4 709DCDA-DOSY-GPM

Item Number: 0389299
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$16,093.65
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 4 inch
  • Weight: 522.0 lb
  • Body Material: Fused epoxy coated cast iron
  • Coating: ArmorTek® advanced epoxy system
  • Maximum Working Pressure: 175 psi
  • Shutoff Valves: Domestic OSY resilient seated gate valves
  • Bypass Meter: Gallons per minute (GPM)
  • Approvals: UL Classified, FM Approved, ASSE 1048, AWWA C510
  • Corrosion Resistance: Protects against MIC and electrochemical corrosion

Description

This 4 inch Watts 709DCDA Double Check Detector Assembly Backflow Preventer is engineered for fire protection systems to prevent non-potable water and fire protection substances from entering the potable water supply. Featuring a durable fused epoxy coated cast iron body with ArmorTek® advanced coating, it offers superior resistance to microbial-induced and electrochemical corrosion. It includes domestic OSY resilient seated gate valves for isolation and a 5/8" x 3/4" bronze gallons per minute (GPM) metered bypass to detect leaks and unauthorized water usage. With a maximum working pressure of 175 psi, this assembly is UL Classified, FM Approved, ASSE 1048, and AWWA C510 compliant, ensuring reliable performance for non-health hazard cross-connections.

Help Me Connect

This Watts 709DCDA Double Check Detector Assembly is designed for installation on fire protection systems connected to a potable water supply to prevent backflow of non-potable water. It is suitable for cross-connections identified as non-health hazards. The 4 inch size is approved for both horizontal and vertical "flow up" installation. This assembly includes resilient seated OSY shutoff valves for isolation and a metered bypass for leak detection.

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Additional Details

This 4 inch Double Check Detector Assembly Backflow Preventer, Series 709DCDA, is designed to prevent the reverse flow of fire protection system substances and non-potable water into the potable water supply. It is ideal for protection against non-health hazards at cross-connections, such as those found on fire protection systems or at the service line entrance.

The assembly features a fused epoxy coated cast iron body and includes domestic outside stem and yoke (OSY) resilient seated gate valves, captured spring check valves, and a gallons per minute (GPM) metered bypass to detect leaks and unauthorized water use. Four test cocks are also included for verification.

Features

  • Body construction: Fused epoxy coated cast iron
  • ArmorTek® coating technology to resist corrosion of internals, microbial-induced corrosion (MIC), and exposed metal substrate corrosion
  • Replaceable bronze seats
  • Maximum flow at low pressure drop
  • Compact design for economy and performance
  • Design simplicity for easy maintenance
  • Furnished with 5/8" x 3/4" bronze meter on bypass line
  • No special tools required for servicing

Specifications

  • Product Size: 4 inch
  • Body Material: Cast iron
  • Coating: ArmorTek powder coating (internal and external surfaces)
  • Seat Material: Bronze
  • Disc Holder Material: Bronze
  • Trim Material: Stainless steel
  • Check Valve Disc Material: Rubber
  • Test Cocks Material: Bronze
  • Temperature Range (Continuous): 33°F - 110°F (0.5°C – 43°C)
  • Temperature Range (Intermittent): 140°F (60°C)
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Shutoff Valves: Outside Stem and Yoke (OSY) Resilient Seated Gate Valves
  • Bypass Meter: 5/8" x 3/4" Bronze, Gallons per minute (GPM)

Certificates & Approvals

  • UL Classified
  • FM Approved
  • ASSE 1048
  • AWWA Standard C510
  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

FAQs

What is the primary use of the Watts 709DCDA Double Check Detector Assembly?

This assembly is primarily used to prevent the reverse flow of fire protection system substances and non-potable water into a potable water supply, typically in non-health hazard cross-connections like fire sprinkler systems.

What is ArmorTek® coating technology and what does it protect against?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the cast iron components. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates from electrochemical corrosion.

What type of shutoff valves are included with this backflow preventer?

The assembly is equipped with domestic Outside Stem and Yoke (OSY) resilient seated gate valves, which are UL Classified and FM Approved.

Does this assembly include a meter, and what is its purpose?

Yes, it includes a 5/8" x 3/4" bronze gallons per minute (GPM) metered bypass. This meter helps detect underground leaks that would otherwise be unaccounted for and identifies unauthorized water usage.

What are the key approvals and standards met by the 4 inch Watts 709DCDA?

The 4 inch Watts 709DCDA is UL Classified, FM Approved, and meets ASSE 1048 and AWWA Standard C510. It is also approved by the Foundation for Cross-Connection Control and Hydraulic Research.

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