4 709DCDA-OSY-GPM

Item Number: 0385680
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$15,037.46
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 4 Inch
  • Weight: 500.0 lb
  • Body Material: Fused epoxy coated cast iron
  • Coating: ArmorTek corrosion protection
  • Shutoff Valves: OSY (Outside Stem and Yoke)
  • Meter: Gallons per minute for leak detection
  • Max Working Pressure: 175 PSI
  • Approvals: UL Listed, FM Approved, ASSE 1048, AWWA C510
  • Check Assembly: Modular design for easy maintenance

Description

This 4-inch Watts 709DCDA Double Check Detector Backflow Preventer is designed for use in fire protection systems to safeguard potable water supplies from non-health hazard substances. Its fused epoxy-coated cast iron body features ArmorTek technology, a patented three-part system engineered to resist microbial-induced corrosion and protect exposed metal. An integrated gallons per minute meter helps detect underground leaks and unauthorized water usage, reducing costs. The assembly includes OSY shutoff valves and modular check assemblies for easy maintenance. It is UL Listed, FM Approved, ASSE 1048, and AWWA C510 compliant, with a maximum working pressure of 175 psi.

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Application & Installation

  • This double check detector assembly is intended for installation on fire protection systems when connected to a potable water supply.
  • The 4 inch size is approved for both horizontal and vertical "flow up" installations.
  • It is essential to thoroughly read all installation instructions and product safety information before beginning installation. Inquire with governing authorities for local installation requirements.
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Additional Details

This 4 inch double check detector backflow preventer assembly is designed to prevent the reverse flow of non-health hazard fire protection system substances into the potable water supply. It also incorporates a gallons per minute meter to detect ground leaks and unauthorized illegal taps, helping to reduce annual water expenses.

Key Features

  • ArmorTek coating technology resists corrosion of internals and external surfaces.
  • Modular check design concept facilitates complete maintenance and assembly access.
  • Furnished with a 5/8" x 3/4" bronze meter to detect leaks and unauthorized use.
  • Compact design for economy combined with performance.
  • Requires no special tools for servicing.

Construction

  • Body constructed from fused epoxy coated cast iron.
  • Iron components coated with ArmorTek®, a patented three-part advanced epoxy system engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • Features replaceable bronze seats.
  • Equipped with resilient seated OSY shutoff valves and ball type test cocks.

Performance

  • Provides maximum flow at low pressure drop.
  • Approved for horizontal and vertical "flow up" installations for 4 inch sizes.

Specifications

  • Body Material: Cast Iron
  • Coating: ArmorTek Powder Coating
  • Check Valve Seat: Bronze
  • Check Valve Disc Holder: Bronze
  • Check Valve Trim: Stainless Steel
  • Check Valve Discs: Rubber
  • Test Cocks: Bronze
  • Shutoff Valves: OSY (Outside Stem and Yoke)
  • Meter: 5/8" x 3/4" Bronze Gallons per Minute Meter
  • 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

  • UL Listed
  • 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
  • CSA B64.4

FAQs

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

Its primary purpose is to prevent the reverse flow of non-health hazard substances, such as those found in fire protection systems, from contaminating the potable water supply.

What materials are used in the construction of this backflow preventer?

The body is constructed from fused epoxy-coated cast iron, featuring ArmorTek powder coating. Internal components include bronze seats and disc holders, stainless steel trim, rubber check valve discs, and bronze test cocks.

What is ArmorTek coating technology and what are its benefits?

ArmorTek is a patented three-part advanced epoxy coating system applied to the backflow preventer's iron components. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing durability and lifespan.

What are the maximum operating pressure and temperature ranges for this device?

The maximum working pressure is 175 psi (12.1 bar). It can operate continuously between 33°F and 110°F (0.5°C – 43°C) and intermittently up to 140°F (60°C).

Does this 4-inch model include a water meter?

Yes, this assembly is furnished with a 5/8" x 3/4" bronze meter, which allows for detection of leaks and unauthorized water usage in the system.

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