Conbraco DCDA Double Check Detector Assemblies offer low head loss and protect against cross-connection of non-hazardous water into safe drinking water systems. Because they can precisely monitor leakage or unauthorized use of water, they are an ideal fit for fire sprinkler pipelines and low hazard service, where metering of unauthorized water use is desired. Sized from 2 1/2 to 10 inches, the detector assemblies feature an FDA-approved epoxy-coated ductile iron body and bronze bypass. Fasteners and springs are stainless steel, mainline discs are EPDM, and bypass discs are made from silicone. Maximum working pressure is 175 psig; rated operating range is 33 to 140 degrees F.Conbraco.