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2" to 8" Deringer Backflow Preventers

Deringer Backflow Preventers are the smallest, lightest, most economical, and best performing valves in the industry. They're the only all stainless steel backflow preventers and they are available with butterfly valves or OS&Y Gate Valves. Backflow Direct carries DC, RP, DCDA-II and RPDA-II Deringer backflow preventers for sale. All of our valves ship for free and their small size and light weight makes for hassle free shipping and delivery. You can install many Deringer backflow preventer models with just a one-man crew, no bulky equipment, so installs are more efficient and much easier. Our goal is to provide user-friendly, high-quality equipment; our Deringer Backflow Preventers are an example of that.

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  1. Deringer Double Check Backflow Preventer Valve (DC)
    Deringer 20 (DC) Double Check Backflow Preventer
  2. Deringer 30
    Deringer 30 (DCDA-II) Double Check Detector Backflow Preventer
  3. DERINGER 40 (RP)
    Deringer 40 (RP) Reduced Pressure Backflow Preventer
  4. DERINGER 50 (RPDA)
    Deringer 50 (RPDA-II) Reduced Pressure Detector Backflow Preventer
  5. Deringer 20G
    Deringer 20G (DC) Double Check Backflow Preventer w/ OS&Y Gate Valves
  6. Deringer 30G
    Deringer 30G (DCDA-II) Double Check Detector Backflow Preventer w/ OS&Y Gate Valves
  7. DERINGER 40G (RP)
    Deringer 40G (RP) Reduced Pressure Backflow Preventer w/ OS&Y Gate Valves
  8. DERINGER 50G (RPDA)
    Deringer 50G (RPDA-II) Reduced Pressure Detector Backflow Preventer w/ OS&Y Gate Valves
  9. Deringer 20X
    Deringer 20X (DC) Xtreme Performance Double Check Backflow Preventer
  10. Deringer30X GPM
    Deringer 30X (DCDA-II) Xtreme Performance Double Check Detector Backflow Preventer
  11. Deringer 20GX
    Deringer 20GX (DC) Xtreme Performance Double Check Backflow Preventer w/OS&Y Gate Valves
  12. Deringer 30GX GPM
    Deringer 30GX (DCDA-II) Xtreme Performance Double Check Detector Backflow Preventer w/OS&Y Gate Valves