6 709DCDA-DOSY-GPM

Item Number: 0389300
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$23,602.68
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 6 inch
  • Weight: 893.0 lb
  • Body Material: Fused Epoxy Coated Cast Iron
  • Coating: ArmorTek® Advanced Epoxy System
  • Shutoff Valves: Domestic OSY Resilient Seated Gate Valves
  • Meter: Gallons per minute (GPM) Bypass
  • Maximum Working Pressure: 175 PSI
  • Approvals: UL Listed, FM Approved, ASSE 1048, AWWA C510
  • Designed for Fire Protection Systems

Description

The Watts 6 inch 709DCDA Double Check Detector Assembly is a robust backflow preventer engineered for fire protection systems to safeguard potable water supplies from contamination. It prevents reverse flow of non-potable substances due to backpressure or backsiphonage, meeting AWWA C510 and ASSE 1048 standards. Featuring a fused epoxy coated cast iron body with ArmorTek® anti-corrosion technology, domestic OSY shutoff valves, and a GPM metered bypass for leak detection, this unit offers reliable performance. It is UL Listed and FM Approved, ensuring high quality and compliance for critical cross-connection control applications.

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Application & Connection

This 6 inch Watts 709DCDA Double Check Detector Assembly is specifically designed for installation on fire protection systems where connection to a potable water supply exists. It prevents the backflow of non-potable substances like glycerin wetting agents, stagnant water, or other non-potable water from entering the clean water supply due to backsiphonage or backpressure.

The unit should be installed in accordance with local authority having jurisdiction requirements. It is approved for both horizontal and vertical "flow up" installations for this size.

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Additional Details

The Watts 6 inch 709DCDA Double Check Detector Assembly backflow preventer is designed for fire protection systems to prevent the reverse flow of non-potable fire protection substances and stagnant water into the potable water supply line.

This assembly provides essential containment against backsiphonage and backpressure in non-health hazard cross-connections, while also featuring a metered bypass to detect leaks and unauthorized water usage.

Construction & Features

  • 6 inch Double Check Detector Assembly for robust performance.
  • Body constructed from fused epoxy coated cast iron for durability.
  • Utilizes ArmorTek® coating technology, a patented three-part advanced epoxy system, applied to internal and external surfaces to resist microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • Equipped with domestic Outside Stem and Yoke (OSY) resilient seated gate valves for reliable shutoff.
  • Features replaceable bronze seats and silicon rubber check discs.
  • Includes a gallons per minute meter (GPM) bypass to detect underground leaks and unauthorized water use.
  • Modular check design concept facilitates easy maintenance and assembly.
  • Engineered for maximum flow at low pressure drop.
  • Compact design for economy combined with performance.
  • Includes four ball type test cocks.
  • No special tools required for servicing.

Specifications

  • Product Type: Double Check Detector Assembly
  • Series: 709DCDA
  • Size: 6 inch
  • Meter Type: Gallons per minute (GPM)
  • Shutoff Valves: Domestic OSY
  • Application: Fire Protection Systems, Potable Water Containment

Materials

  • Body Material: Fused Epoxy Coated 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 Cocks Material: Bronze

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 (with OSY shutoff valves)
  • UL Classified (with OSY shutoff valves)
  • FM Approved (with OSY shutoff valves)
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
  • Approved for horizontal and vertical "flow up" (for 6 inch size)

Dimensions (approximate)

  • Overall Length (A): 62 1/2 inches (1588 mm)
  • Width (L): 41 1/2 inches (1054 mm)
  • Height (C): 30 1/8 inches (765 mm)
  • Approximate Weight (W/OSY gates): 727 lbs (330 kg)

FAQs

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

Its primary purpose is to prevent the reverse flow of non-potable substances, such as those from fire protection systems, into the potable water supply. It protects against both backsiphonage and backpressure contamination.

What is ArmorTek® coating technology?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the internal and external surfaces of the backflow preventer. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the unit's longevity.

Does this backflow preventer include shutoff valves?

Yes, the Watts 709DCDA comes standard with domestic Outside Stem and Yoke (OSY) resilient seated gate valves, which are UL Classified and FM Approved.

How does the detector assembly feature help with water management?

The assembly includes a gallons per minute (GPM) metered bypass. This allows the water utility to detect underground leaks, which can lead to significant water waste, and also helps identify unauthorized water usage.

What certifications and approvals does this 6-inch model hold?

This 6-inch 709DCDA model is UL Listed and Classified, FM Approved, and meets AWWA Standard C510 and ASSE 1048 requirements. It is also approved by the Foundation for Cross-Connection Control and Hydraulic Research.

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