This 3/4 Inch Lead Free Dual Check Vacuum Breaker Backflow Preventer With Atmospheric Vent Prevent High-Hazard Backsiphonage Backflow And Low-Head Backpressure (10 FT or Less) From Contaminating The Potable Water Supply. It Prevents Backflow Associated With Hose Connections When Screwed Directly to a Sill Cock, Yard Hydrant, or Wall Hydrant. It Consists of a Lead Free Brass Body With Two Independently Operating Rubber And Stainless Steel Check Valves, With an Atmospheric Vent Located Between The Them. It is In-Line Field Testable, Non-Removable And Designed For Non-Continuous Pressure Applications. It is Ideal For Installation in Service Sinks, Chemical Dispensers, Sill Cocks, And Frost Proof Hydrants. Maximum Working Pressure is 125 psi (10.6 Bar). | Watts | 0792099