Watts 757 NRS GXG 8 Part of the 757 Series chat hdpe This polyethylene sheeting features an This polyethylene sheeting features an internal scrim reinforcement that enhances its resistance to tearing and punctures This 2 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements non rising stem resilient seated gate valves with grooved end connections 10 Maximum Working Pressure PSI 175 Meter Type No Meter Minimum Temperature Celsius 1