10 LF709-DOSY

Item Number: 0792171
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$54,621.92
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 10 inch
  • Weight: 2003.0 lb
  • Lead Free Construction: Less than 0.25% lead
  • Body Material: Epoxy Coated Cast Iron
  • Shutoff Valves: Domestic OSY
  • Corrosion Protection: ArmorTek® epoxy coating
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 110°F
  • Approvals: ASSE 1015, AWWA C510-92, CSA B64.5, UL Classified, FM Approved, NSF/ANSI 61

Description

This 10 inch Watts Lead Free Series LF709 Double Check Valve Backflow Preventer Assembly prevents polluted water from entering potable water systems. Designed for non-health hazard applications, it features an epoxy-coated cast iron body with ArmorTek® technology for superior corrosion resistance against microbial-induced corrosion. The assembly includes domestic OSY resilient seated gate valves and a modular design for easy maintenance without special tools. It offers maximum flow at low pressure drop and complies with Lead Free installation requirements. Ideal for continuous pressure piping, it is approved by ASSE, AWWA, CSA, UL, FM, and NSF/ANSI 61.

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Application & Installation

The Watts 10 inch Lead Free Series LF709 Double Check Valve Backflow Preventer Assembly is designed for installation at cross-connections to protect the potable water supply from backflow of polluted water. It is ideal for continuous pressure piping applications and for services where non-health hazards and non-toxic contaminants exist. This assembly is approved for vertical flow up installation.

Compliance & Requirements

  • Consult with your local authority having jurisdiction regarding specific installation requirements.
  • Thoroughly read all installation instructions and product safety information before beginning installation.
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Additional Details

The Watts 10 inch Lead Free Series LF709 Double Check Valve Backflow Preventer Assembly is designed to prevent the reverse flow of polluted water from entering into the potable water system due to backsiphonage or backpressure.

This assembly is suitable for non-health hazard continuous pressure piping applications and at cross-connections identified as non-health hazards, protecting against non-toxic contaminants at the service line entrance.

Construction & Design

  • Features a compact modular design for easy maintenance with a single access cover for in-line repairs.
  • Constructed with an epoxy coated cast iron body.
  • Incorporates domestic outside stem and yoke (OSY) resilient seated gate valves.
  • Includes two in-line independent positive seating check modules with captured springs and replaceable check discs and seats.
  • Center stem guiding for check modules.
  • Approved for vertical flow up installation.

Corrosion Protection

  • Utilizes ArmorTek® coating technology, a patented three-part advanced epoxy system, applied to internal and external surfaces.
  • Engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates.

Key Features

  • Lead Free* construction complies with reduced lead content requirements.
  • Provides maximum flow at low pressure drop.
  • Servicing can be performed without special tools.
  • Includes top mounted test cocks.

Note: The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Specifications

  • Size: 10 inch
  • Assembly Type: Double Check Valve Backflow Preventer
  • Shutoff Type: Domestic Outside Stem and Yoke (OSY) Gate Valves
  • Body Material: Epoxy Coated Cast Iron
  • Coating Technology: ArmorTek® (3-part advanced epoxy system)
  • Seat Material: Stainless Steel
  • Check Modules: Two in-line independent positive seating
  • Springs: Captured
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F - 110°F (0.5°C - 43°C)
  • Lead Content: Less than 0.25% by weight (wetted surface)

Certificates & Approvals

  • ASSE: No. 1015
  • AWWA: C510-92
  • CSA: B64.5
  • UL Classified: File No. EX3185
  • FM Approved: Yes (for Cross-Connection Control and Hydraulic Research at USC)
  • NSF/ANSI: 61
  • IAPMO: PS 31
  • FM: Manual for Cross-Connection Control, 8th Edition

FAQs

What is the primary purpose of the Watts LF709 Double Check Valve Assembly?

The primary purpose is to prevent the reverse flow of polluted water from entering into the potable water supply, protecting it from backsiphonage or backpressure.

What type of hazards is the LF709 suitable for protecting against?

This assembly is designed for non-health hazard installations and applications involving non-toxic contaminants at the service line entrance.

What material is the body of the backflow preventer made from and what corrosion protection does it have?

The body is constructed from epoxy coated cast iron and features ArmorTek® coating technology, a patented three-part advanced epoxy system, to resist microbial-induced and exposed metal substrate corrosion.

Are special tools required for servicing the Watts LF709 assembly?

No, the Watts LF709 Double Check Valve Assembly is designed for servicing without the need for special tools. Its modular design facilitates easy maintenance.

What is the maximum operating pressure and temperature range for this backflow preventer?

The maximum working pressure for this assembly is 175 psi (12.1 bar). It operates effectively within a temperature range of 33°F to 110°F (0.5°C to 43°C).

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