a loading platform, or a

paved driveway that cannot otherwise be drained.

"Aspirator":  A device supplied with water under

positive pressure that passes through an integral orifice, causing a partial

vacuum and resulting in movement of fluid by siphonage.

"Atmospheric Vacuum Breaker":  A device consisting

of a soft disc, reaction cup, fully guided stem guide, air vent port, and air

port shield or hood to prevent fouling of the vent port, used for protection

against back siphonage.

"Authorities Having Jurisdiction":  Any entity that

the Illinois Plumbing License Law authorizes to enforce the Law.

"Back Pressure":  A condition caused when a force

is exerted and reverses the flow of gas, water or air in a direction opposite

the intended normal direction of flow.

"Back Siphonage":  A condition caused when a

negative force or vacuum is exerted and reverses the flow of gas, water or air

to a direction opposite the intended normal direction of flow.

"Back Siphonage Preventer":  A device designed to

prevent reverse flow in a water system, specifically back siphonage.  The

device should be used only where no back pressure may occur.

"Back Water Valve":  A device or valve that is

installed in a sanitary sewer, storm drain or storm sewer to prevent sewage or

drainage from backing up.

"Backflow":  The reversal of flow from that

normally intended.  Hydraulic conditions that cause backflow include back

siphonage, back pressure and aspiration.

"Backflow Preventer":  A device or an assembly used

to prevent contamination of the potable water supply through an actual or

potential cross-connection

ry sewer, storm drain or storm sewer to prevent sewage or

drainage from backing up.

"Backflow":  The reversal of flow from that

normally intended.  Hydraulic conditions that cause backflow include back

siphonage, back pressure and aspiration.

"Backflow Preventer":  A device or an assembly used

to prevent contamination of the potable water supply through an actual or

potential cross-connection.

"Backflow Preventer, Double Check Valve Backflow

Preventer Assembly" or "DCV": A plumbing appurtenance consisting

of two internally force loaded, independently acting check valves that operate

normally in the closed position; two tight-closing, resilient seated shut-off

valves; and four test cocks.

"Backflow Preventer, Dual Check Valve Type with Atmospheric

Vent":  A plumbing appurtenance consisting of two internally force loaded,

independently acting check valves, designed to operate normally in the closed

position, separated by an intermediate chamber able to automatically vent to

atmosphere.

"Backflow Preventer, Double Check Detector Backflow

Prevention Assembly" or "DCDA":  A plumbing appurtenance

consisting of two internally force loaded, independently acting check valves,

designed to operate normally in the closed position; two tight-closing,

resilient seated shut-off valves; and four test cocks.  The assembly must

include a bypass line with a water meter and double check assembly.

"Backflow Preventer, Dual Check Valve Type":  A

plumbing appurtenance consisting of two internally force loaded, independently

acting check valves, designed to operate normally in the closed position.

"Backflow Preventer, Dual Check Valves, Post-Mix

Carbonated Beverage Dispenser Type": A plumbing appurtenance used to

prevent carbonated water or carbon dioxide from backflow into a potable water

system.  The assembly consists of two internally force loaded, independently

acting check valves, designed to operate normally in the closed position,

residing in a common body

n the closed position.

"Backflow Preventer, Dual Check Valves, Post-Mix

Carbonated Beverage Dispenser Type": A plumbing appurtenance used to

prevent carbonated water or carbon dioxide from backflow into a potable water

system.  The assembly consists of two internally force loaded, independently

acting check valves, designed to operate normally in the closed position,

residing in a common body.

"Backflow Preventer, Reduced Pressure Detector Backflow

Prevention Assembly" or "RPDA":  A plumbing appurtenance

consisting of two internally force loaded, independently acting check valves,

designed to operate normally in the closed position, separated by an

intermediate zone that includes an internally force loaded hydraulic operated

relief for venting to atmosphere, designed to operate normally in the open

position, two tight-closing, resilient seated shut-off valves, four test cocks,

and a metered reduced pressure backflow prevention assembly bypass.

"Backflow Preventer, Reduced Pressure Principle Backflow

Prevention Assembly" or "RPZ": A plumbing appurtenance

consisting of two internally force loaded, independently acting check valves,

designed to operate normally in the closed position, separated by an

intermediate zone that includes an internally force loaded, hydraulically

operated relief for venting to atmosphere, designed to operate normally in the

open position, two tight-closing resilient shut-off valves, and four test

cocks.

"Ballcock":  A device consisting of a float valve

equipped with a flow-splitter to provide a tank and trap refill; used in

conjunction with a flush tank on a water closet.

"Battery of Fixtures":  Any group of two or more identical

adjacent fixtures that discharge into a common horizontal waste or soil

branch.  (See Appendix B.Illustration C.)

"Boiler Blow-Down":  A controlled outlet on a

boiler to permit emptying or discharging of sediment.

"Branch":  Any part of the piping system other than

a main, riser or stack

conjunction with a flush tank on a water closet.

"Battery of Fixtures":  Any group of two or more identical

adjacent fixtures that discharge into a common horizontal waste or soil

branch.  (See Appendix B.Illustration C.)

"Boiler Blow-Down":  A controlled outlet on a

boiler to permit emptying or discharging of sediment.

"Branch":  Any part of the piping system other than

a main, riser or stack.  (See Appendix B.Illustration D.)

"Branch Interval":  A length of soil or waste stack

corresponding in general to a story height, but in no case less than 8 feet,

within which the horizontal branches from one floor or story of a building are

connected to the stack.

"Branch Vent":  A horizontal vent connecting one or

more individual vents with a vent stack or stack vent.  (See Appendix B.Illustration

E.)

"Building Classification":  The Department's

designation of buildings into differing types based upon use or occupancy, such

as residential buildings, dormitories, office buildings, food service

establishments, etc.

"Building Drain":  The part of the lowest

horizontal piping of a drainage system that receives the discharge from soil,

waste, and other drainage pipes inside the walls of the building and conveys it

to the building (house) sewer.  The building drain's developed length

terminates 5 feet outside the building foundation wall.  (See Appendix B.Illustration

F.)

"Building Sewer":  The part of the horizontal

piping of a drainage system that extends from the end of the building drain,

receives the discharge of the building drain and conveys it to a public

sanitary sewer or private sewage disposal system.  The building sewer commences

5 feet outside the building foundation wall

feet outside the building foundation wall.  (See Appendix B.Illustration

F.)

