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  1. Showing 1 - 36 out of 180 results for "what is a check valve"
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      1/2 In, Inline Swing,Check Valve, Single, 316 Stainless Steel, Fnpt X Fnpt,20400003421
      1/2 In, Inline Swing,Check Valve, Si…
      A
      Amazon.com
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      Check Valve, Brass, 1/2In, 6 Gpm
      Check Valve, Brass, 1/2In, 6 Gpm
      A
      Amazon.com
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      Watts 3/4-In FNPT X FNPT Bronze Dual Check Valve | LF7RU2-2 3/4 X 3/4 R
      4.7
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      20
      4.7
      20 ratings
      Watts 3/4-In FNPT X FNPT Bronze …
      L
      Lowe's
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      Chillwaves Brass In-Line Spring Check Valve DN20 3/4" Male Thread, One-Way Non-Return Vertical Check Valveprevent Water Back-Flow(1-PACK)
      Chillwaves Brass In-Line Spring Ch…
      A
      Amazon
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      Chillwaves 304 Stainless Steel In-Line Split Check Valve 1/4" NPT Female Thread, One-Way Non-Return Check Valveprevent Water Back-Flow(1-PACK)
      Chillwaves 304 Stainless Steel In-Li…
      A
      Amazon.com
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      1/2 In,Check Valve, Fnpt X Fnpt Bronze Single Inline Swing-2040004497
      1/2 In,Check Valve, Fnpt X Fnpt Bro…
      A
      Amazon.com
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      4.6
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      4.6
      11 ratings
      Control Devices-M2525-1WA Brass …
      A
      Amazon.com
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      4.5
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      8
      4.5
      8 ratings
      Chillwaves Brass Swing Check Valv…
      A
      Amazon.com
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      Podavelle 5/8" Non Return One Wa…
      A
      Amazon.com
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      3.3
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      3.3
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      2 in. PVC FIP X FIP Sch. 40 Check …
      H
      Home Depot
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      3.6
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      1/2 in. Solvent X 1/2 in. Solvent Sch…
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      Home Depot
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      4.5
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      4.5
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      3/4 in. IPS Brass Swing Check Valve
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      Home Depot
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      14
      4.8
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      1 in. FIP X 1 in. FIP Lead Free Bras…
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      Home Depot
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      4.2
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      4.2
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      1 in. FIP X FIP PVC Threaded Chec…
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      Home Depot
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      5
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      5
      4 ratings
      Simmons 503Sb Check Valve 1" - S…
      W
      Walmart
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      4.3
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      8
      4.3
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      1-1/4 in. FIP X 1-1/4 FIP Lead Free …
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      Home Depot
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      3.6
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      3.6
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      Homewerks 1/2 in. D X 1/2 in. D FI…
      A
      Ace Hardware
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      1-1/2" Lead-Free Brass Check Valv…
      P
      PVC Fittings Online
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      4.7
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      43
      4.7
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      Water Source Brass Check Valve, …
      T
      Tractor Supply Co.
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      4.5
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      4.5
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      Watts Dual Check Valve: LF7R, 1/2 …
      G
      Grainger
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      3.6
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      23
      3.6
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      1-1/4 in. Solvent X 1-1/4 in. Solvent …
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      Home Depot
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      3.4
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      3.4
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      Homewerks 3/4 in. D X 3/4 in. D Sol…
      A
      Ace Hardware
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      3.3
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      3
      3.3
      3 ratings
      1" NPT Brass Swing Check Valve
      Cashback4%Cashbackcash back
      Z
      Zoro.com
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      3.6
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      3.6
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      Homewerks 1 in. D X 1 in. D Solven…
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      Ace Hardware
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      1/2in LEAD FREE HIGH FLOW RA…
      Z
      Zoro.com
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      4.2
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      5
      4.2
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      Homewerks 1 in. D X 1 in. D FIP Br…
      A
      Ace Hardware
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      3.3
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      27
      3.3
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      1 in. Slip X Slip Solvent-Weld PVC …
      H
      Home Depot
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      3.6
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      3.6
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      Homewerks 1-1/2 in. D X 1-1/2 in. …
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      Ace Hardware
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      4.5
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      4.5
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      Fibropool Swimming Pool Check Va…
      A
      Amazon.com
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      4.1
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      4.1
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      1/2 in. Brass Sweat X Sweat Solder …
      H
      Home Depot
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      3/4" NPT Bronze Spring Check Valve
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      Zoro.com
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      4
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      1-1/4 in. Plastic Check Valve
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      Home Depot
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      1/2" NPT Stainless Steel Swing Che…
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      Zoro.com
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      CONTROL DEVICES Check Valve: …
      G
      Grainger
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      4.5
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      19
      4.5
      19 ratings
      Watts 0555177 1" Threaded LF600 …
      S
      SupplyHouse.com
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      3.4
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      26
      3.4
      26 ratings
      3/4 in. Slip By Slip Solvent-Weld PV…
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      Home Depot
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