Watts 909RPDA-OSY-CFM-FS 4 - Part of the 909RPDA Series ZA100F-4NH This second check repair kit

This second check repair kit provides all the parts necessary to repair or replace the second check on a 8 to 10 inch double check valve assembly backflow preventer

Features Copper alloy Bourdon sensing element

ZB400N-4IP

with ASTM F1960 compliant PEX end connections on the other

This 6 inch double check detector backflow preventer assembly prevents the backflow of fire protection system substances from being pumped or siphoned into the potable water supply

Watts 909RPDA-OSY-CFM-FS 4 - Part of the 909RPDA Series ZA100F-4NH This second check repair kitThis 4 inch reduced pressure detector backflow preventer assembly prevents the reverse flow of fire protection system substances from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure. This assembly consists of an epoxy coated cast iron body, OSY resilient seated gate valves, captured spring check valves, replaceable stainless steel seats, top mounted test cocks, a pressure differential relief valve,and