Combination Boiler Feed and Backflow Valve; Type Union; Applicable Standard ASSE 1081; Nominal Size 1/2"; End Connection Threaded x Union Threaded; End to End Distance 3-1/2"; Body Material Forged Brass; Downstream Pressure Range 10 to 50 PSI; Standard Factory Setting 12 PSI; Strainer Supplied Yes; Temperature Rating 210 Deg F; Pressure Rating 150 PSI Inlet Maximum; Inclusions/Features Adjustable Indicator, Boiler Feed Valve, Backflow Service Cap, Dial In Pressure Setting, Dual Check Backflow Preventer, internal check valve, Purge Auto Reset, Pressure Reducing Cartridge, EPDM Gasket; Application Hydronic Heating System; Strainer Material Stainless Steel; Flow Rate 25 GPM