Zurn Wilkins 975XL, 3/4″ Reduced Pressure Principle Backflow PreventerCondition:* New Surplus Stock, In OEM Packaging. Open Box * Box Has Minor Cosmetic Damage From Storage & Transport.* As Pictured.Additional Notes:* Size: 3/4″* Max. Working Water Pressure: 175 PSI* Max. Working Water Temperature: 180F* Hydrostatic Test Pressure: 350 PSI* For Installation On Water Lines To Protect Against Both Backsiphonage And Backpressure of Contaminated Water Into The Potable Water Supply.* For Non-Potable Applications Only.* Materials: Main Valve Body: Cast Bronze Access Covers: Cast Bronze ASTM B 584 Fasteners: Stainless Steel, 300 Series Elastomer: Silicone, Buna Nitrile Polymers: Noryl Springs: Stainless Steel, 300 Series* Ball Valves* Standards Compliance: ASSE Listed 1013 cUPC Listed UL Classified (less shut-off valves or with OS&Y valves C-UL Classified CSA Certified B64.4 AWWA compliant C511 Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California NYC MEA 425-89-M VOL 3Zurn Wilkins34-975XL