Series 4000SS Reduced Pressure Zone Assemblies prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. It consists of a stainless steel body construction with stainless steel internal parts. The bottom-mounted relief valve is located between the two check valves, making it suitable for installations against an outside wall. Series 4000SS has a compact design with a short lay length, ideal for retrofit installations. The 4000SS is designed for health hazard applications. Check with local water authorities for installation requirements. Maximum Working Pressure: 175psi (12.06 bar). Features: Short end-to-end dimensions make retrofit easy, Stainless steel construction for maximum strength and corrosion resistance, Stainless steel relief valve features balanced rolling diaphragm to reduce maintenance costs and eliminate sliding seats, Cam-check assembly provides low head loss.

Apollo Valves 4ALF-200 Reduced Pressure Backflow Preventer, 1/2 Inch FNPT, Ball Shutoff Valve, Standard Strainer, 175 psi

Watts® 957-NRS 0111604 Reduced Pressure Zone Backflow Preventer With NRS Gate Valves, Grooved, 175 psi, 33 - 140 deg F, Stainless Steel

Wilkins 375 Series Reduced Pressure Backflow Preventer With NRS Gate Valves, 2-1/2 Inch, Flanged, 350 psi, Ductile Iron Body, 140 deg F

Apollo Valves 4ALF-200 Reduced Pressure Backflow Preventer, 3/4 Inch FNPT, Ball Shutoff Valve, Standard Strainer, 175 psi

Wilkins 375 Series Reduced Pressure Backflow Preventer With NRS Gate Valves, 4 Inch, Flanged, 350 psi, Ductile Iron Body, 140 deg F

Watts® LF009M2-QT Reduced Pressure Backflow Preventer, 1-1/2 Inch, NPT, 175 psi, 33 - 180 deg F, Cast Copper Silicon Alloy

Watts® 957-NRS 0111603 Reduced Pressure Zone Backflow Preventer With NRS Gate Valves, Grooved, 175 psi, 33 - 140 deg F, Stainless Steel

Wilkins 375 Series Reduced Pressure Backflow Preventer With NRS Gate Valves, 3 Inch, Flanged, 350 psi, Ductile Iron Body, 140 deg F