This 2 1/2" Watts Magnum(TM) 20G double check valve backflow preventer assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backflow due to backpressure and/or backsiphonage conditions. Magnum 20G features inline serviceable NRS gate valves, a stainless steel body, and Dual-Action(TM) checks for high performance at low-and high-flow rates. It may be installed under continuous pressure service to protect against both backpressure and backsiphonage. Maximum working pressure is 175psi (12 bar).

• Resilient seated NRS shutoff valves
• Dual-action check modules for low-and high-flow performance
• Stainless Steel Body
• Tamper-resistant test cocks