Series 826YD DuraCheck In-Line Design Reduced Pressure Detector Assemblies are used to protect against high hazard (toxic) fluids in water services to industrial plants, hospitals, morgues, mortuaries, and chemical plants. They are also used in irrigation systems, boiler feed, water lines and other installations requiring maximum protection and detection of unauthorized water use. They feature a ductile iron body and OSY shutoff valves. Maximum Working Pressure: 175psi (12.1 bar).