25 TAC § 265.157. Filters
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Texas Administrative Code › Title 25 HEALTH SERVICES › Part 1 DEPARTMENT OF STATE HEALTH SERVICES › Chapter 265 GENERAL SANITATION › 25 TAC § 265.157
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(a) NSF/ANSI standards. Filters shall be listed and labeled to NSF/ANSI Standard 50 or NSF/ANSI Standard 60, unless the lagoon was constructed before the effective date of this subchapter and it uses filters that are not replaced.
(b) Filters cleanable. For lagoons constructed on or after the effective date of this subchapter, filters shall be designed so that after cleaning according to manufacturer's instructions, the system provides the required water clarity.
(c) Observable waste discharge. For a lagoon constructed on or after the effective date of this subchapter, filters shall have a readily observable free fall or sight glass installed on the waste discharge line in order that the filter washing progress may be observed. Sight glasses shall be readily removable for cleaning.
(d) Filters accessible. Filters shall be installed so that filtration surfaces are accessible for inspection and service in accordance with manufacturer's instructions.
(e) Operation and maintenance instructions. Filters and separation tanks shall have operation and maintenance instructions permanently installed on the filter or separation tank. Maintenance instructions shall be unobstructed and clearly visible.
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