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Irrigation, Drainage and Landscape Lighting
Apollo 1" 4A Reduced Pressure Assembly - RPZ
Made In The USA!
Stainless Steel Handles and Trim
Modular Cartridge Check
Out of Stock
You Save: $142.01 (40.0%)
Made in the USA!
The Apollo® Model RP4A series Reduced Pressure and RPLF4A Lead Free* Reduced Pressure Backflow Preventers provide maximum protection of the potable water supply due to back-siphonage or backpressure from substances that are hazardous to the potable water supply. The top accessed modular check valve cartridges provide captured springs, replaceable seats and reversible silicone seat discs. This Made in America assembly features Apollo® ball valves with stainless steel handles and nuts as standard.
The Reduced Pressure Principle (RP) device consists of two independently-acting, spring-loaded check valves, together with a hydraulically dependent, mechanically independent pressure differential relief valve, located in the zone between the check valves. Two resilient seated shut-o! valves and four test cocks complete the assembly. The first check is designed to maintain a minimum of 5 psi across the check valve. The second check is designed to maintain a minimum of 1 psi across the check valve during normal operation. The relief valve operates on a differential pressure. Supply pressure on the upstream side of the first check valve acts against the diaphragm to close the relief valve during normal operation. In the event of back-pressure, the relief valve will open to maintain the pressure in the “zone” at least 2 psi less than the inlet pressure. The flowing and no flow conditions are illustrated in Figures 1 and 2. A minimum supply pressure of 20 psig is normally required to fully shut the relief valve and open both checks.
Recommended Operating Pressure:
Apollo 4A RPZ Sell Sheet
Apollo 4A RPZ Spec Sheets
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