Full Description

The purpose of this Standard is to establish minimum materials, design and construction, and performance requirements for equipment commonly included in the water circulation system of residential and public swimming pools, spas, or hot tubs. It incorporates minimum requirements for equipment previously covered by the following individual NSF standards: Standard 9 - Diatomite-type filters for swimming pools; Standard 10 - Sand-type filters for swimming pools; Standard 11 - Recessed automatic surface skimmers for swimming pools; Standard 17 - Centrifugal pumps for swimming pools; Standard 19 - Adjustable output rate chemical feeding equipment for swimming pools; Standard 27 - Multiport valves for swimming pools; Standard 28 - Cartridge-type filters for swimming pools; and Standard 47 - Flow through chemical feeding equipment.