Febco LF856DCDA OSY CFM 3 Part of the LF856 Series roof hatch finder Durable Construction & Wet Area Compatibility: Durable Construction & Wet Area Compatibility: Engineered with moisture resistant materials built to withstand daily use in wet environments Suitable for plaza decks This 3 inch lead free MasterSeries® double check detector backflow preventer assembly prevents the backflow of pollutants due to backsiphonage and or backpressure that are objectionable but not toxic 2 MM Inlet Connection Type Flanged Joint Inlet Shutoff Valve Type Outside Stem And Yoke Gate Valve Lead Free YES Maximum Temperature Fahrenheit 140 Maximum Working Pressure BAR 12