Recirculation and filtration.
Seattle Mun. Code § 10.56.070
in effect10.56.070 - Recirculation and filtration.
Recirculation and filtration equipment adequate to recirculate and filter the entire volume of water at least once every six (6) hours shall be provided for every public swimming pool; and at least once every twelve (12) hours for every semipublic swimming or wading pool; and at least once every thirty (30) minutes for every spa pool. Such equipment shall be in operation at all times such pool is open for use; provided, that such recirculation and filtration equipment need not be provided for a flow-through pool in which the supply of water meets the water quality requirements of Section 10.56.050, hereof, and the disinfection requirements of Section 10.56.060, hereof; and such supply is sufficient to provide a complete change of water within the time period required by this section; and the introduction of such water supply into the pool is accomplished by the same type of inlet design required for recirculation pools. Where more than one pool is located on the same premises, each must have an independent recirculation and filtration system.
(Ord. 110180, § 1, 1981.)
Source: City of Seattle, Seattle Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/wa/seattle/codes/municipal_code?nodeId=TIT10HESA_CH10.56SWSPPOCO_10.56.070REFIFetched: 11/1/2026