117th Backflow Preventers W50S6M-25-Q-A017

Provide a 10-inch backflow prevention assembly (or equal) to be used on water lines in fire protection systems, specifically a Reduced Pressure Detector Backflow Prevention Assembly (ZURN WILKINS Model 375DA) or an equivalent that meets the stated specs. The unit must be sized 10 inches, handle up to 175 psi maximum working pressure and 140°F maximum temperature, with a hydrostatic test pressure of 350 psi. End connections should accommodate grooved steel pipe (AWWA C606) or a flange bolt pattern (ASME B16.42). It must be certified to NSF/ANSI/CAN 61 and ASSE Listed 1047, and supplied with full-port OS&Y gate valves. The device’s main body and access cover shall be epoxy-coated ductile iron (ASTM A536); the seat ring and check valve shall be NORYL; the stem stainless steel (ASTM A276); and the seat disc elastomers EPDM. Checks and the relief valve must be accessible for maintenance without removing the device from the line, and the assembly should include a metered by-pass to detect leaks and unauthorized water use.

Designed to protect the potable water supply from both back siphonage and back pressure, the model is intended where a potential health hazard exists and is used on fire protection system water lines. The product shall be a ZURN WILKINS Model 375DA or an equivalent that meets all specified performance, material, and certification requirements, with details available in the Purchase Description.