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    1. eBay
    2. Business & Industrial
    3. Hydraulics, Pneumatics, Pumps & Plumbing
    4. Valves & Manifolds
    5. Backflow Preventers
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    Backflow Preventers

    Side Refine Panel

    Shop by Category

    • Valves & Manifolds
    • Backflow Preventers
    • Air Control Valves
    • Air Pilot Valves
    • Ball Valves
    • Butterfly Valves
    • Cartridge Valves
    • Check & Foot Valves
    • Diaphragm Valves
    • Directional Control Valves
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    • Flow Dividers
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    • Shuttle Valves
      • Stop Valves
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      • Manifolds
      • Other Valves & Manifolds
    LessView less categories
    • Valve Operation

      • Air-Operated
      • Manual
      • Not Specified
    • Backflow Preventer Type

      • Double Check Assembly (DCA)
      • Reduced Pressure Zone (RPZ)
      • Not Specified
    • Pipe Size

      • 3/4 in
      • 1 in
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    • Condition

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    • Price

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    Shop by Pipe Size

    Showing slide {CURRENT_SLIDE} of {TOTAL_SLIDES} - Shop by Pipe Size

    • 1/2 in

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    • Time: ending soonest
    • Time: newly listed
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    List View

    1-48 of 219 Results

    • MID-WEST MODEL 835 - BACKFLOW PREVENTER TEST KIT

      MID-WEST MODEL 835 - BACKFLOW PREVENTER TEST KIT

      C $539.20
      C $67.79 shipping
      or Best Offer
    • New Watts 9D-M3 1/2 Backflow Preventer

      New Watts 9D-M3 1/2 Backflow Preventer

      C $31.72
      0 bids · Ending Saturday at 16:02 EST6d 11h
    • Midwest Instruments 830 Backflow Prevention Test Kit w/Hoses

      Midwest Instruments 830 Backflow Prevention Test Kit w/Hoses

      C $253.68
      C $45.29 shipping
    • Zurn Wilkins 34-375XL 3/4-Inch Lead Free Reduced Pressure Backflow Preventer

      Zurn Wilkins 34-375XL 3/4-Inch Lead Free Reduced Pressure Backflow Preventer

      C $240.00
    • WATTS 1/2 " 009-QT Reduced Pressure Zone Assembly

      WATTS 1/2 " 009-QT Reduced Pressure Zone Assembly

      C $295.00
      Only 1 left!
    • Watts 009M3-QT Reduced Pressure Backflow Preventer

      Watts 009M3-QT Reduced Pressure Backflow Preventer

      C $493.95
      Free shipping
    • ZURN-WILKINS REDUCED PRESSURE PRINCIPAL ASSEMBLY 2-375XL

      ZURN-WILKINS REDUCED PRESSURE PRINCIPAL ASSEMBLY 2-375XL

      C $650.00
      C $90.00 shipping
      or Best Offer
    • Watts Backflow Preventer No. 9 New without box

      Watts Backflow Preventer No. 9 New without box

      C $25.00
      or Best Offer
    • ZURN WILKINS 1” 950XL Double Check Backflow Preventer Valve w/ Isolation Valves

      ZURN WILKINS 1” 950XL Double Check Backflow Preventer Valve w/ Isolation Valves

      C $69.78
    • 3/4" x 3/4" FNPT  Dual Backflow Check Valve Lead-Free Bronze Zurn 34UFX34F-700XL

      3/4" x 3/4" FNPT Dual Backflow Check Valve Lead-Free Bronze Zurn 34UFX34F-700XL

      5 out of 5 stars
      (1)1 product ratings - 3/4" x 3/4" FNPT Dual Backflow Check Valve Lead-Free Bronze Zurn 34UFX34F-700XL
      C $39.58
      Was: C $49.48
      20 sold
    • Watts 4A810 1/2  9D-M3 Backflow Preventer, Dual Check Valve SKU# 0062670

      Watts 4A810 1/2 9D-M3 Backflow Preventer, Dual Check Valve SKU# 0062670

      C $43.14
    • Wilkins 3/4" 950XL Double Check Valve Assembly 34-950XL Backflow Preventer DCV

      Wilkins 3/4" 950XL Double Check Valve Assembly 34-950XL Backflow Preventer DCV

      C $149.99
    • Mid-West Backflow Test Kit Bleed Off

      Mid-West Backflow Test Kit Bleed Off

      5 out of 5 stars
      (1)1 product ratings - Mid-West Backflow Test Kit Bleed Off
      C $120.53
      C $22.14 shipping
      10 watching
    • ZURN WILKINS 34-350FT - DOUBLE CHECK BACKFLOW PREVENTER W/FAST TEST TESTCOCKS

