2" (Deringer 20) Kit

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The 2" (Deringer 20) Kit is a double check valve that prevents non-health hazard pollutants from entering a potable water supply system when backpressure and/or backsiphonage conditions occur.

2" (Deringer 20) Kit Includes:

  • (1) 2½" Deringer 20
  • (2) 2½" Groove Couplings
  • (2) 2" NPT x 2½" Groove Adapter
End connections are union type stainless steel 2” female NPT threads for ease of installation. Entire valve housing is constructed of stainless steel (including shut off valves) for industry leading corrosion resistance.



MSRP: $1,199.00
Pro Price: $999.00


Product Code: 2020

Specifications Technology Downloads
Untitled Document
Deringer 20 Title
2 Deringer 30 Cutaway
The Deringer 20 Double Check Valve Assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions.

  Maximum Working Pressure: 175psi (12.1 bar)  
  Temperature Range: 33° - 140°F (1° - 60°C)  
  End Connections    
  - IPS Groove for Steel Pipe: AWWA C606  
  - Flange Adapters: ANSI B16.1 Class 125  
  Lead Free: 0.25% Maximum by Weight  
Flow Chart Title
Deringer 20 Flow Chart
Measures & Materials Title
2 Deringer 30 Valve Dimentions
Valve Housing: 304 Stainless Steel   SOV Bearings: Teflon/Bronze   Check Springs: 17-7 Stainless Steel
Valve Cover: 304 Stainless Steel   Non Wetted Bolts: Grade 8 Zinc Plated   Check Pins: 17-7/18-8 Stainless Steel
SOV Disks: EPDM/304SS:   Wetted Fasteners: 18-8 Stainless Steel   Check Seats: Noryl Polymer
SOV Shafts: 304 Stainless Steel   Check Disks: Silicone   O-Rings: Buna-N
Engineering Specifications Title
The Deringer 20 Double Check (DC) valve shall utilize two independent Dual Action Check modules and two integral resiliently seated shut-off valves all of which shall be contained within a single rigid valve housing constructed entirely of 304 stainless steel. Both integral shutoff valves shall include pre-wired supervisory tamper switches contained within a weatherproof actuator housing approved for both indoor and outdoor use. Dual Action Check modules shall operate as a “poppet style” check under low flow conditions, operate as a “swing style” check under high flow conditions and utilize replaceable silicone elastomer sealing discs. Assembly test cocks shall be handle-less and operate via a tamper resistant actuator. Assembly shall have a single full access service port and cover with an “inline” replaceable elastomer seal. Assembly shall be serviceable without special tools and approved for both horizontal and vertical applications.

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