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RP-500-075 - 3/4" A.R.I. Reduce Pressure Assembly Backflow Preventer

  • Compact and Light Weight
  • UV Resistant
  • Theft Resistant
  • Lead Free
Item #: RP-500-075
Availability: In Stock
Usually ships In 1-2 Business Days
Retail: $443.00
Price: $199.35

You Save: $243.65 (55.0%)

    In Stock Quantity: 3

    The RP-500 Backflow Preventer is designed to supply maximum protection against backflow caused by negative pressure or backpressure.  Backflow may cause infiltration of chemicals, fertilizers and/or other pollutants into potable water systems. The RP-500 is reliable and easily maintained, without the need for special tools.  The RP-500 is built with two independent, easily replaceable encapsulated spring-loaded check valves.  A revolutionary, internal Reduced Pressure Zone, located between the check valves, ensures protection and reliable performance of the relief valve.

    During normal flow, the two check valves open to supply water downstream. The Relief Valve is power-activated by upstream pressure and is kept shut by a diaphragm, through the internal control system.   In the zone, the area between the check valves, pressure is maintained at approximately 0.43 bar lower than the water supply pressure. The Outlet Check Valve is spring-loaded to maintain a minimum pressure decrease of 0.07 bar.   When negative pressure or sub-atmospheric conditions occur, the Inlet Check Valve closes to prevent backflow.  If the Outlet Check Valve fails, the pressure between the two check valves rises, opening the Relief Valve and releasing the water to the atmosphere.  The Relief Valve operates on differential pressure. Supply pressure on the upstream side of the Inlet Check Valve acts against the diaphragm to close the Relief Valve during normal operation.  In the event of backpressure or backsiphonage, the Relief Valve will open to maintain the pressure in the “zone” at 0.14 bar less than the inlet pressure.