"Building Sewer":  The part of the horizontal

piping of a drainage system that extends from the end of the building drain,

receives the discharge of the building drain and conveys it to a public

sanitary sewer or private sewage disposal system.  The building sewer commences

5 feet outside the building foundation wall. (See Appendix B.Illustration F.)

"Building Storm Drain":  The lowest horizontal

portion of the storm drainage system used for conveying rain water, surface

water, ground water, subsurface water, site drainage, condensate or cooling

water inside the walls of a building to a point 5 feet beyond the outside of

the building foundation wall.

"Building Sub-drain":  The portion of a sanitary

drainage system (see definition of "Drainage System") that cannot

drain by gravity into the building drain.  (See Appendix B.Illustration G.)

"Building Trap":  A device, fitting, or assembly of

fittings installed in a building drain to prevent circulation of air between

the drainage system of the building and the building sewer.

"Chemical Waste System":  Piping that conveys

corrosive or toxic chemical waste to the drainage system.

"Circuit Vent":  A branch vent that serves two or

more traps and extends from the front of the last fixture connection of a

horizontal waste branch to the vent stack.  This type of venting applies only

to floor drains and floor outlet fixtures.  (See Appendix B.Illustration H.)

"Clear Water" or "Clear Water Waste":

Cooling water and condensate waste from refrigeration or air conditioning

equipment, cooled condensate from steam heating systems, and seepage water.

"Closed Water System":  A system that has a

backflow device or assembly installed in the water supply system to contain

backflow within the premises.  Other plumbing appurtenances, such as a single

check valve or a water pressure regulator installed in the water supply system,

may also create a closed water system

ing

equipment, cooled condensate from steam heating systems, and seepage water.

"Closed Water System":  A system that has a

backflow device or assembly installed in the water supply system to contain

backflow within the premises.  Other plumbing appurtenances, such as a single

check valve or a water pressure regulator installed in the water supply system,

may also create a closed water system.

"Code":  State or local statutes, ordinances, or

administrative rules, e.g., requirements for plumbing methods, materials, etc.

This Part)will be referenced in this rule as "Part".  At the local

level, a county, city, township, village or sanitary/water district shall adopt

a plumbing ordinance or resolution and plumbing rules, and the ordinance or

resolution and rule shall be filed with the clerk's office.  A standard for

plumbing contained in any local rule or ordinance that has not been officially

adopted can be construed only as a recommended standard.

"Cold Water":  Water below 85 degrees Fahrenheit.

"Combination Fixture":  A fixture combining two or more

compartments or receptors.

"Combination Waste and Vent System":  A system of

waste piping with the horizontal wet venting of one or more floor drains by

means of a common waste and vent pipe adequately sized to provide free movement

of air above the flow line of the drain.

"Combined Building Sewer":  A sewer that receives

storm water and sewage.

"Common Vent":  A vent connecting at the junction

of two fixture drains and serving as a vent for both fixtures.  (See Appendix B.Illustration

I.)

"Connection":  The joining of two pieces of pipe,

or pipes and fittings, valves or other appurtenances.

"Contaminant":  Any solid, liquid or gaseous matter

that, when present in a potable water supply distribution system, may cause the

water to degrade so that water quality standards are not met or physical

illness, injury or death to persons consuming the water could result

.Illustration

I.)

"Connection":  The joining of two pieces of pipe,

or pipes and fittings, valves or other appurtenances.

"Contaminant":  Any solid, liquid or gaseous matter

that, when present in a potable water supply distribution system, may cause the

water to degrade so that water quality standards are not met or physical

illness, injury or death to persons consuming the water could result.

"Contaminated Water":  Water not suitable for human

use or that does not meet the water quality standards of rules of the Illinois

Pollution Control Board titled Primary Drinking Water Standards.

"Continuous Vent":  A vertical vent that is a

continuation of the drain to which it connects.  The drain may be either

vertical or horizontal.  (See Appendix B.Illustration J.)

"Continuous Waste":  A drain or waste line from two

or more fixtures or sink compartments (of a single fixture), such as a combined

three- compartment sink, connected to a single common trap.

"Critical Level":  The mark on an atmospheric

vacuum breaker established by the manufacturer and stamped "-CL-". This

determines the minimum elevation above the flood-level rim or top of the

fixture, whichever shall apply, at which the device shall be installed.  When

an atmospheric vacuum breaker does not bear a critical level marking, the

bottom of the vacuum breaker shall constitute the critical level.

"Cross-Connection":  Any actual or potential

connection or arrangement between two otherwise separate piping systems, one

containing potable water and the other containing fluids or gases of any kind

that do not meet potable water quality standards, in which the non-potable

substances in one system may flow into the potable water system or enter it

through a means such as back pressure, back siphonage or aspiration

y actual or potential

connection or arrangement between two otherwise separate piping systems, one

containing potable water and the other containing fluids or gases of any kind

that do not meet potable water quality standards, in which the non-potable

substances in one system may flow into the potable water system or enter it

through a means such as back pressure, back siphonage or aspiration.

"Cross-Connection Control Assembly":  A tested and

approved plumbing appurtenance, complete with shut-off valves, installed in a

potable water line to prevent potable water from being mixed with any substance

from a piping system containing non-potable substances, connected in any manner

to the potable water supply.

"Cross-Connection Control by Containment":  The

installation of a backflow prevention device or assembly on the service line to

a premises to protect water quality.

"Cross-Connection Control by Isolation":  The

installation of a backflow prevention device or assembly at each actual or

potential cross-connection within a premises to protect water quality.

"Cross-Connection Control" or "CCC":  The

identification and elimination of all unprotected connections between a potable

water system and any other substance.

"Cross-Connection Control Device":  A plumbing

appurtenance installed in a potable water line to prevent any substance of any

kind from being mixed.

"Cross-Connection Control Device Inspector":  An

individual who holds an Illinois Plumbing License and who has been certified in

accordance with 35 Ill. Adm. Code 653.802 (Specific Conditions and Installation

Procedures) of the Illinois Environmental Protection Agency's rules titled

Design, Operation and Maintenance Criteria to inspect, test, maintain and

repair cross-connection control devices and assemblies.  The certification

attests to an inspector's understanding of the principles of backflow and back

siphonage, and the public health hazard presented by the improper installation

of cross-connection control devices

inois Environmental Protection Agency's rules titled

Design, Operation and Maintenance Criteria to inspect, test, maintain and

repair cross-connection control devices and assemblies.  The certification

attests to an inspector's understanding of the principles of backflow and back

siphonage, and the public health hazard presented by the improper installation

of cross-connection control devices.

