0886027 (Watts) | 1/2 - 1 Inch | 800 PVB Check Repair KitThis Check Repair Kit For a Pressure Vacuum Breaker Prevents The Reverse Flow of Polluted Water From Entering Into The Potable Water Supply Due to Backsiphonage. This Check Repair Kit For a Pressure Vacuum Breaker Prevents The Reverse Flow of Polluted Water From Entering Into The Potable Water Supply Due to Backsiphonage. This Kit Consists of a Check Disc Assembly (Disc Holder, Disc, Washer, Guide And Screw), Bonnet O Ring And Check Spring. Watts