3 709DCDA-DOSY-GPM3/4

Item Number: 0389186
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$15,169.50
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Nominal Size: 3 inch
  • Weight: 327.0 lb
  • Body Material: Cast Iron
  • Corrosion Resistance: ArmorTek® Coating Technology
  • Bypass Meter: 3/4 inch Gallons per Minute
  • Shutoff Valves: Domestic OSY Resilient Seated Gate Valves
  • Maximum Working Pressure: 175 psi
  • Modular Check Design for Easy Maintenance
  • Approvals: UL Listed, FM Approved, ASSE 1048, AWWA C510

Description

The 3 inch Watts 709DCDA Double Check Detector Assembly Backflow Preventer (0389186) is engineered to prevent the reverse flow of fire protection system substances and non-potable water into a potable water supply. Ideal for cross-connections identified as non-health hazards, this assembly features a durable fused epoxy coated cast iron body with advanced ArmorTek® coating for superior corrosion resistance. It includes domestic outside stem and yoke (OSY) resilient seated gate valves, captured spring check valves, and a 3/4 inch gallons per minute bypass meter for leak detection. The modular design simplifies maintenance. Approved by UL, FM, ASSE, and AWWA for reliable performance up to 175 psi.

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Compatibility and Connection

  • This Watts 709DCDA Double Check Detector Assembly is specifically designed for installation on fire protection systems to prevent the backflow of fire protection substances and non-potable water into a potable water supply.
  • It is suitable for cross-connections identified as non-health hazards and connects at the service line entrance to safeguard against contaminants.
  • Always ensure installation complies with local water authority containment requirements.
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Additional Details

The 3 inch Watts 709DCDA-DOSY-GPM3/4 Double Check Detector Assembly Backflow Preventer is designed to prevent the reverse flow of fire protection system substances and non-potable water into the potable water supply, protecting against backflow and backsiphonage.

This assembly is ideal for cross-connections identified as non-health hazards, such as on fire protection systems.

Construction & Design

  • Features a fused epoxy coated cast iron body for durability.
  • Equipped with domestic outside stem and yoke (OSY) resilient seated gate valves.
  • Includes captured spring check valves and four test cocks.
  • Incorporates a gallons per minute (GPM) metered 3/4 inch bypass for detecting underground leaks and unauthorized water use.
  • Utilizes ArmorTek® coating technology, a patented 3-part advanced epoxy system, to resist microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • The modular check design facilitates complete maintenance and assembly, with non-interchangeable first and second check valve spring modules.

Specifications

  • Nominal Size: 3 inch
  • Body Material: Cast Iron
  • Coating: ArmorTek® Powder Coating (internal and external)
  • Seat Material: Bronze
  • Disc Holder Material: Bronze
  • Trim Material: Stainless Steel
  • Check Valve Discs: Rubber
  • Test Cock Material: Bronze
  • Bypass Meter: 3/4 inch Gallons per Minute (GPM)
  • Shutoff Valves: Domestic Outside Stem and Yoke (OSY) Resilient Seated Gate Valves

Performance

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Continuous Temperature Range: 33°F - 110°F (0.5°C – 43°C)
  • Intermittent Temperature Range: 140°F (60°C)

Certificates & Approvals

  • AWWA Standard C510
  • ASSE 1048
  • UL Listed
  • UL Classified
  • FM Approved
  • UPC
  • CSA B64.4
  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

FAQs

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

This backflow preventer is designed to prevent the reverse flow of fire protection system substances and non-potable water from entering the potable water supply. It protects against both backsiphonage and backpressure situations.

How does the ArmorTek® coating benefit this backflow preventer?

The ArmorTek® coating is a patented three-part advanced epoxy system applied to the cast iron body. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the durability and lifespan of the assembly.

What is the purpose of the 3/4 inch bypass meter?

The 3/4 inch gallons per minute (GPM) bypass meter is integrated into the assembly to detect underground leaks that lead to unaccountable water loss. It also helps to identify points of unauthorized water use.

What certifications and approvals does this backflow preventer have?

This assembly is UL Listed, UL Classified, FM Approved, and meets AWWA Standard C510, ASSE 1048, UPC, and CSA B64.4 standards. It is also approved by the Foundation for Cross-Connection Control and Hydraulic Research.

Is specialized equipment or tools needed for servicing the check assembly?

No, special tools are not required for servicing the check assembly. The modular design of the check assembly facilitates complete maintenance and assembly access, making servicing straightforward.

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