"Cross-Connection, Non-Pressure Type":  A submerged

inlet installation where a potable water pipe is connected or extended below

the overflow rim of a receptacle, or an environment that contains a non-potable

substance at atmospheric pressure.

"Cross-Connection, Pressure Type":  An installation

where a potable water pipe is connected to a closed vessel or piping system

that contains a non-potable substance above atmospheric pressure.

"Dead End":  A pipe that is terminated at a

developed distance of 2 feet or more by means of a plug or other closed

fitting, except piping serving as a cleanout extension to an accessible area.

(See Appendix B.Illustration K.)

"Department":  The Illinois Department of Public

Health.

"Developed Length":  The length of a pipe measured

along the center line of the pipe, including fittings.

"Diameter":  The length of a straight line passing

through the center of an object, e.g., a circle.  (For the diameter of a pipe,

see "Pipe Diameter".)

"Drain":  Any pipe that carries waste water in a

building drainage system.  (See Appendix B.Illustration L.)

"Drain Laying":  The laying and connecting of

piping from 5 feet outside the foundation wall of a building to the public

sanitary sewer system in the street or alley.

"Drainage Fixture Unit" or "DFU":  The

mathematical factor used by the plumbing industry to estimate the probable load

on the drainage system caused by discharge from various plumbing fixtures.  One

drainage fixture unit is equivalent to 7½ gallons per minute or 1 cubic foot

per minute

5 feet outside the foundation wall of a building to the public

sanitary sewer system in the street or alley.

"Drainage Fixture Unit" or "DFU":  The

mathematical factor used by the plumbing industry to estimate the probable load

on the drainage system caused by discharge from various plumbing fixtures.  One

drainage fixture unit is equivalent to 7½ gallons per minute or 1 cubic foot

per minute.

"Drainage Piping"  (See "Drainage System".)

"Drainage System":  All piping within public or

private premises that conveys sewage, rain or other liquid wastes to a point of

disposal, but does not include the mains of a public sewer system or a private

or public sewage treatment or disposal plant.  The drainage system does not

include the venting system.  Drainage and venting are separate systems,

although both are part of the overall plumbing system.

"Durham System":  A soil or waste system where all

piping is of threaded pipe, using recessed drainage fittings.

"Effective Opening":  The minimum cross-sectional

area at the point of water supply discharge, measured or expressed in terms of

the diameter of a circle or, if the opening is not circular, the diameter of a

circle of equivalent cross-sectional area.  (This is applicable to sizing an

air gap.)

"Existing Plumbing" or "Existing Work":

A plumbing system or any part of a plumbing system that has been installed

prior to January 1, 2014.

"Extracted Mechanical Joint":  A joint that is

developed with a special drilling tool used to penetrate a copper pipe wall,

after which two steel pins are extended from the drill.  While rotating, the

drill head is withdrawn from the pipe under power, raising an external collar

from the hole in the pipe.  The branch pipe is then brazed into the collared

outlet.

"Fixed":  Stationary, immovable or immobile, as in

a fixed air gap.

"Fixture Branch":  A water supply pipe, soil pipe

or waste pipe serving one or more fixtures.

"Fixture Carrier":  A device designed to support an

off-the-floor plumbing fixture

s withdrawn from the pipe under power, raising an external collar

from the hole in the pipe.  The branch pipe is then brazed into the collared

outlet.

"Fixed":  Stationary, immovable or immobile, as in

a fixed air gap.

"Fixture Branch":  A water supply pipe, soil pipe

or waste pipe serving one or more fixtures.

"Fixture Carrier":  A device designed to support an

off-the-floor plumbing fixture.

"Fixture Drain":  The vertical or horizontal outlet

pipe from the trap of the fixture to the junction of that pipe with any other

drain pipe. (See Appendix B.Illustration M.)

"Fixture Supply":  A water supply pipe connecting

the fixture to a branch or main water supply pipe.

"Fixture Supply Stop":  A valve used to control

water supply to an individual plumbing fixture, appurtenance or appliance.

"Float Valve":  An automatic opening valve,

operated by a float, used to control the water level in a vessel, tank or other

container.

"Flood Level":  The elevation at which a liquid

will overflow the fixture or receptacle.

"Flood Level Rim":  The top edge of a receptacle or

fixture over which a liquid will flow when the receptacle or fixture is filled

beyond its capacity (or flooded).  "Overflow rim" is used

interchangeably with flood level rim.

"Flooded":  When the liquid in a fixture equals the

maximum capacity of the fixture or when the level of the liquid in the fixture

rises to the fixture's flood level rim.  Any attempt to add liquid to a flooded

fixture causes liquid to overflow.

"Flush Valve":  A device for the purpose of

flushing water closets and other similar fixtures.

"Flushometer

Valve":  A device actuated by hand, a photoelectric cell, or other

electronic control that discharges a predetermined quantity of water to

fixtures for flushing purposes.  The valve is closed by direct water pressure.

"Food Service Establishment":  Any establishment

selling or serving, to the public, food or liquid beverages that can be

consumed on the premises

similar fixtures.

"Flushometer

Valve":  A device actuated by hand, a photoelectric cell, or other

electronic control that discharges a predetermined quantity of water to

fixtures for flushing purposes.  The valve is closed by direct water pressure.

"Food Service Establishment":  Any establishment

selling or serving, to the public, food or liquid beverages that can be

consumed on the premises.

"Grade":

The fall, pitch or slope of a line of pipe in reference to a horizontal plane.

In drainage, it is usually expressed as the fraction of an inch fall per foot

length of pipe.  This may also be expressed as a percentage.  (See Appendix B.

Illustration O.)

"Graywater":  Untreated waste water that has not

come into contact with toilet waste, kitchen sink waste, dishwasher waste or

similarly contaminated sources.  Graywater includes waste water from bathtubs,

showers, lavatories, clothes washers and laundry tubs.  Also known as gray

water, grey water, and greywater.

"Grease Interceptor":  A device used to separate

and retain grease, oils and other floating matter from sewage waste while

permitting the remaining flow to discharge into the drainage system.  See

"Interceptor".

"Group of Fixtures":  Two or more fixtures adjacent

to or near each other.

"Hangers":  Devices for supporting and securing

pipe, fixtures and equipment to walls, ceilings, floors or any other structural

member.

"High Hazard Substance":  Any substance that, when

present in the potable water system, can cause illness, injury or death if

consumed

ge into the drainage system.  See

"Interceptor".

