Plumbing Watts Double Check Detector Assemblies | Lfrk 709-Ck4 6 Fourth Check Repair Kit

This Fourth Check Valve Kit Is Used To Repair Or Replace The Fourth Check Valve On A 6 Inch Lead Free Double Check Valve Assembly And Used To Prevent The Reverse Flow Of Polluted Water From Entering Into The Potable Water Supply. This Kit Consists Of A Disc And Spring Assembly And A Cover O-Ring. It Is Ideal At Referenced Cross-Connections Identified In Non-Health Hazard Applications.