8 709DCDA-DOSY-GPM3/4

Item Number: 0389193
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$43,073.25
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • 8 inch Double Check Detector Assembly
  • Weight: 1439.0 lb
  • ArmorTek® coating resists corrosion (MIC and electrochemical)
  • Cast iron body with fused epoxy coating
  • Domestic OSY resilient seated gate valves
  • Gallons per minute metered 3/4 inch bypass
  • Maximum Working Pressure: 175 PSI
  • UL Classified and FM Approved
  • Modular check design for easy maintenance

Description

The Watts Series 709DCDA 8 inch Double Check Detector Backflow Preventer with Domestic OSY Shutoffs is designed to prevent the reverse flow of non-potable fire protection system substances into potable water lines. Its fused epoxy coated cast iron body features patented ArmorTek® coating for superior resistance against microbial-induced and electrochemical corrosion. This UL Classified and FM Approved assembly includes a 3/4 inch gallons per minute metered bypass to detect leaks and unauthorized water use. With a maximum working pressure of 175 PSI, it is ideal for non-health hazard cross-connections. Item number 0389193.

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Installation Guidance

  • This 8 inch Double Check Detector Assembly is specifically designed for installation on fire protection systems when connected to a potable water supply.
  • It is suitable for protecting cross-connections identified as non-health hazards.
  • The 8 inch size is approved for both horizontal and vertical "flow up" installations, providing flexibility for various piping configurations.
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Additional Details

This 8 inch Watts Series 709DCDA Double Check Detector Backflow Preventer assembly is designed to prevent the reverse flow of fire protection system substances and non-potable water into the potable water supply due to backsiphonage and/or backpressure.

It is ideal for protection at cross-connections identified as non-health hazards, such as on fire protection systems and from other contaminants found at the service line entrance.

Key Components

  • Fused epoxy coated cast iron body
  • Domestic Outside Stem and Yoke (OSY) resilient seated gate valves
  • Captured spring check valves
  • Gallons per minute metered 3/4 inch bypass for leak detection
  • Four test cocks

Advanced Corrosion Protection

The backflow preventer's iron components are coated with ArmorTek®, a patented three-part advanced epoxy coating system engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrate from electrochemical corrosion.

Features

  • Modular check design facilitates complete maintenance and assembly access
  • Replaceable bronze seats
  • Provides maximum flow at low pressure drop
  • Compact design for economy combined with performance
  • Design simplicity for easy maintenance
  • No special tools required for servicing

Specifications

  • Type: Double Check Detector Assembly
  • Size: 8 inch
  • Body Material: Cast Iron
  • Body Coating: ArmorTek powder coating (internal and external surfaces)
  • Seat Material: Bronze
  • Disc Holder Material: Bronze
  • Trim Material: Stainless Steel
  • Check Valve Discs: Rubber
  • Test Cocks Material: Bronze
  • Shutoff Valves: Domestic Outside Stem and Yoke (OSY) resilient seated gate valves
  • Bypass Meter: 3/4 inch (gallons per minute)
  • Test Cocks: Four, ball type
  • 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)
  • Flow Orientation: Horizontal and vertical "flow up" (for 8 inch size)

Certificates & Approvals

  • UL Classified
  • FM Approved
  • ASSE 1048
  • AWWA Standard C510
  • 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 purpose of this 8 inch backflow preventer?

This 8 inch Double Check Detector Assembly is designed to prevent the reverse flow of non-potable fire protection system substances, such as glycerin wetting agents or stagnant water, into the potable water supply.

How does ArmorTek® coating protect the backflow preventer?

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

Does this backflow preventer help detect water leaks?

Yes, this assembly includes a gallons per minute metered 3/4 inch bypass. This feature helps to detect underground leaks and unauthorized water use, which can lead to unaccountable water costs.

What certifications and approvals does this model have?

This Watts 709DCDA Series backflow preventer is UL Classified, FM Approved, meets ASSE 1048, AWWA Standard C510, and CSA B64.4. It is also approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California.

What type of shutoff valves are included with this assembly?

The backflow preventer comes equipped with domestic Outside Stem and Yoke (OSY) resilient seated gate valves, which are also UL Classified and FM Approved.

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