"Group of Fixtures":  Two or more fixtures adjacent

to or near each other.

"Hangers":  Devices for supporting and securing

pipe, fixtures and equipment to walls, ceilings, floors or any other structural

member.

"High Hazard Substance":  Any substance that, when

present in the potable water system, can cause illness, injury or death if

consumed.

"Historic Buildings":  All buildings, parts of

buildings, facilities or sites individually listed in or eligible for listing

in the National Register of Historic Places; a "contributing"

building or site in a National Register Historic District as determined by the

Illinois Historic Preservation Agency (IHPA) or as determined by a

"Certified Local Government" designated by IHPA; a building or site

designated as a historic or architectural landmark by a local Landmarks

Commission or local Historic Preservation Commission; or buildings that undergo

historic reconstruction.

"Horizontal Branch":  A drain pipe extending

laterally from a soil or waste stack or building drain, with or without

vertical sections or branches, that receives the discharge from one or more

fixture drains and conducts the discharge to the soil or waste stack or to the

building drain.  (See Appendix B.Illustration P.)

"Horizontal Pipe":  Any pipe or fitting that makes

an angle of less than 45 degrees with the horizontal.

"Hose":  A flexible tube for conveying fluids (as

from a faucet or hydrant).

"Hose Bibb":  A faucet to which a hose may be

attached.

"Hot Water":  Water at a temperature of not less

than 120 degrees Fahrenheit.

"House Drain"  (See "Building Drain".)

"House Trap"  (See "Building Trap".)

"Indirect Waste":  A pipe that does not connect

directly with the drainage system but conveys liquid waste by discharging

through an air gap into the drainage system

faucet or hydrant).

"Hose Bibb":  A faucet to which a hose may be

attached.

"Hot Water":  Water at a temperature of not less

than 120 degrees Fahrenheit.

"House Drain"  (See "Building Drain".)

"House Trap"  (See "Building Trap".)

"Indirect Waste":  A pipe that does not connect

directly with the drainage system but conveys liquid waste by discharging

through an air gap into the drainage system.

"Individual Dry Vent":  A pipe installed to vent a single

fixture trap that connects with the vent system above the fixture served, or that

terminates in the outside atmosphere. (See Appendix B.Illustration CC.)

"Individual Water System":  A piping system that

supplies potable water for a single family dwelling and includes the water

service line and all potable water piping.

"Industrial Wastes":  Liquid wastes resulting from

the processes employed in industrial and commercial establishments.

"Insanitary":  Contaminated.  Not hygienic or sufficiently

unclean to endanger health.

"Interceptor":  A device designed and installed to

separate and retain hazardous or undesirable matter from normal waste and to permit

normal sewage or liquid waste to discharge into the drainage system.

Interceptors may be designed to remove gas, oil, sand, grit and grease.  "Separator"

is also commonly used to mean an "interceptor."

"Invert":  The lowest part of the internal

cross-section of a pipe or conduit.

"Island Fixture Vent":  A vent in which the vent

pipe rises as near as possible to or above the highest water level in the

fixture vented and then turns down before rising to connect to the vent system

6 inches above the flood level rim or terminating to the atmosphere.  (See

Section 890.1600, "Special Venting for Island Fixtures".)

"Joint":  The juncture of two pipes, a pipe and a

fitting, or two fittings.

"Kiosk":  A freestanding place of employment that

has five or fewer employees at any time, located inside or outside a building

then turns down before rising to connect to the vent system

6 inches above the flood level rim or terminating to the atmosphere.  (See

Section 890.1600, "Special Venting for Island Fixtures".)

"Joint":  The juncture of two pipes, a pipe and a

fitting, or two fittings.

"Kiosk":  A freestanding place of employment that

has five or fewer employees at any time, located inside or outside a building.

"Kitchen or Bar Sink Faucet":

A faucet that discharges into a kitchen or bar sink in domestic or commercial

installations. Supply fittings that discharge into other types of sinks,

including clinic sinks, floor sinks, service sinks and laundry trays, are not

included.

"Labeled":

An indication that an agency approved by the Department or that is an

ANSI-accredited certification program has certified the plumbing material to be

in compliance with applicable standards in accordance with this Part.

"Lavatory

Faucet":  A faucet that discharges into a lavatory basin in a domestic or

commercial installation.

"Lead

Free":  When used with respect to solder and flux, refers to products

containing not more than 0.2 percent lead and, when used with respect to wetted

surfaces of pipe, pipe fittings, and fixtures, refers to materials containing

no more than a weighted average of 0.25 percent lead.  Exemptions include

pipes,

pipe fittings, plumbing fittings, or fixtures, including backflow preventers,

that are used exclusively for nonpotable services, such as manufacturing,

industrial processing, irrigation, outdoor watering, or any other uses where

the water is not anticipated to be used for human consumption; or toilets,

bidets, urinals, fill valves, flushometer valves, tub fillers, shower valves,

service saddles, or water distribution main gate valves that are 2 inches in

diameter or larger.

(Section 1417(a)(4)(A) and (B) of the Safe Drinking

Water Act)

"Length of Pipe":  The overall distance measured

along the center line of a pipe.  See "Developed Length"

pated to be used for human consumption; or toilets,

bidets, urinals, fill valves, flushometer valves, tub fillers, shower valves,

service saddles, or water distribution main gate valves that are 2 inches in

diameter or larger.

(Section 1417(a)(4)(A) and (B) of the Safe Drinking

Water Act)

"Length of Pipe":  The overall distance measured

along the center line of a pipe.  See "Developed Length".

"Line Valve":  A valve in the water supply

distribution system, except those immediately controlling one fixture supply.

"Liquid Waste":  The discharge from any fixture,

appliance or appurtenance, in connection with a plumbing system that does not

receive fecal matter.

"Load Factor":  The percentage of the total

connected fixture unit flow rate that is likely to occur at any point in the

drainage system.  The load factor varies with the type of occupancy, the total

flow above the point being considered, and probability of simultaneous use.

Load factor represents the ratio of the probable load to the potential load.

"Local Ventilating Pipe":  A pipe on the fixture

side of the trap through which vapors or gases or foul air is removed from a

room or fixture to the outside atmosphere.  Certain special apparatus, such as

sterilizers, are sometimes provided with a local ventilating pipe to remove

vapors.  A local ventilating pipe is not connected into the vent piping of the

drainage system.

"Loop Vent":  A circuit vent that loops back to

connect with a stack vent instead of a vent stack.  Its use is limited to floor

drains and floor outlet fixtures.

