This is the spring that is used with the diverter of the Waterway 1.5" Top Mount Sand Filter Valve. Specs: Mounting Style - Top Mount Plumbing Connection Size - 1-1/2" Valve Part Type - Spring Manufacturer - Waterway Models - WVS002, WVS003 Replaces: 4742-005 , 806105137982 , 827-0002