Skip to Main Content


Part of the 774DCDA Series

Ordering Code: 0439555

UPC: 098268264654

Lead Free: NO

10 In Ss Double Check Detector Assembly, Osy Shutoffs, Flanged Inlet X Grooved Outlet, Gallons/Minute Meter, Short Lay Length

This 10 IN double check detector assembly prevents the backflow of fire protection system substances from being pumped or siphoned into the potable water supply. It consists of a compact construction and short lay length, ideal for retrofit installations. It features a lightweight stainless steel body, thermoplastic and stainless steel check valves, and low head loss. It has a gallons per minute meter. The connections are flanged inlet x grooved outlet. It can be installed in a horizontal or vertical flow-up position. It is designed for installation on applications identified by local authorities as non-health hazard, such as on fire protection systems. The maximum working pressure is 175 PSI (12.06 BAR).

Product Features

  • Stainless steel for corrosion resistance
  • Outside screw and yoke shutoffs
  • Designed for minimum head loss
  • Flanged inlet x grooved outlet
Backflow Preventer Type Double Check Detector Assembly
Body Finish Stainless Steel
Body Material Stainless Steel
Body Pattern Does Not Apply To Product
BrandName Watts
Bypass Yes
Bypass Size 3/4 IN
Cap And Tether No
Disc Material Does Not Apply To Product
Elbow Fitting No
Hazard Protection Level Non Health Hazard
Hot And Harsh Water No
Hydrant Connection No
Inlet Connection Size 10 IN
Inlet Connection Type Flanged Joint
Inlet Shutoff Valve Type Outside Stem And Yoke Gate Valve
Inlet Thread Type Does Not Apply To Product
LeadFree NO
Maximum Temperature-Fahrenheit 110
Maximum Working Pressure-BAR 12.10
Maximum Working Pressure-PSI 175
Meter Type GPM
Minimum Temperature-Fahrenheit 33
ModelNumber 774DCDA-OSY-FXG-GPM 10
Outlet Connection Size 10 IN
Outlet Connection Type Grooved Joint
Outlet Shutoff Valve Type Outside Stem And Yoke Gate Valve
Outlet Thread Type Does Not Apply To Product
Part Number 0439555
Polymer Coating No
Pressure Operation Continuous
Protection Type Backpressure and Backsiphonage
Seat Material Engineered Plastic
Series 774DCDA
Strainer No

Product Accessories