"Low Hazard Substance":  Any substance that, when

present in the potable water system, may cause the water to be discolored or have

an unusual odor or an unpleasant taste, but will not cause illness, injury or

death if consumed.

"Main":  The principal artery of a piping system to

which branches may be connected.

"Main

Vent":  The principal artery of the venting system to which vent branches

may be connected.  A main vent may be a vent stack or stack vent

e potable water system, may cause the water to be discolored or have

an unusual odor or an unpleasant taste, but will not cause illness, injury or

death if consumed.

"Main":  The principal artery of a piping system to

which branches may be connected.

"Main

Vent":  The principal artery of the venting system to which vent branches

may be connected.  A main vent may be a vent stack or stack vent.  (See

Appendix B.Illustration Q.)

"Maximum Demand":  In plumbing, the greatest

requirement of flow of either water supply or waste discharge from the fixtures

of a building, or any specific segment of the building fixtures.

"Manhole":  An opening constructed to permit a

person to gain access to an enclosed space.  In a sewer or any portion of the

plumbing system, it is used to eliminate restriction of flow at changes of

direction or junctions and to facilitate cleaning.

"Metering

Faucet":  A self-closing faucet that dispenses a specific volume of water

for each actuation cycle. The volume or cycle duration can be fixed or

adjustable.

"Minor

Repairs":  Repairs that do not require changes in the piping to or from

plumbing fixtures or involve the removal, replacement, installation or

reinstallation of any pipe or plumbing fixture.

"Multi-person

Showers": Shower compartments designed and intended for use by two or more

persons simultaneously.

"New

Plumbing" or "New Work":  Any plumbing system or part of a

plumbing system, or any addition to or alteration of an existing system, being

installed or recently completed.

"Non-Potable Water":  Water that does not meet

drinking water quality standards specified in the Pollution Control Board's

rules titled Primary Drinking Water Standards, and is not suitable for human

consumption or culinary use, or is of unknown quality.

"Non-Toxic Transfer Fluids":  Fluids having no

normal detrimental effect on humans.

"Occupancy":  The purpose for which a building is

currently used

able Water":  Water that does not meet

drinking water quality standards specified in the Pollution Control Board's

rules titled Primary Drinking Water Standards, and is not suitable for human

consumption or culinary use, or is of unknown quality.

"Non-Toxic Transfer Fluids":  Fluids having no

normal detrimental effect on humans.

"Occupancy":  The purpose for which a building is

currently used.  In the case of a single family residence, occupancy shall mean

taking possession of and living in the premises as one's sole and exclusive

residence for a period of not less than six months after the completion of

construction or issuance of a Certificate of Occupancy by a unit of local

government.

"Offset":  A combination of elbows or bends that brings

one section of pipe into a line parallel with another section.

"Open Plumbing":  Installation of plumbing so that

traps and drainage pipes and their surroundings beneath fixtures are

ventilated, accessible and open to inspection.  Open plumbing is also referred

to as an exposed plumbing installation.

"Overflow Rim":  The top edge of a receptacle or

fixture over which a liquid will flow when the receptacle or fixture is filled

beyond its capacity (or flooded).  "Flood level rim" is used

interchangeably with overflow rim.

"Part":  This Illinois Plumbing Code in its

entirety or any emergency rule that the Department adopts, during the effective

period of the emergency rule.

"Peppermint Oil":  A pungent, aromatic mint oil

sometimes used in testing a drain, waste and vent system by means of a

"Peppermint Test".

"Peppermint Test":  A test for leakage using

peppermint oil and hot water as the media, and the sense of smell to determine

any leak; also known as a "scent test" (see Section 890.1930(e)).

"Pet Cock":  A small faucet or valve used to drain

water, steam or air.

"pH":  An expression of acidity and alkalinity on a

scale from zero to 14, with 7.0 being neutral

em by means of a

"Peppermint Test".

"Peppermint Test":  A test for leakage using

peppermint oil and hot water as the media, and the sense of smell to determine

any leak; also known as a "scent test" (see Section 890.1930(e)).

"Pet Cock":  A small faucet or valve used to drain

water, steam or air.

"pH":  An expression of acidity and alkalinity on a

scale from zero to 14, with 7.0 being neutral.  Numbers less than 7.0 indicate

increasing acidity as the number decreases, and numbers greater than 7.0 indicate

increasing alkalinity as the number increases.

"Pipe":  A cylindrical conduit or conductor, the

wall thickness of which is sufficient to receive a standard pipe thread.

"Pipe Diameter":  The distance measured from the

inside wall of a pipe (passing through the center of the pipe) to the opposite

inside wall.  Any referenced pipe diameter or pipe size shall mean the nominal

size or diameter.

"Pipefitting":  The installation of piping other

than piping that is defined as plumbing.

"Pipe Increments":  Increasing or decreasing pipe

size by a given number − the following examples constitute one pipe size

change:  1, 1¼, 1½, 2, 2½, 3, 3½, 4, 4½, 5.

"Piping":  An assembly of pipes or conduit with

fittings of compatible design.  This term is commonly interchanged with

"Pipe".

"Pitch":  Synonymous with "grade".  (See

"Grade".)

"Plumbing":  See the Illinois Plumbing License Law.

"Plumbing Appliance":  A special class of plumbing

fixture intended to perform a special function.  This term includes water

heaters, water coolers, drinking fountains, and heat exchanger and water

treatment equipment other than water softeners.

"Plumbing Appurtenance":  An accessory or device

used in a plumbing system which demands no additional water supply, nor adds

any discharge load to a fixture or the drainage system.  Plumbing appurtenances

include instruments, gauges, relief valves, limit switches, backflow

assemblies, solenoid valves and devices between solenoid valves

nd water

treatment equipment other than water softeners.

"Plumbing Appurtenance":  An accessory or device

used in a plumbing system which demands no additional water supply, nor adds

any discharge load to a fixture or the drainage system.  Plumbing appurtenances

include instruments, gauges, relief valves, limit switches, backflow

assemblies, solenoid valves and devices between solenoid valves.

"Plumbing Fixture":  Approved, installed

receptacles, devices or appliances that are supplied with water or that receive

or discharge liquid or liquid-borne waste, with or without discharge of the

waste into the drainage system to which they may be directly or indirectly

connected;  an installed appurtenance to the potable water supply system that makes

available intended potable water, or a receptor that receives and discharges

liquids or liquid-borne waste either directly or indirectly into the drainage

system; or a  permanent appendage usually designed as a receptacle and intended

to receive or discharge liquid or liquid-borne waste to a drainage system.

