Watts 774DCDA DOSY GPM 6 Part of the 774DCDA Series Egress System Z320 1IC C Z320 1IC C 2 Body Material Lead Free Copper Silicon Alloy Brand Watts Buy American Act Compliant NO Corrosion Resistant Coating No Disc Material EPDM EAN 098268177602 Gauge Option Gauge Tapping & Gauge High Pressure Reduced Pressure Range Does Not Apply To Product High Pressure Reduced Pressure Setting Does Not Apply To Product Inlet Connection Size 1 2 IN Inlet Connection Type Union Press Inlet Thread Type Does Not Apply To Product Lead Free YES Maximum Operating Temperature Fahrenheit 180 Maximum Working Pressure BAR 20 This 6 inch double check detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements and a gallons per minute metered bypass to detect underground leaks and unauthorized water use