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Check Valves and Backflow Preventers

226 Results Found that Include 1,513 Products 

Results per page: 16 | 32 | 48
  • WATTS
  • Vacuum Breaker
  • Multiple product options available

  • WILKINS
  • Vacuum Breaker
  • Multiple product options available

  • APOLLO
  • Vacuum Breaker
  • Multiple product options available

  • GRAINGER APPROVED VENDOR
  • Swing Check Valve
  • Multiple product options available

  • JOHN GUEST
  • Check Valve
  • Multiple product options available

  • GRAINGER APPROVED VENDOR
  • Vacuum Breaker
  • Multiple product options available

Vacuum Breaker,3/4 In,MNPT,Brass,150 psi
  • BELL & GOSSETT
  • Vacuum Breaker, 3/4 In, MNPT, Brass, 150 psi
  • Item # 4NU79
  • Mfr. Model # 62
  • Vacuum Breaker, Size 3/4 In., Connection Type MNPT, Material of Construction Brass, Max. Pressure 150 psi,...More

Screw-In Check Valve,TPR,MNPT
  • DAYTON
  • Screw-In Check Valve, TPR, MNPT
  • Item # 4UN78
  • Mfr. Model # 4UN78
  • Screw-In Check Valve, Material of Construction TPR, Size 1-1/4 In. or 1-1/2 In., Connection Type MNPT,...More

  • HAYWARD
  • Check Valve
  • Multiple product options available

  • MILWAUKEE VALVE
  • Swing Check Valve
  • Multiple product options available

Check Valve,TPR,1-1/4 In. or 1-1/2 In.
  • DAYTON
  • Check Valve, TPR, 1-1/4 In. or 1-1/2 In.
  • Item # 4UN79
  • Mfr. Model # 4UN79
  • Check Valve, Material of Construction TPR, Size 1-1/4 In. or 1-1/2 In., Connection Type Slip Union, Mounting...More

  • MILWAUKEE VALVE
  • Spring Check Valve
  • Multiple product options available

  • CAMPBELL
  • Spring Check Valve
  • Multiple product options available

  • PARKER
  • Check Valve
  • Multiple product options available

Results per page: 16 | 32 | 48

Protect potable water supplies from contamination or pollution with check valves and backflow preventers from Grainger. When pressure fails or is reduced for water, it can bring contaminated water from the ground, from storage or from other sources drawn from the system. Hydronic, flow check valves provide positive shutoff when the circulator is not running.