Industrial or commercial tanks, vats, and similar processing equipment are not

plumbing fixtures, but they may be connected to, or discharged into, approved

traps or plumbing fixtures.

"Plumbing Inspector":  An employee or agent of

State or local government who holds a valid Illinois Plumbing License and is

authorized to inspect plumbing.

"Plumbing System":  See the Illinois Plumbing

License Law.

"Pop-Up Waste":  A waste outlet into which a

sliding metal or plastic stopper is fitted, and the stopper can be raised to

drain the waste.  A common pop-up waste used for lavatories has a lever that

passes out the side of the drain fitting and connects to a lift rod that

extends on top of the lavatory or sink. The rod is lifted to lower the stopper,

or depressed to raise the stopper and drain the lavatory

":  A waste outlet into which a

sliding metal or plastic stopper is fitted, and the stopper can be raised to

drain the waste.  A common pop-up waste used for lavatories has a lever that

passes out the side of the drain fitting and connects to a lift rod that

extends on top of the lavatory or sink. The rod is lifted to lower the stopper,

or depressed to raise the stopper and drain the lavatory.

"Potable Water":  Water that meets drinking water

quality standards specified in the Pollution Control Board's rules titled

Primary Drinking Water Standards and is suitable for human consumption or

culinary use.

"Pre-Rinse

Spray Valve":  A hand-held device for use with commercial dishwashing and

ware-washing equipment that sprays water on dishes, flatware and other food

service items for the purpose of removing food residue before cleaning and

sanitizing the items.

"Pressure

Gradient Monitor":  A device used to protect the quality of water,

failsafe by design, securing the potable water system by isolating a heat

exchanger when the pressure between the potable water and the heat exchange

medium drops below a preset level.

"Pressure Relief Valve"  (See "Relief

Valves".)

"Private" or "Private Use":  In the

classification of plumbing fixtures, private applies to fixtures in residences,

apartments and private bathrooms of hotels or motels where the fixtures are intended

for the use of a single family or an individual; handwashing stations

(lavatories) within residents' rooms, within shared or common resident

restrooms, or designated for staff use only in hospitals/long-term care

units/mental health facilities, and hand-washing stations where food is being

prepared.

"Private Sewage Disposal System":  Any sewage

handling or treatment facility receiving domestic sewage from fewer than 15 people

or population equivalent and having a ground surface discharge or any sewage

handling or treatment facility receiving domestic sewage and having no ground

surface discharge

care

units/mental health facilities, and hand-washing stations where food is being

prepared.

"Private Sewage Disposal System":  Any sewage

handling or treatment facility receiving domestic sewage from fewer than 15 people

or population equivalent and having a ground surface discharge or any sewage

handling or treatment facility receiving domestic sewage and having no ground

surface discharge.  Refer to the Private Sewage Disposal Licensing Act  and

Private Sewage Disposal Code.

"Private Sewer":  A sewer privately owned and not

directly controlled by a public authority.

"Private Water Supply":  Any potable water supply that

provides water for drinking, culinary and sanitary purposes and serves an

owner-occupied single family dwelling.

"Proper" or "Properly": To be accurate or

meeting the standard of competence for the given situation and properties of

the materials involved based upon the standards in this Part and manufacturer's

recommendations.

"p.s.i";

"P.S.I."; or "psi":  Pounds per square inch gauge of

pressure.

"Public"

or "Public Use":  Any installation or use of plumbing fixtures or

facilities except those in residences, apartments or private bathrooms of

hotels/motels where the fixtures are intended for the personal use of an

individual or single family only.

"Public Area":  An area within a building

accessible to all persons, including, but not limited to, mercantile units,

private clubs and membership organizations.

"Public Sanitary Sewer":  A sewer that is

controlled by a public authority and is intended to receive and transport

sewage.

"Public Water System":  A system for providing

piped water to the public for human consumption, if the system has at least 15

service connections or regularly serves an average of at least 25 individuals

daily at least 60 days per year

clubs and membership organizations.

"Public Sanitary Sewer":  A sewer that is

controlled by a public authority and is intended to receive and transport

sewage.

"Public Water System":  A system for providing

piped water to the public for human consumption, if the system has at least 15

service connections or regularly serves an average of at least 25 individuals

daily at least 60 days per year. The term public water system includes:  any

collection, treatment, storage and distribution facility under the control of

the operator of the system and used primarily in connection with the system;

and any collection or pretreatment storage facilities not under control of the

operator of the system that are used primarily in connection with that system.

The public water system ends at and with the water service connection.

"Quarter Bend":  A fitting changing direction of 90

degrees .

"Quick Closing Valve":  A valve or faucet that

closes automatically when released or one that has fast action closing.

"Readily

Accessible":  Direct access without the necessity of removing or moving

any panel, door or similar obstruction.

"Receptor":  Devices or fixtures that receive the

discharge from indirect waste pipes.

"Reduced

Pressure Zone Principle Backflow Preventer Assembly" or "RPZ"  (See

"Backflow Preventer, Reduced Pressure Principle Backflow Preventer

Assembly" or "RPZ".)

"Relief Valves":

Temperature relief valve − A valve designed to release

water to the atmosphere at a predetermined temperature setting.

Pressure relief valve − A valve designed to relieve

excessive pressure to the atmosphere at a predetermined setting.

Temperature and pressure relief valve or pressure-temperature

relief valve − A valve incorporating a temperature relief valve and a

pressure relief valve in one unit.

Vacuum relief valve − A valve that admits air to the

system when the system is attempting to reduce its pressure to less than

atmospheric

valve designed to relieve

excessive pressure to the atmosphere at a predetermined setting.

Temperature and pressure relief valve or pressure-temperature

relief valve − A valve incorporating a temperature relief valve and a

pressure relief valve in one unit.

Vacuum relief valve − A valve that admits air to the

system when the system is attempting to reduce its pressure to less than

atmospheric.

"Relief Vent":  A vent that permits circulation of

air in or between drainage and vent systems.  (See Appendix B.Illustration S.)

"Restroom":  As a minimum, will consist of one

water closet and one lavatory, all located in the same room.

"Return Offset":  A double offset installed so as

to return the pipe to its original alignment.

"Revent Pipe"  (See "Individual Dry Vent".)

(See Appendix B.Illustration U.)

"Rim":  An unobstructed open edge of a fixture.

