0794053 (Watts) | 2-1/2 - 3 Inch | 009 Lead Free RP Relief Valve Rubber Repair KitThis Relief Valve Rubber Parts Kit is Used For Repairing The Parts on a Relief Valve For a 2 1 2 And 3 Inch Lead Free 009 Reduced Pressure Zone Assembly Which is Used to Prevent The Reverse Flow of Polluted Water From Entering Into The Potable Water Supply Due to Backsiphonage And or Backpressure. This Kit Consists of a Diaphragm, Disc, Molded Disc Assembly, Piston O Ring, Stem O Ring And Cover O Ring. Watts 0794053