      ZURN WILKINS 34-350FT - DOUBLE CHECK BACKFLOW PREVENTER W/FAST TEST TESTCOCKS

      C $126.86
      C $22.25 shipping
    • NEW Watts Backflow Preventer 1/2" 0061935 Dual Check Valve w/ Atmospheric Vent

      NEW Watts Backflow Preventer 1/2" 0061935 Dual Check Valve w/ Atmospheric Vent

      C $53.29
      or Best Offer
    • Watts 0061894 Backflow Preventer 9BD

      Watts 0061894 Backflow Preventer 9BD

      C $63.37
      C $15.55 shipping
      255 sold
    • Watts 1/2" 9D-M3 Backflow Preventer Atmospheric Vent Threaded ports

      Watts 1/2" 9D-M3 Backflow Preventer Atmospheric Vent Threaded ports

      C $36.78
      C $37.07 shipping
    • ZURN - WILKINS REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER 375XL 1/2"

      ZURN - WILKINS REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER 375XL 1/2"

      C $290.53
      C $25.22 shipping
      or Best Offer
    • NEW OEM WILKINS 720-A 3/4" BRASS BODY ASSEMBLY FOR PRESSURE VACUUM BREAKER PVB

      NEW OEM WILKINS 720-A 3/4" BRASS BODY ASSEMBLY FOR PRESSURE VACUUM BREAKER PVB

      C $36.79
      or Best Offer
    • NEW  FEBCO 825YA / 825 YA / 825Y Reduced Pressure Zone Backflow Preventer 1&1/2"

      NEW FEBCO 825YA / 825 YA / 825Y Reduced Pressure Zone Backflow Preventer 1&1/2"

      C $633.08
      C $56.80 shipping
    • WATTS LF7R DUAL CHECK VALVE 1/2" X 1/2"

      WATTS LF7R DUAL CHECK VALVE 1/2" X 1/2"

      C $50.74
      or Best Offer
    • NEW Wilkins Dual Check Backflow Preventer 3/4" Model 760 NOS #A143

      NEW Wilkins Dual Check Backflow Preventer 3/4" Model 760 NOS #A143

      C $56.83
      Was: C $71.03
      C $16.37 shipping
      or Best Offer
    • NEW WATTS 1 LF009M2-QT-S 1in REDUCED PRESSURE ZONE BACKFLOW PREVENTER LEAD FREE

      NEW WATTS 1 LF009M2-QT-S 1in REDUCED PRESSURE ZONE BACKFLOW PREVENTER LEAD FREE

      C $444.05
    • Zurn Wilkins 1-375Xl Reduced Pressure Zone Backflow Preventer

      Zurn Wilkins 1-375Xl Reduced Pressure Zone Backflow Preventer

      5 out of 5 stars
      (1)1 product ratings - Zurn Wilkins 1-375Xl Reduced Pressure Zone Backflow Preventer
      C $487.49
      Was: C $494.78
      C $34.19 shipping
    • APOLLO 1” Backflow Preventer Dual Check Valve MTR Swivel, 1” M NPT DUCLF4A FSM1

      APOLLO 1” Backflow Preventer Dual Check Valve MTR Swivel, 1” M NPT DUCLF4A FSM1

      C $38.06
      C $25.70 shipping
      Only 1 left!
    • Watts 3/4 009M3-QTS REduced Pressure Zone Backflow Preventer

      Watts 3/4 009M3-QTS REduced Pressure Zone Backflow Preventer

      C $380.61
    •  WILKINS Zurn 1'' 975XL   Backflow Preventer Valve

      WILKINS Zurn 1'' 975XL Backflow Preventer Valve

      C $247.40
      C $89.00 shipping
    • Watts Backflow Preventer 9BD - NEW

      Watts Backflow Preventer 9BD - NEW

      C $53.29
      C $30.96 shipping
      Only 1 left!
    •  WILKINS Zurn 3/4'' 975XL   Backflow Preventer Valve

      WILKINS Zurn 3/4'' 975XL Backflow Preventer Valve

      C $222.02
      C $89.00 shipping
    • Watts N9 3/8" Brass Backflow Preventer Female Thread Dual Check

      Watts N9 3/8" Brass Backflow Preventer Female Thread Dual Check

      C $38.02
      Was: C $50.71
      C $29.95 shipping
      or Best Offer
      Only 1 left!
    • Watts 909 QT RPZ, Reduced Pressure Backflow Zone Assembly, 3/4"

      Watts 909 QT RPZ, Reduced Pressure Backflow Zone Assembly, 3/4"