"Riser":  A water supply pipe that extends

vertically one full story or more to convey water to branches or to a group of

fixtures.

"Roughing-In":

The installation of all parts of the plumbing system that can be completed

prior to the installation of fixtures.  This includes drainage, water supply,

and vent piping, and the necessary fixture supports.

"Safe

Pan":  An appurtenance installed beneath piping or a fixture to collect

and drain any leakage.  Safe pans are generally found  in food

preparation/storage areas and sterile areas of health care facilities that have

overhead, exposed drainage piping.  Safe pans are not intended to receive

discharges from temperature and pressure relief valves.

"Safe Waste"  (See "Indirect Waste".)

"Sanitary Sewer":  A public or private sewer into

which building sewers are connected.

"Sanitary Waste":  Sewage containing excrement and

liquid wastes or ordinary wastes derived from a plumbing system.

"Self

Closing Faucet":  A faucet that closes itself after the actuation or

control mechanism is deactivated. The actuation or control mechanism can be

mechanical or electronic

ndirect Waste".)

"Sanitary Sewer":  A public or private sewer into

which building sewers are connected.

"Sanitary Waste":  Sewage containing excrement and

liquid wastes or ordinary wastes derived from a plumbing system.

"Self

Closing Faucet":  A faucet that closes itself after the actuation or

control mechanism is deactivated. The actuation or control mechanism can be

mechanical or electronic.

"Semi-Private

Water System":  A water supply that is not a public water system and that serves

a segment of the public other than an owner-occupied single family dwelling.

(See Section 19 of the Illinois Groundwater Protection Act.)

"Separator"  (See "Interceptor".)

"Service Connection":  The tap at the water main

and any pipe to the property line.

"Sewage":  Any waste containing animal, human or

vegetable matter in suspension or solution, and may include liquids containing

chemicals in solution.

"Sewage Ejector":  A device for lifting sewage by

pumping means.

"Sillcock":  A type of lawn faucet.  A faucet used

on the outside of a building to which a garden hose may be attached.

"Size of Pipe or Tubing":  Pipe is generally sized

according to the approximate dimension of its bore or inside diameter, whereas

tubing is usually sized by measuring its outside diameter.  Both are expressed

in inches and fractions of inches.  For purposes of this Part, any referenced

pipe or tubing size shall mean the nominal size or diameter as designated by

the commercial manufacturer.

"Slope":  Synonymous with "grade."  (See

"Grade".)

"Soil Pipe":  Any pipe that conveys the discharge

of water closets or fixtures having similar functions, with or without the

discharge from other fixtures, to the building drain.

"Special Waste Pipe":  Piping that conveys special

waste.  Piping that has been designed and manufactured of special material to

handle special waste such as acids.

"Special Wastes":  Wastes that require special

handling and treatment before they may be discharged into the plumbing system

xtures having similar functions, with or without the

discharge from other fixtures, to the building drain.

"Special Waste Pipe":  Piping that conveys special

waste.  Piping that has been designed and manufactured of special material to

handle special waste such as acids.

"Special Wastes":  Wastes that require special

handling and treatment before they may be discharged into the plumbing system.

(See Subpart H.)

"Sprinkler System":

Fire sprinkler

system − a system of piping and necessary appurtenances for conveying

water or other extinguishing substances to outlets for the purpose of fire

extinguishment.

Lawn sprinkler

system − a system of piping installed for irrigation purposes.

"Stack":  Any vertical line of soil, waste or vent

piping.

"Stack Vent":  The extension of a soil or waste

stack above the highest horizontal drain connected to the stack.  (See Appendix

B.Illustration V.)

"Stack Venting":  A method of venting a fixture or

fixtures through the soil or waste stack.

"Sterilizer":

Boiling Type

Sterilizer − a fixture (non-pressure type) used for boiling instruments,

utensils ­or other equipment (used for sterilization).  Some devices are

portable; others are connected to the plumbing system.

Instruments

Sterilizer − a device for the sterilization of various instruments.

Pressure

(Autoclave) Sterilizer − a fixture (pressure vessel) designed to use

steam under pressure for sterilizing.

Pressure

Instrument Washer-Sterilizer − a fixture (pressure vessel) designed to

both wash and sterilize instruments during the operating cycle of the fixture.

Sterilizer

Vent − a separate pipe or stack that is trapped below the lowest exhaust

and indirectly connected to the building drainage systems and that receives the

vapors from non-pressure sterilizers, or the exhaust vapors from pressure

sterilizers, and conducts the vapors directly to the outside atmosphere.

Sometimes called a vapor, steam, atmospheric or exhaust vent

g cycle of the fixture.

Sterilizer

Vent − a separate pipe or stack that is trapped below the lowest exhaust

and indirectly connected to the building drainage systems and that receives the

vapors from non-pressure sterilizers, or the exhaust vapors from pressure

sterilizers, and conducts the vapors directly to the outside atmosphere.

Sometimes called a vapor, steam, atmospheric or exhaust vent.

Water

Sterilizer − a device for sterilizing water and storing sterile water.

"Storm

Sewer":  A sewer that is used for conveying rain water, surface water,

ground water, subsurface water, site drainage, condensate, cooling water or

other similar liquid waste (excluding sewage) from the building storm drain to

an approved point of discharge.

"Sub-soil

Drain":  A drain that collects sub-soil drainage and conveys it to a place

of disposal.

"Sub-soil Drainage":  Liquid waste, such as run-off

water, seepage water or clear water waste, free of fecal matter and graywater.

"Sump":

A receptacle that receives sanitary or storm waste, located below the normal

grade level of the gravity system and emptied by pumping or gravity.

"Sump Pump":  A pump for the removal of storm,

subsoil and clear water waste drainage from a sump.

"Supports":  A hanger, anchor or other device for

securing or holding pipe fixtures to walls, ceilings, floors or structural

members.

"Swimming

Pool":  See the Swimming Facility Act  for minimum sanitary requirements

for the design and operation of swimming facilities.

"Tempered Water":  Water ranging in temperature

from 85 degrees Fahrenheit to, but not including, 120 degrees Fahrenheit.

"Terminal Heating Device":  A device located within

the environment to be conditioned that directly transfers its heating energy by

radiation or forced or gravity convection.

"Test Cock":  A small cock, faucet or valve set in

a water pipe, pump, backflow device or water jacket and used to drain water or

test pressure.

"Toxic":  Not fit for human consumption; poisonous

, 120 degrees Fahrenheit.

