Pressure Reducing Valves and Backflow Prevention Device/Assemblies – General Specifications
Pressure reducing valves reduce the water pressure and are used where the water pressure coming into building from the public water system is at a pressure greater than allowed by the plumbing codes. Pressure reducing valves are typically required where the supply pressure is greater than 80 psi. The pressure reducing valves has the same effect as a check valve. They are made out of sturdy material, such as brass, to withstand the force that they are constantly under and come in a variety of sizes. The purpose of this device is to reduce static and flowing pressures in domestic water supply stems. Water entering the pressure reducing valve from the public water system distribution system is constricted within the valve body and directed through the inner chamber controlled by an adjustable spring loaded diaphragm and disc. The pressure reducing valve should be installed where it is accessible with sufficient clearance for cleaning, service or adjustment. The pressure reducing valve is designed so that the internal screen that protects the critical features of the valve can be cleaned without having to remove it from the piping system. Pressure regulators valve may be installed vertically or horizontally with the arrow pointing in the direction of flow. The pressure regulator valve shall be compliant with ASSE Standard 1003.