      5 out of 5 stars
      (1)1 product ratings - Watts 909 QT RPZ, Reduced Pressure Backflow Zone Assembly, 3/4"
      C $241.05
      C $49.70 shipping
      or Best Offer
    • Watts 1 1/4" 009M2-QT Reduced Pressure Zone Backflow Preventer - Used GOOD

      Watts 1 1/4" 009M2-QT Reduced Pressure Zone Backflow Preventer - Used GOOD

      C $315.91
      or Best Offer
    • MID-WEST MODEL 830 - BACKFLOW PREVENTER TEST KIT

      MID-WEST MODEL 830 - BACKFLOW PREVENTER TEST KIT

      C $539.20
      C $80.47 shipping
      or Best Offer
    • Watts 1/2" 435241 009 QT Manual Backflow System 175 PSI

      Watts 1/2" 435241 009 QT Manual Backflow System 175 PSI

      C $101.50
      C $43.14 shipping
      or Best Offer
    • Watts 56054 LF719 Double Check Backflow Preventer 0065309 1"

      Watts 56054 LF719 Double Check Backflow Preventer 0065309 1"

      C $299.68
      Was: C $399.58
      C $25.39 shipping
      or Best Offer
    • 2" Watts Reduced Pressure Zone Backflow Fire Preventer Ames Model # LF4000B. 

      2" Watts Reduced Pressure Zone Backflow Fire Preventer Ames Model # LF4000B. 

      C $293.07
      or Best Offer
    • 3/8” Apollo Carbonated Backflow Preventer

      3/8” Apollo Carbonated Backflow Preventer

      C $95.14
      C $23.33 shipping
    • WATTS RK 007M1 C 1 1/2 - 2" Cover Repair Kit 0887191 for Backflow Preventer Repa

      WATTS RK 007M1 C 1 1/2 - 2" Cover Repair Kit 0887191 for Backflow Preventer Repa

      C $73.52
      C $16.66 shipping
    • Watts N9 Back-flow Preventer B64.8 Max 150 Lbs Max 140f 2.5” Tall

      Watts N9 Back-flow Preventer B64.8 Max 150 Lbs Max 140f 2.5” Tall

      C $74.85
      or Best Offer
    • Febco, Buckner, J-M 902-066 (905-046) Poppet Repair Kit for 715 AVB ½” – ¾” NOS

      Febco, Buckner, J-M 902-066 (905-046) Poppet Repair Kit for 715 AVB ½” – ¾” NOS

      C $12.37
    • Watts N9 Back-flow Preventer B64.8 Max 150 Lbs Max 140f 2.5”

      Watts N9 Back-flow Preventer B64.8 Max 150 Lbs Max 140f 2.5”

      C $50.75
    • Qty 6 Apollo, 13-511-08, Safety Relief Valve, 3/4" NPT Male x Female

      Qty 6 Apollo, 13-511-08, Safety Relief Valve, 3/4" NPT Male x Female

      C $124.33
    • Beeco Hersey FDC Double Check Valve Assembly DCA Model B645 3/4" 150 PSI Max

      Beeco Hersey FDC Double Check Valve Assembly DCA Model B645 3/4" 150 PSI Max

      C $190.24
      C $61.41 shipping
      or Best Offer
    • 4ALF-104-A2F - Apollo 3/4" 4A Series Double Check Valve Assembly DCLF4A

      4ALF-104-A2F - Apollo 3/4" 4A Series Double Check Valve Assembly DCLF4A

      C $158.59
      C $38.06 shipping
    • Watts 3/4" LF919-QT Lead Free Reduced Pressure Backflow Preventor 0065372

      Watts 3/4" LF919-QT Lead Free Reduced Pressure Backflow Preventor 0065372

      C $317.18
      0 bids · Ending Monday at 11:46 EST1d 7h
    • (1) Wilkins 14-860XL Lead Free Law Compliant Test Cocks 1/4-In Standard

      (1) Wilkins 14-860XL Lead Free Law Compliant Test Cocks 1/4-In Standard

      C $36.50
      Was: C $42.95
      C $25.67 shipping
      or Best Offer
    • WATTS BACKFLOW PREVENTER BODY 1" SS009-QT RP, 99430, 175PSI, ASSE 1013

      WATTS BACKFLOW PREVENTER BODY 1" SS009-QT RP, 99430, 175PSI, ASSE 1013

      C $171.27
      Was: C $190.31
      C $180.55 shipping
      or Best Offer
    • NEW WATTS 0061888 BACKFLOW PREVENTER 3/4 9D-M2

      NEW WATTS 0061888 BACKFLOW PREVENTER 3/4 9D-M2

      4.5 out of 5 stars
      (2)2 product ratings - NEW WATTS 0061888 BACKFLOW PREVENTER 3/4 9D-M2
      C $58.30

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