Watts Series 909M1QT Reduced Pressure Zone Backflow Preventer 1-1/4" (0385717)

«  ↑  » Watts Series 909M1QT Reduced Pressure Zone Backflow Preventer 1-1/4" (0385717) Watts Series 909M1QT Reduced Pressure Zone Backflow Preventer 1-1/4" (0385717) Watts Series 909QT Reduced Pressure Zone Backflow Preventer Sizes: 3/4", 1" (20, 25mm) - 909 Sizes: 1-1/4", 1-1/2", 2" (32, 40, 50mm) - 909-M1 The Watts 909 Series Reduced Pressure Zone Backflow Preventers are designed to provide superior cross-connection control protection of the potable water supply in accordance with national plumbing codes and containment control for water authority requirements. This series can be utilized in a variety of installations, including health hazard cross-connections in plumbing systems or for containment at the service line entrance. With its exclusive, design incorporating the patented "air-in/water-out" principle it provides maximum relief valve discharge during the emergency conditions of combined back-siphonage and back-pressure with both checks fouled. No. 909-QT, standardly furnished with full port, resilient seated and bronze ball valve shutoffs. Sizes 3/4" and 1" (20, 25mm) shutoffs have tee handles. FEATURES: Modular design, Replaceable bronze seats, Compact for installation ease, Horizontal or vertical (up or down) installation, No special tools required for servicing. PRESSURE - TEMPERATURE: Model 909 suitable for supply pressures up to 175 psi (12.1 bars) and water temperatures to 140°F (60°C) continuous and 180°F (82°C) intermittent. MATERIALS: Bronze body construction - Model 909 Celcon® check seats, Model 909HW premium-grade stainless steel check seats - premium-grade stainless steel relief valve seats, shafts and flange bolts - ultra-sturdy tight seating, rubber check valve and relief valve assemblies. Bronze body test cocks.