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Check Valves and Backflow Preventers

138 results found that include 138 Products

Check valves and backflow preventer valves help protect potable water supplies from contamination due to the reverse flow of polluted water due to backsiphonage and backpressure. Some valves feature good chemical resistance and are suitable for use in heating applications. Sanitary check valves are suitable for food handling and processing industries to prevent the backflow of liquids. Spring check valves are designed to assist closure pressure to create a positive shutoff. Vacuum breakers help prevent backsiphonage of contaminated water into a water supply and many are suitable for use in hot or cold water service. Backflow preventer test kits allow you to test backflow preventers for correct operation, while backflow preventer repair kits let you perform preventative maintenance to help reduce valve failure. Go to Grainger for the check valves and backflow preventer valves ideal for your specific use.Close

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  • Check Valve,  3/4",  Single,  Y Swing,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 3/4", Single, Y Swing, Bronze, FNPT x FNPT

    Item # 13N4411

    Web Price
    $61.75 / each
  • Check Valve,  1-1/2",  Single,  Y Swing,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1-1/2", Single, Y Swing, Bronze, FNPT x FNPT

    Item # 13N4441

    Web Price
    $129.00 / each
  • Check Valve,  1-1/2",  Single,  Y Swing,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1-1/2", Single, Y Swing, Bronze, FNPT x FNPT

    Item # 13N4541

    Web Price
    $164.00 / each
  • Check Valve,  2",  Single,  Y Swing,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 2", Single, Y Swing, Bronze, FNPT x FNPT

    Item # 13N4451

    Web Price
    $188.50 / each
  • Check Valve,  1",  Single,  Y Swing,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1", Single, Y Swing, Bronze, FNPT x FNPT

    Item # 1JLX91

    Web Price
    $114.50 / each
  • Check Valve,  3/4",  Single,  Inline Spring,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 3/4", Single, Inline Spring, Bronze, FNPT x FNPT

    Item # 5EMY71

    Web Price
    $43.30 / each
  • Check Valve,  1-1/2",  Single,  Inline Spring,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1-1/2", Single, Inline Spring, Bronze, FNPT x FNPT

    Item # 5EMZ01

    Web Price
    $98.50 / each
  • Check Valve,  2",  Single,  Inline Swing,  Brass,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 2", Single, Inline Swing, Brass, FNPT x FNPT

    Item # 12K6511

    Web Price
    $162.50 / each
  • Check Valve,  2",  Single,  Inline Swing,  Cast Iron,  Flange x Flange

    MILWAUKEE VALVE

    Check Valve, 2", Single, Inline Swing, Cast Iron, Flange x Flange

    Item # 1JNL31

    Web Price
    $159.00 / each
  • Check Valve,  1",  Single,  Inline Spring,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1", Single, Inline Spring, Bronze, FNPT x FNPT

    Item # 5EMY81

    Web Price
    $68.75 / each
  • Check Valve,  4",  Single,  Inline Swing,  Cast Iron,  Flange x Flange

    MILWAUKEE VALVE

    Check Valve, 4", Single, Inline Swing, Cast Iron, Flange x Flange

    Item # 1JNL61

    Web Price
    $344.00 / each
  • Check Valve,  2",  Single,  Inline Spring,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 2", Single, Inline Spring, Bronze, FNPT x FNPT

    Item # 5EMZ11

    Web Price
    $142.00 / each
  • Check Valve,  1/2",  Single,  Y Swing,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1/2", Single, Y Swing, Bronze, FNPT x FNPT

    Item # 13N4401

    Web Price
    $48.95 / each
  • Check Valve,  1",  Single,  Y Swing,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1", Single, Y Swing, Bronze, FNPT x FNPT

    Item # 13N4521

    Web Price
    $95.00 / each
  • Check Valve,  1/2",  Single,  Inline Spring,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1/2", Single, Inline Spring, Bronze, FNPT x FNPT

    Item # 5EMY61

    Web Price
    $32.50 / each
  • Check Valve,  1-1/4",  Single,  Inline Spring,  Bronze,  FNPT x FNPT

    MILWAUKEE VALVE

    Check Valve, 1-1/4", Single, Inline Spring, Bronze, FNPT x FNPT

    Item # 5EMY91

    Web Price
    $76.00 / each