3 LF007-DOSY

Item Number: 0792149
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$9,514.27
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • 3 inch Double Check Valve Backflow Preventer
  • Weight: 225.0 lb
  • Lead Free* cast iron body construction
  • ArmorTek® coating technology for corrosion resistance
  • Domestic OSY resilient seated gate valves
  • Single top-entry cover for easy in-line maintenance
  • Maximum Working Pressure: 175 PSI
  • ASSE 1015 and AWWA C510 compliant
  • Replaceable check discs and seats

Description

This 3 inch Watts Series LF007-DOSY Double Check Valve Assembly is designed to prevent the backflow of polluted water into the potable water supply in non-health hazard applications. Featuring a Lead Free* cast iron body with patented ArmorTek® epoxy coating, it offers superior resistance to microbial-induced corrosion. The modular design, domestic OSY resilient seated gate valves, and single top-entry cover ensure easy maintenance without special tools. It is approved by ASSE 1015, AWWA C510, and IAPMO PS31, with a maximum working pressure of 175 PSI. Item number 0792149.

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Connection and Application Guidance

This 3 inch LF007-DOSY Double Check Valve Assembly is designed for installation at cross-connections where polluted water could otherwise enter the potable water supply. It is suitable for applications identified by local inspection authorities as non-health hazards. The assembly is intended for use in continuous pressure piping systems and for protecting against non-toxic contaminants at the service line entrance.

It features domestic OSY resilient seated gate valves for secure shutoff and top-mounted test cocks for simplified testing.

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Additional Details

This 3 inch Lead Free double check valve backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage or backpressure.

It is ideal for protection in continuous pressure piping applications and at cross-connections identified by local inspection authorities as non-health hazards.

Construction & Design

  • Features a fused epoxy coated cast iron body for durability.
  • Utilizes ArmorTek® coating technology, a patented three-part advanced epoxy system, to resist microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • Includes two in-line independent positive seating check modules with captured springs and replaceable check discs and seats.
  • Equipped with domestic OSY (Outside Stem and Yoke) resilient seated gate valves and top-mounted test cocks.

Ease of Maintenance

  • Modular, compact design facilitates easier maintenance and assembly by retaining the spring load.
  • Service of internal components is simplified through a single access cover for in-line repairs.
  • No special tools are required for servicing.

Please inquire with governing authorities for local installation requirements.

Specifications

General

  • Product Type: Double Check Valve Backflow Preventer
  • Series: LF007
  • Size: 3 inch
  • Connection Type: Flanged
  • Application: Non-health hazard cross-connections, continuous pressure piping, non-toxic contaminants

Materials

  • Body Material: Lead Free* Cast Iron
  • Coating: ArmorTek® Powder Coating (internal and external surfaces)
  • Check Module: Captured spring, rubber seat disc
  • Access Cover Bolts: Stainless Steel

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)
  • Lead Content: Less than 0.25% by weight of wetted surface

Certificates & Approvals

  • ASSE Standard: 1015
  • AWWA Standard: C510
  • IAPMO: PS31
  • CSA Standard: B64.5
  • UL Classified: With OSY gate valves (horizontal only)
  • NSF Standard: NSF/ANSI 372
  • Approved By: Foundation for Cross-Connection Control and Hydraulic Research at USC

FAQs

What is the primary purpose of this backflow preventer?

This backflow preventer is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage or backpressure. It is intended for non-health hazard applications.

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

"Lead Free*" indicates that the wetted surface of this product, which contacts consumable water, contains less than 0.25% of lead by weight, complying with Lead Free* installation requirements.

What type of shutoff valves are included with this assembly?

This assembly includes domestic OSY (Outside Stem and Yoke) resilient seated gate valves, which are UL Classified when installed horizontally.

How does the ArmorTek® coating technology benefit this product?

ArmorTek® is a patented three-part advanced epoxy system that coats the iron components to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the product's longevity.

Is this backflow preventer difficult to maintain?

No, it features a modular, compact design with a single top-entry cover that allows for easier in-line maintenance and assembly. No special tools are required for servicing.

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