0792076 (Watts) | 3/8 Inch | Lead Free Dual Check Valve Backflow Preventer | Cast Copper Silicon AlloyThis 3 8 Inch Dual Check Valve Backflow Preventer Helps Prevent The Reverse Flow of Polluted Water From Entering Into The Drinking Water Supply at The Service Entrance or at Individual Outlets. It is Designed For In Line Continuous Pressure Applications, Such as Wash Down Sinks or Other Installations, Where a Hose Type Device Connected to The Domestic Water Supply Can be Submerged Into a Non Potable Liquid. It Consists of a Lead Free Cast Copper