Regen Media Filter & Filter Media Task Group Update

Joint Committee Acceptance Allow Performance Based Testing Expansion of performance based testing criteria Allow for introduction of new technology without standards change

Current Performance Testing Required Physical Evaluation applicable to all filters Pressure Head Loss sand filter bed measures for flatness Regen Media Filter Cake consistency and stability not evaluated Filter Media Cleanability Turbidity Reduction Applicable to all filters Precoat Behavior precoating in a closed loop exempt from this test.

Regen Media Filter Critical Points of Testing Filter media behavior Sand filter bed flatness Confirmation of stable filter cake formation Filter cleanability Sand filter backwash Regen Media Filter bump cycle Regen Media Filter cleanability inspection Finer filtration Micron removability easily confirmed

Simple Solution 5.2 Diatomite and other precoat media-type filters The requirements in this subsection apply only to pre-coat media-type filters utilizing diatomite or other pre-coat filter media (that conforms to 5.2.9) and their integral components designed for the filtration of swimming pool or spa/hot tub water. The design guide lines listed are meant for reference with some variance in operation such as reuse of filter media with a bump cycle and bridging of filter media during the filter cycle will be allowed. Filters seeking an operational variance shall be operated in accordance with the manufacture’s stated procedures while complying with all performance evaluation standards including filter media behavior before and after bumping as well as filter cleanability during media removal. The filter manufacturer shall provide product samples that allow for complete physical evaluation during all cycles of operation. Any claims of filter performance such as but not limited to finer filtration or water savings shall be validated during performance testing. Any reduction of filter cake stability that could result in an uncoated element active surface area during the precoat or filter cycle shall require immediate bumping or media replacement depending the status of filter operation.

Simple Solution 5.3 Sand-type filters and alternate sand-type media The requirements in this subsection apply only to sand-type filters and their integral components designed for the filtration of swimming pool or spa/hot tub water. The design guide lines listed are meant for reference with some variance in operation such as reduction in filter backwash rates will be allowed. Filters seeking an operational variance shall be operated in accordance with the manufacture’s stated procedures while complying with all performance evaluation standards including filter media behavior and filter cleanability. The filter manufacturer shall provide product samples that allow for complete physical evaluation during all cycles of operation. Any claims of filter performance such as but not limited to finer filtration or water savings shall be validated during performance testing.

Conclusion Allows Variance to Filter Operation Through Expansion of performance based testing criteria Allows for introduction of new technology without standards change Solves Regen Media Filter bridging issue now outstanding for 9 years