4000906 (Apollo-Conbraco) | 2-1/2 - 3 Inch | 40-200 RP/40-700 Rpda Relief Valve Rubber KitApollo Conbraco 2 1 2 to 3 Inch Relief Valve Rubber Kit For The 40 200 Reduced Pressure Zone or 40 700 Reduced Pressure Detector Series. Kit Includes: Relief Valve Diaphragm, Relief Valve Seat Disc, RV Bushing O Ring, RV Stem O Ring, Seat O Ring, Small RV Body O Ring, Large RV Body O Ring Apollo Conbraco 4000906