"Terminal Heating Device":  A device located within

the environment to be conditioned that directly transfers its heating energy by

radiation or forced or gravity convection.

"Test Cock":  A small cock, faucet or valve set in

a water pipe, pump, backflow device or water jacket and used to drain water or

test pressure.

"Toxic":  Not fit for human consumption; poisonous.

"Toxic Transfer Fluids":  Sanitary waste, graywater,

or mixtures containing harmful substances, including, but not limited to,

ethylene glycol, hydrocarbons, oils, ammonia refrigerants, and hydrazine.

"Trap":  A fitting or device designed and

constructed to provide, when properly vented, a liquid seal that will prevent

the back passage of air without materially affecting the flow of sewage or

waste water through it.  (See Appendix B.Illustration W.)

"Trap Arm":  The portion of a fixture drain between

a trap and its vent.

"Trap Primer":  A device or system of piping to

maintain a water seal in a trap.

"Trap Seal":  The vertical distance between the

crown weir and the top of the dip of the trap.  (See Appendix B.Illustration W.)

"Tube":  A cylindrical conduit or conductor, the

wall thickness of which is less than that needed to receive a standard pipe

thread. Compare with "Pipe".

"Tuberculation":  A condition that develops on the

interior of pipe due to corrosion, resulting in the creation of small,

hemispherical lumps (tubercules) on the inner walls of the pipe.

"Union":  A coupling device used to join two pipes

end-to-end, but allow them to be disconnected and re-connected.  This joint can

be assembled and disassembled without removing any adjacent pipes.

"Unisex Restroom":  A restroom shared by males and

females and having only one water closet and one lavatory located in the same

room.  In addition, a single urinal may be installed.

"Vacuum":  A pressure less than atmospheric

pressure, sometimes referred to as suction

w them to be disconnected and re-connected.  This joint can

be assembled and disassembled without removing any adjacent pipes.

"Unisex Restroom":  A restroom shared by males and

females and having only one water closet and one lavatory located in the same

room.  In addition, a single urinal may be installed.

"Vacuum":  A pressure less than atmospheric

pressure, sometimes referred to as suction.  It is usually measured in inches

of mercury below atmospheric pressure, such as 10 or 20 inches of mercury.  To

vacuum also means to siphon.

"Vacuum Breaker":  A device that prevents the

creation of a vacuum by admitting air at atmospheric pressure, used to prevent

back siphonage.

"Vacuum Breaker, Hose Type" or "HVB":  A

back siphonage prevention device designed for hose connections that are not

under continuous pressure, and meeting the requirements of ASSE 1011.

"Vacuum Relief Valve":  A device to prevent

excessive vacuum in a pressure vessel.

"Vent Pipe":  A pipe in a plumbing system that is

used to equalize pressure and ventilate the plumbing system.  Also see the

definition of "Vent System".

"Vent Stack":  A vertical vent pipe installed

primarily for the purpose of providing circulation of air to and from any part

of the drainage system and terminating to the atmosphere or in the stack vent.

"Vent System":  The pipe or pipes installed to

provide a flow of air to or from a drainage system and to provide a circulation

of air within the system to protect trap seals from siphonage and back

pressure.

"Venturi":  A short section in a pipe with a

reduced diameter or cross-sectional area (forming a throat) compared to the

larger ends, thereby increasing the velocity of the fluid passing through the

throat and decreasing the pressure at the throat.  This decrease in pressure

allows another fluid to be drawn into the venturi.

"Vertical Pipe":  Any pipe or fitting that makes an

angle of 45 degrees or less with the vertical

n a pipe with a

reduced diameter or cross-sectional area (forming a throat) compared to the

larger ends, thereby increasing the velocity of the fluid passing through the

throat and decreasing the pressure at the throat.  This decrease in pressure

allows another fluid to be drawn into the venturi.

"Vertical Pipe":  Any pipe or fitting that makes an

angle of 45 degrees or less with the vertical.

"Wall Hung Water Closet":  A water closet installed

so that no part of the water closet touches the floor.

"Waste"  (See "Sanitary Waste".)

"Waste Pipe":  A pipe that conveys only waste

material.

"Water

Closet":  A fixture with a water-containing receptor that receives liquid

and solid body waste and, on actuation, conveys the waste through an exposed

integral trap into a drainage system. Also referred to as a toilet.

"Water

Distribution Pipe":  A pipe within the building or on the premises that

conveys water from the water service to the point of usage.

"Water

Hammer":  A concussion or sound of concussion of moving water against the

sides of a containing pipe or vessel due to a sudden stoppage of flow.  A

pressure that results from a sudden deceleration of flow of water in a closed

conduit.  It is also called hydraulic shock.

"Water Hammer Arrester":  A device to absorb

hydraulic shock.

"Water Heater":  An appliance for supplying hot

water for domestic or commercial purposes.  It may be used for space heating if

the water temperature does not exceed 150 degrees Fahrenheit.

"Water Main":  A water supply pipe for public or

community use.

"Water Outlet":  An opening through which water is

supplied to a fixture, device, appliance or appurtenance, or into the

atmosphere.

"Water Riser Pipe"  (See "Riser".)

"Water

Service" or "Water Service Pipe":  The pipe from the water main

or source of potable water supply to the water distribution pipe of the

building served

it.

"Water Main":  A water supply pipe for public or

community use.

"Water Outlet":  An opening through which water is

supplied to a fixture, device, appliance or appurtenance, or into the

atmosphere.

"Water Riser Pipe"  (See "Riser".)

"Water

Service" or "Water Service Pipe":  The pipe from the water main

or source of potable water supply to the water distribution pipe of the

building served.

"Water Supply Fixture Unit" or "WSFU":

The mathematical factor used by the plumbing industry to estimate the probable

demand on the water supply system (considering the volume, duration of flow,

and intervals between operations) caused by various plumbing fixtures.

"Water Supply Stub":  A vertical pipe less than one

story in height supplying one or more fixtures.

"Water Supply System":  The water service pipe, the

water distribution pipe, and all fittings, valves and appurtenances in or

associated with the building or premises being served.

"Wet

Vent":  A vent that also serves as a drain.  (See Appendix B.Illustration

Y.)

"Yard Hydrant":  A valve or faucet for drawing

water from a buried pipe that includes a stand pipe with a valve or faucet at

the upper end and a threaded valve outlet to which a hose may be attached.

"Yoke Vent":  A pipe connecting upward from a soil

or waste stack to a vent stack for the purpose of preventing pressure changes

in the stack.  (See Appendix B.Illustration Z.)