Skip to Main Content


Part of the 774DCDA Series

Ordering Code: 0439333

UPC: 098268345001

12 In Ss Double Check Detector Assembly, Domestic Osy Shutoff, Cubic Feet Meter, Short Lay Length

This 12 inch double check detector assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. It is ideal for protection at cross-connections identified as non-health hazards such as on fire protection systems and from other contaminants found at the service line entrance. The compact modular design has a single access cover for easy maintenance. It is approved for horizontal and vertical flow up installation. It consists of a light weight stainless steel body, domestic outside stem and yoke resilient seated gate valves, four test cocks, torsion spring check valves, a cubic feet per minute metered bypass to detect underground leaks and unauthorized water use.

Product Features

  • No special tools required for servicing
  • Stainless steel body
  • Cubic feet per minute meter
  • Non-health hazard application
Backflow Preventer Type Double Check Detector Assembly
Body Finish Stainless Steel
Body Material Stainless Steel
Body Pattern Does Not Apply To Product
Brand Name Watts
Bypass Yes
Bypass Size 3/4 IN
Cap And Tether No
Disc Material Does Not Apply To Product
EANUCCCode 098268345001
Elbow Fitting No
Hazard Protection Level Non Health Hazard
Hot And Harsh Water No
Hydrant Connection No
Inlet Connection Size 12 IN
Inlet Connection Size-Metric 300 MM
Inlet Connection Type Flanged Joint
Inlet Shutoff Valve Type Outside Stem And Yoke Gate Valve
Inlet Thread Type Does Not Apply To Product
Maximum Temperature-Fahrenheit 110
Maximum Working Pressure-BAR 12.10
Maximum Working Pressure-PSI 175
Meter Type CFM
Minimum Temperature - Celsius 0.50
Minimum Temperature-Fahrenheit 33
Outlet Connection Size 12 IN
Outlet Connection Type Flanged Joint
Outlet Shutoff Valve Type Outside Stem And Yoke Gate Valve
Outlet Thread Type Does Not Apply To Product
Part Number 0439333
Polymer Coating No
Pressure Operation Continuous
Protection Type Backpressure and Backsiphonage
Seat Material Engineered Plastic
Series 774DCDA
Strainer No
Type Kit

Product Accessories