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  1. Febco 860 RPZ Backflow Preventer 1" FPT | FE860-100
    Febco 860 1in. RPZ Backflow Preventer FPT | FE860-100
    On-Sale $320.07 List Price $798.95
    HLSG SKU: FEB860010
    SKU: FE860-100
  2. Conbraco 4A-200 RPZ Backflow Preventer 1" FPT | CDC4A-205-A2F
    Conbraco 4A-200 RPZ Backflow Preventer 1 in. FPT | CDC4A-205-A2F
    On-Sale $355.39 List Price $466.95
    HLSG SKU: CNB4A205A2F
    SKU: CDC4A-205-A2F
  3. Febco 825Y RPZ Backflow Preventer 2 in. FPT | FE825Y-200
    Febco 825Y RPZ Backflow Preventer 2 in. FPT | FE825Y-200
    On-Sale $1,120.20 List Price $2,129.95
    HLSG SKU: FEB825Y020
    SKU: FE825Y-200
  4. Conbraco 4A-200 RPZ Backflow Preventer 3/4" FPT | CDC4A-204-A2F
    Conbraco 4A-200 RPZ Backflow Preventer 3/4 in. FPT | CDC4A-204-A2F
    On-Sale $319.25 List Price $498.95
    HLSG SKU: CNB4A204A2F
    SKU: CDC4A-204-A2F
  5. Febco 825YA Angle RPZ Backflow Preventer 1 in. FPT | FE825YA-100
    Febco 825YA Angle RPZ Backflow Preventer 1 in. FPT | FE825YA-100
    On-Sale $791.90 List Price $1,163.95
    HLSG SKU: FEB825YA010
    SKU: FE825YA-100
  6. Febco 825Y RPZ Backflow Preventer 3/4 in. FPT | FE825Y-075
    Febco 825Y RPZ Backflow Preventer 3/4 in. FPT | FE825Y-075
    On-Sale $515.15 List Price $843.95
    HLSG SKU: FEB825Y007
    SKU: FE825Y-075
  7. Wilkins RPZ Lead-Free Backflow Preventer 2 in. FNPT x FNPT | 2-975XL2
    Wilkins RPZ Lead-Free Backflow Preventer 2 in. FNPT x FNPT | 2-975XL2
    On-Sale $1,807.99 List Price $2,259.99
    HLSG SKU: WLK975XL020LF
    SKU: 2-975XL2
  8. Conbraco 4A-200 RPZ Backflow Preventer 1-1/2 in. | CDC4A-207-A2F
    Conbraco 4A-200 RPZ Backflow Preventer 1-1/2 in. | CDC4A-207-A2F
    On-Sale $662.80 List Price $1,025.95
    HLSG SKU: CNB4A207A2F
    SKU: CDC4A-207-A2F
  9. Conbraco 4A-200 RPZ Backflow Preventer 2 in. Union End Ball Valve | CDC4A-208-A2F
    Conbraco 4A-200 RPZ Backflow Preventer 2 in. Union End Ball Valve | CDC4A-208-A2F
    On-Sale $733.10 List Price $1,196.95
    HLSG SKU: CNB4A208A2F
    SKU: CDC4A-208-A2F
  10. Febco U860 RPZ Backflow Preventer 1 in. Union End Ball Valve | FEU860-100
    Febco U860 RPZ Backflow Preventer 1 in. Union End Ball Valve | FEU860-100
    On-Sale $665.96 List Price $927.95
    HLSG SKU: FEB860U010
    SKU: FEU860-100
  11. Febco 860 RPZ Backflow Preventer 2 in. FPT | FE860-200
    Febco 860 RPZ Backflow Preventer 2 in. FPT | FE860-200
    On-Sale $764.72 List Price $1,425.95
    HLSG SKU: FEB860020
    SKU: FE860-200
  12. Febco 825YA Angle RPZ Backflow Preventer 2 in. FPT | FE825YA-200
    Febco 825YA Angle RPZ Backflow Preventer 2 in. FPT | FE825YA-200
    On-Sale $1,627.67 List Price $2,173.95
    HLSG SKU: FEB825YA020
    SKU: FE825YA-200
  13. Wilkins 375 RPZ Backflow Preventer 1 in. FPT | WK375-100
    Wilkins 375 RPZ Backflow Preventer 1 in. FPT | WK375-100
    On-Sale $568.99 List Price $834.95
    HLSG SKU: WLK375010
    SKU: WK375-100
  14. Febco 825Y RPZ Backflow Preventer 1 in. FPT | FE825Y-100
    Febco 825Y RPZ Backflow Preventer 1 in. FPT | FE825Y-100
    On-Sale $525.25 List Price $1,057.95
    HLSG SKU: FEB825Y010
    SKU: FE825Y-100
  15. Febco 825YA Angle RPZ Backflow Preventer 3/4 in. FPT | FE825YA-075
    Febco 825YA Angle RPZ Backflow Preventer 3/4 in. FPT | FE825YA-075
    On-Sale $741.58 List Price $1,198.95
    HLSG SKU: FEB825YA007
    SKU: FE825YA-075
  16. Febco 860 RPZ Backflow Preventer 3/4" FPT | FE860-075
    Febco 860 RPZ Backflow Preventer 3/4 in. FPT | FE860-075
    On-Sale $458.36 List Price $740.95
    HLSG SKU: FEB860007
    SKU: FE860-075
  17. Wilkins 975XL RPZ Backflow Preventer 1 in. FPT | WK975XL-100
    Wilkins 975XL RPZ Backflow Preventer 1 in. FPT | WK975XL-100
    On-Sale $666.99 List Price $977.95
    HLSG SKU: WLK975XL010
    SKU: WK975XL-100
  18. Febco 825Y RPZ Backflow Preventer 1-1/2 in. FPT | FE825Y-150
