Historical
ANSI/APSP 4-2007
Standard for Aboveground/Onground Residential Swimming Pools
Revision of requirements for suction entrapment avoidance to be in compliance with APSP-7 Standard for Suction Entrapment Avoidance in Swimming Pools, Wading Pools, Soas, Hot Tubs, and Catch Basins.
APSP: Association of pool and spa professionals [apsp]