6 LF709-DOSY

Item Number: 0792169
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$18,565.49
Special Order
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
  • Lead Free: Less than 0.25% lead by weight
  • Body Material: Fused Epoxy Coated Cast Iron
  • Coating: ArmorTek® advanced epoxy coating technology
  • Valve Type: Domestic Outside Stem and Yoke (OSY) Shutoff
  • Design: Modular for easy maintenance with single access cover
  • Corrosion Resistance: Microbial induced and exposed metal substrate
  • Maximum Operating Pressure: 175 psi

Description

The 6 inch Lead Free Cast Iron Double Check Valve Backflow Preventer Assembly with Domestic OSY Shutoff prevents polluted water from entering potable systems due to backsiphonage or backpressure. Its robust fused epoxy coated cast iron body features ArmorTek® advanced epoxy coating technology for superior resistance to microbial induced and exposed metal substrate corrosion. The modular design simplifies maintenance, allowing for in-line repairs with a single access cover. Rated for 175 psi, this assembly ensures maximum flow at low pressure drop, making it ideal for continuous pressure piping applications and non-health hazard cross-connections. Item number 0792169.

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Application & Installation

  • This assembly is designed for use in continuous pressure piping applications.
  • It is suitable for cross-connections identified as non-health hazards, preventing polluted water from entering the potable water supply.
  • The Domestic Outside Stem and Yoke (OSY) resilient seated gate valves are integral to its operation.

Always check with the local jurisdictional authority regarding specific installation requirements and approvals for backflow prevention devices in your area.

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Additional Details

This 6 inch Lead Free double check valve backflow preventer assembly is designed to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and/or backpressure.

Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as non-health hazards.

Construction & Features

  • Features a fused epoxy coated cast iron body for durability.
  • Incorporates ArmorTek® coating technology, a patented 3-part advanced epoxy system engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • Equipped with domestic outside stem and yoke (OSY) resilient seated gate valves.
  • Includes two in-line independent positive seating check modules with captured springs for safety.
  • Designed for maximum flow at low pressure drop.
  • Features replaceable check discs and seats for simplified servicing.
  • No special tools are required for servicing.

Specifications

  • Size: 6 inch
  • Body Material: Fused Epoxy Coated Cast Iron
  • Coating: ArmorTek® Patented 3-Part Advanced Epoxy System
  • Valve Type: Domestic Outside Stem and Yoke (OSY) Resilient Seated Gate Valves
  • Seats: Replaceable Stainless Steel
  • Check Discs: Replaceable Resilient Disc
  • Springs: Captured Spring Assemblies
  • Test Cocks: Top Mounted
  • Lead Content: Less than 0.25% by weight (Lead Free)
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F - 110°F (0.5°C - 43°C) continuous, 140°F (60°C) intermittent

Certificates & Approvals

  • ASSE No. 1015
  • AWWA C510-92
  • CSA B64.5
  • UL Classified File No. EX3185
  • IAPMO PA 31
  • USC Manual for Cross-Connection Control, 8th Edition
  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
  • NSF Certified to NSF/ANSI 61-G
  • FM Approved (4" to 10" vertical "flow up" with OSY gate valves only)

FAQs

What is the primary function of this 6 inch backflow preventer?

This 6 inch Lead Free double check valve backflow preventer assembly is designed to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage or backpressure.

What does "Lead Free" construction mean for this product?

The "Lead Free" construction of this product means that the wetted surface contacted by consumable water contains less than 0.25% of lead by weight, complying with Lead Free installation requirements.

How does ArmorTek® coating technology benefit this backflow preventer?

ArmorTek® coating technology is a patented three-part advanced epoxy system applied to the iron components. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrate, extending the life of the backflow preventer.

Is this backflow preventer easy to maintain?

Yes, this backflow preventer features a modular check design concept and a single access cover to facilitate complete maintenance and assembly. It is also designed so that no special tools are required for servicing.

What are the maximum operating pressure and temperature ratings?

This assembly has a maximum working pressure of 175 psi (12.1 bar). The continuous temperature range is 33°F - 110°F (0.5°C - 43°C), with an intermittent temperature rating of 140°F (60°C).

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