Product Overview

The Westlake KIT40601S 4" Wafer Check Valve Contractor Kit delivers everything required for a secure backflow prevention install in a single part number, integrating a 601N Series valve, two PVC Van Stone loose-ring flanges, and a precisely cut 304 stainless steel hardware set.

Built with a corrosion-resistant PVC body and EPDM sealing components, this compact wafer valve slides directly between compatible ANSI Schedule 80 flanges. Its wafer-style profile demands minimal pipe clearance while sustaining a 145 PSI working pressure under non-shock water conditions at 73°F, alongside a 29.9 inch mercury vacuum rating. An internal 316 stainless steel spring controls disc movement, effectively damping slamming action to significantly reduce water hammer during rapid flow reversals.

Engineered for reliable horizontal or vertical mounting across commercial pool, spa, and industrial water-handling systems, the valve supports straightforward O-ring replacement for extended serviceability. The lightweight 7 lb assembly ships packaged efficiently and pairs heavy-duty fasteners with low-profile PVC fittings for hassle-free handling. When verifying EPDM chemical compatibility with your target fluid and applying anti-seize compound to the threaded bolts, this contractor package eliminates multi-SKU tracking while guaranteeing matched component tolerances backed by a 3-year manufacturer warranty.