Caleffi 573403A Backflow Preventer

Backflow Preventer; Type Dual Check Continuous Pressure, Pressure Reducing Valve; Nominal Size 1/2 Inch; End Connection Female Threaded Union x Female Threaded Union; End to End Distance 4-3/4 Inch; Body Material Brass; Disc/Poppet Material Stainless Steel; Spring Material Stainless Steel; Seat Material Polymer; Seal Material EPDM; Flow Rate 5-1/2 GPM; Temperature Rating 32 to 250 Deg F; Pressure Rating 175 PSI; Inclusions/Features Stainless Steel Filter, EPDM Diaphragm and Seal, Brass Check Valve; Application Plumbing and Hydronic; Applicable Standard ASSE 1012, CSA B64.3, NSF 372, ICC-ES, IPC, IRC, UPC, ANAB, FM, ICIM, ISO 9001; Lead-Free