    Febco 825Y RPZ Backflow Preventer 1-1/2 in. FPT | FE825Y-150
    On-Sale $1,125.25 List Price $1,687.95
    HLSG SKU: FEB825Y015
    SKU: FE825Y-150
  19. Wilkins 975XL RPZ Backflow Preventer 3/4 in. FPT | WK975XL-075
    Wilkins 975XL RPZ Backflow Preventer 3/4 in. FPT | WK975XL-075
    On-Sale $627.99 List Price $906.95
    HLSG SKU: WLK975XL007
    SKU: WK975XL-075
  20. Wilkins 375 RPZ Backflow Preventer 3/4 in. | WK375-075
    Wilkins 375 RPZ Backflow Preventer 3/4 in. | WK375-075
    On-Sale $450.35 List Price $640.00
    HLSG SKU: WLK375007
    SKU: WK375-075
  21. Conbraco 4A-200 RPZ Backflow Preventer 1 in. Union End Ball Valve | CDC4A-205-A4F
    Conbraco 4A-200 RPZ Backflow Preventer 1 in. Union End Ball Valve | CDC4A-205-A4F
    On-Sale $446.88 List Price $837.95
    SKU: CDC4A-205-A4F
  22. Wilkins RPZ Lead-Free Backflow Preventer 1 in. FNPT x FNPT | 1-975XL2
    Wilkins RPZ Lead-Free Backflow Preventer 1 in. FNPT x FNPT | 1-975XL2
    On-Sale $930.99 List Price $1,163.74
    HLSG SKU: WLK975XL010LF
    SKU: 1-975XL2
  23. Wilkins 975XL RPZ Backflow Preventer 2 in. FPT | WK975XL-200
    Wilkins 975XL RPZ Backflow Preventer 2 in. FPT | WK975XL-200
    On-Sale $1,368.89 List Price $2,210.95
    HLSG SKU: WLK975XL020
    SKU: WK975XL-200
  24. Febco 860 RPZ Backflow Preventer 1-1/2" FPT | FE860-150
    Febco 860 RPZ Backflow Preventer 1-1/2 in. FPT | FE860-150
    On-Sale $768.88 List Price $1,641.95
    HLSG SKU: FEB860015
    SKU: FE860-150
  25. Febco U860 RPZ Backflow Preventer 1-1/2" Union End Ball Valves | FEU860-150
    Febco U860 RPZ Backflow Preventer 1-1/2 in. Union End Ball Valve | FEU860-150
    On-Sale $1,128.00 List Price $1,899.95
    HLSG SKU: FEB860U015
    SKU: FEU860-150
  26. Febco U860 RPZ Backflow Preventer 3/4 in. Union End Ball Valve | FEU860-075
    Febco U860 RPZ Backflow Preventer 3/4 in. Union End Ball Valve | FEU860-075
    On-Sale $729.41 List Price $1,399.95
    HLSG SKU: FEB860U007
    SKU: FEU860-075
  27. Wilkins Wilkins RPZ Lead-Free Backflow Preventer 3/4 in. FNPT x FNPT | 34-975XL2
    Wilkins Wilkins RPZ Lead-Free Backflow Preventer 3/4 in. FNPT x FNPT | 34-975XL2
    On-Sale $879.99 List Price $1,099.99
    HLSG SKU: WLK975XL007LF
    SKU: 34-975XL2
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How Does an RPZ Work?

A Reduced Pressure Zone (RPZ) Assembly uses a combination of check valves and relief valves to prevent backflow in an irrigation system. These allow water to flow in only one direction: from the potable water supply to the system. If backpressure occurs, the first check valve closes, preventing contaminated water from flowing back into the potable supply. If the first check valve leaks, then a relief valve opens up to release water and ensure contaminants don’t reach the supply line.

 

RPZ Valve FAQs

Why is an RPZ required for sprinkler systems?

Backflows are necessary to protect your potable water. Sprinkler systems often contain contaminants like fertilizers, pesticides, or stagnant water. An RPZ prevents these substances from entering the drinking water supply due to backpressure or backsiphonage.

What is the difference between an RPZ and other backflow preventers?

RPZ Assemblies offer the highest level of protection against backpressure, and are suitable for systems with health hazard risks. Double Check Valves provide moderate protection and are used for low- to medium-risk systems. Finally, Atmospheric or Pressure Vacuum Breakers protect against backsiphonage only and are used in simpler systems without high risks.

Where should an RPZ assembly be installed?

An RPZ should be installed upstream of the sprinkler system, between the system and the potable water supply. Try to choose a location that is accessible for maintenance and testing. Install the RPZ valve above ground, and in a weather-protected area to prevent freezing.

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