D-4020G (Apollo-Conbraco) | 4 Deringer 20 Osy (Dc) | Lead Free | Flanged X Flanged

This 4 Inch Ames Deringer(Tm) 20G Double Check Valve Backflow Preventer Assembly is Designed to Prevent Non-Health Hazard Pollutants From Entering The Potable Water Supply System Caused by Backflow Due to Backpressure And/Or Backsiphonage Conditions. Deringer 20G Features Inline Serviceable Os&Y Gate Valves, a Stainless Steel Body, And Dual-Action(Tm) Checks For High Performance at Low-And High-Flow Rates. It May be Installed Under Continuous Pressure Service to Protect Against Both Backpressure And Backsiphonage. Maximum Working Pressure is 175psi (12 Bar). | Apollo-Conbraco | D-4020G