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D.C. Municipal Regulations (Last Updated: September 13, 2017) |
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Title 25. FOOD OPERATIONS AND COMMUNITY HYGIENE FACILITIES |
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SubTilte 25-C. SWIMMING POOL AND SPA REGULATIONS |
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Chapter 25-C64. SWIMMING POOLS AND SPAS |
Section 25-C6420. RECIRCULATION AND TREATMENT SYSTEM
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6420.1The pool recirculation system shall be operated at all times when the pool is open for use. The recirculation system may be shut off three (3) hours after the pool closes and shall be turned back on three (3) hours before opening the pool. Shut down time shall be controlled by a time clock.
6420.2Recirculation and treatment equipment such as filters, recessed automatic surface skimmers, water ionizers, ozone generators, disinfection feeders and chlorine generators shall be tested and approved using the NSF/ANSI Standard 50-2007, Circulation System Components and Related Materials for Swimming Pool, Spas/Hot Tubs, dated April 2007.
6420.3The recirculation system shall be designed to provide a minimum of four (4) turnovers of the pool volume per day. Pools that are less than one thousand square feet (1000 sq. ft.) shall be required to provide eight (8) turnovers per day.
6420.4The design pattern of recirculation flow shall be one hundred percent (100 %) through the main drain piping and one hundred percent (100 %) through the perimeter overflow or sixty percent (60%) through the skimmer system.
6420.5All swimming pools including wading pools and spas that are open to the public and that are built without a main drain collector tank shall be retrofitted with a properly sized and piped collector tank to eliminate direct suction through the main drain on or before December 19, 2008.
6420.6All existing public swimming pools with direct suction shall install a main drain cover that meets the ANSI/ASME A112.19.8-2007 standard for drain covers on or before December 19, 2008.
6420.7Public pools and spas with a single main drain (other than an unblockable drain) shall be equipped with a device or system such as a safety vacuum release system to prevent entrapment.
6420.8Public pools and spas that are not in operation on December 19, 2008 do not need to meet the requirements specified in section 6420.5 and 6420.6 until they resume operations.
6420.9A construction permit shall be obtained from the Department of Consumer and Regulatory Affairs prior to installation of a collector tank.
6420.10Any pool that cannot be retrofitted by the dates specified in sections 6420.5 and 6420.6 shall be closed on or before December 19, 2008.
6420.11Newly constructed swimming pools and spas built after the effective date of these regulations shall be built with either:
(a)More than one (1) drain;
(b)One (1) or more unblockable drains; or
(c)No main drain.