The Colt 4 inch C300-DOSY Double Check Detector Backflow Preventer Assembly is designed for non-health hazard applications, primarily protecting fire line sprinkler systems and industrial processes from dangerous cross-connections. Its compact design features a durable 304 stainless steel housing and sleeve, making it 70% lighter than traditional models. The patented Tri-Link Check offers lowest pressure loss and easy serviceability. This assembly includes domestic OSY shutoffs and a gallons per minute metered bypass for leak detection and monitoring. Approved for horizontal, vertical, or N pattern installations, it offers robust protection against backsiphonage and backpressure with a maximum working pressure of 175 psi. Item number 0206330.
Help Me Connect
Connections
The assembly features flanged inlet and outlet connections via domestic OSY resilient seated gate valves.
The gate valves connect to the backflow assembly using groove fittings, allowing for integral pipeline adjustment.
The OS&Y model includes an option for an integrated supervisory switch on each gate valve.
The Colt 4 inch double check detector backflow preventer assembly is designed to protect drinking water supplies from dangerous cross-connections in applications like fire line sprinkler systems or industrial processing. This assembly prevents reverse flow caused by backsiphonage and backpressure, suitable for non-health hazard applications.
Features
Extremely compact design, 70% lighter than traditional designs.
304 (Schedule 40) Stainless steel housing & sleeve provides long-term corrosion protection and maximum strength.
Patented Tri-Link Check provides the lowest pressure loss and unmatched ease of serviceability.
Includes a gallons per minute metered bypass to detect underground leaks and unauthorized water use.
May be used for horizontal, vertical or N pattern installations.
Available with domestic outside stem and yoke (OSY) resilient seated gate valves.
Groove fittings allow integral pipeline adjustment.
Replaceable check disc rubber.
Includes an integrated supervisory switch as an option on each gate valve of the OS&Y model.
A WARNING: It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Before installing standard material product, consult your local water authority, building and plumbing codes.
Pins & Fasteners Material: 300 Series stainless steel
Springs Material: Stainless steel
Maximum Working Pressure: 175 psi (12.1 bar)
Temperature Range: 33°F - 140°F (0.5°C - 60°C)
Certificates & Approvals
Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The Unversity of Southern California (FCCCHR-USC)
AWWA C510-97
ASSE 1048
CSA B64.5
UL Classified (**BFG & OSY Only)
FM Approved (**BFG & OSY Only)
FAQs
What is the primary use of this backflow preventer?
This backflow preventer is primarily designed to protect drinking water supplies from non-potable cross-connections in non-health hazard applications, such as fire line sprinkler systems or industrial processing, preventing reverse flow due to backsiphonage and backpressure.
What is the maximum operating pressure and temperature range?
The assembly has a maximum working pressure of 175 psi (12.1 bar) and operates within a temperature range of 33°F to 140°F (0.5°C to 60°C).
What type of shutoff valves are included?
This model includes domestic outside stem and yoke (OSY) resilient seated gate valves, which are UL Classified and FM Approved.
Can this backflow preventer be installed in different orientations?
Yes, the Series C300, C300N assemblies are approved for horizontal, vertical, or N pattern installations.
What are the benefits of the Tri-Link Check design?
The patented Tri-Link Check design provides the lowest pressure loss within the assembly and offers unmatched ease of serviceability, as it can be removed and serviced without special tools.
