Backflow Prevention Valves

Includes from the small Watts 9D models for boiler service, to the large RPZ (Reduced Pressure Zone) backflow preventers (Watts models 009 and 909) for a wide range of plumbing and heating applications. Also includes air gaps, RPZ Tesing Kits and repair kits.

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  1. Watts In-Line Backflow Preventer, No. N9, 1/4" NPT

    Watts In-Line Backflow Preventer, No. N9, 1/4" NPT

    SKU: WC1015

    Number N9 1/4" IPFxIPF in-line backflow preventor with atmospheric vent. All brass double check design protection against back-siphonage in continuous pressure applications.Maximum pressure 125lbs. Learn More
    $109.85
  2. Watts In-Line Backflow Preventer, No. N9, 3/8" NPT

    Watts In-Line Backflow Preventer, No. N9, 3/8" NPT

    SKU: WC1020

    Number N9 3/8" IPFxIPF in-line backflow preventor with atmospheric vent. All brass double check design protection against back-siphonage in continuous pressure applications. Maximum pressure 125lbs. Learn More
    $109.85
  3. Watts Backflow Preventer, No. 9D, 1/2" NPT

    Watts Backflow Preventer, No. 9D, 1/2" NPT

    SKU: WC1025

    Number 9D backflow preventor, 1/2" female union on inlet and outlet connections. Intermediate atmospheric vent. All brass with stainless steel parts, integral strainer and rubber discs. Design protection against back-siphonage in continuous pressure applications including process tanks, sterilizers and low hazard applications. For boiler feed lines to prevent backflow when supply pressure falls below system pressure. Maximum pressure 175lbs. Learn More
    $48.00
  4. Watts Backflow Preventer, No. 9D, 3/4" NPT

    Watts Backflow Preventer, No. 9D, 3/4" NPT

    SKU: WC1030

    Number 9D backflow preventor, 3/4" female union on inlet and outlet connections. Intermediate atmospheric vent. All brass with stainless steel parts, integral strainer and rubber discs. Design protection against back-siphonage in continuous pressure applications including process tanks, sterilizers and low hazard applications. For boiler feed lines to prevent backflow when supply pressure falls below system pressure. Maximum pressure 175lbs. Learn More
    $48.00
  5. Watts Backflow Preventer for Water Meter, No. 7

    Watts Backflow Preventer for Water Meter, No. 7

    SKU: WC1040

    Number 7 dual check backflow preventor, 1" female union on inlet and 1"IPF outlet connections. All brass with stainless steel parts and two compact replaceable check modules. Design protection against back-siphonage in residential water supply service. To be installed immediately downstream of the water meter. Learn More
    $66.90
  6. Watts Backflow Preventer, No. 007QT, 3/4" NPT

    Watts Backflow Preventer, No. 007QT, 3/4" NPT

    SKU: WC1455

    007QT 3/4"NPT Backflow Preventer. This type is a double check valve assembly for non-health, low hazard cross-connections and continuous pressure applications. Furnished with ball type test cocks and quarter turn, full port bronze ball valves for shut-offs. Supply pressures up to 175PSI and temperatures of 140 degrees F. Learn More
    $128.98
  7. Watts Backflow Preventer, No. 007QT, 1" NPT

    Watts Backflow Preventer, No. 007QT, 1" NPT

    SKU: WC1460

    007QT 1"NPT Backflow Preventer. This type is a double check valve assembly for non-health, low hazard cross-connections and continuous pressure applications. Furnished with ball type test cocks and quarter turn, full port bronze ball valves for shut-offs. Supply pressures up to 175PSI and temperatures of 140 degrees F. Learn More
    $196.42
  8. Watts Backflow Preventer, No. 007QT, 1-1/2" NPT

    Watts Backflow Preventer, No. 007QT, 1-1/2" NPT

    SKU: WC1465

    007QT 1-1/2"NPT Backflow Preventer. This type is a double check valve assembly for non-health, low hazard cross-connections and continuous pressure applications. Furnished with ball type test cocks and quarter turn, full port bronze ball valves for shut-offs. Supply pressures up to 175PSI and temperatures of 140 degrees F. Learn More
    $363.63
  9. Watts Backflow Preventer, No. 709NRS, 2-1/2" Flanged

    Watts Backflow Preventer, No. 709NRS, 2-1/2" Flanged

    SKU: WC1475

    Number 709NRS 2-1/2" 125lb Flanged Backflow Preventer. This type is a double check valve assembly for non-health, low hazard cross-connections and continuous pressure applications. Furnished with ball type test cocks and non-rising gate valves for shut-offs. Supply pressures up to 175PSI and temperatures of 110 degrees F. Learn More
    $2,223.00
  10. Watts Backflow Preventer, No. 709NRS, 3" Flanged

    Watts Backflow Preventer, No. 709NRS, 3" Flanged

    SKU: WC1480

    Number 709NRS 3" 125lb Flanged Backflow Preventer. This type is a double check valve assembly for non-health, low hazard cross-connections and continuous pressure applications. Furnished with ball type test cocks and non-rising gate valves for shut-offs. Supply pressures up to 175PSI and temperatures of 110 degrees F. Learn More
    $2,320.00
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