See all products of Reduced Pressure Principle (RP) FlowShield™ RP, Testable backflow preventer assembly (1/2") FlowShield™ RP, Testable backflow preventer assembly (3/4") FlowShield™ RP, Testable backflow preventer assembly (1") Flowshield™ RP, Testable backflow preventer assembly (1 1/4") Flowshield™ RP, Testable backflow preventer assembly (1 1/2") FlowShield™ RP, Testable backflow preventer assembly (2") FlowShield™, Valve seat (¾") FlowShield™, Upstream check valve Downstream check valve FlowShield™, Discharge valve assembly