3 LF709-QT-FDA-IOT

Item Number: 88003409
1 1
$12,720.74
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Body Material: Fused Epoxy Coated Cast Iron
  • Coating: ArmorTek® corrosion-resistant epoxy system
  • Lead Free: Yes (less than 0.25% lead content)
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F – 110°F (0.5°C – 43°C)
  • Integrated pressure sensors for monitoring
  • Approved for vertical flow up installation

Description

The 3 inch Watts LF709 Lead Free Double Check Valve Backflow Preventer Assembly is engineered to protect potable water supplies from reverse flow of polluted water in non-health hazard installations. It features a durable fused epoxy coated cast iron body and FDA epoxy coated quarter-turn ball valves. The patented ArmorTek® coating system provides superior resistance against microbial-induced corrosion. Integrated pressure sensors allow for real-time performance monitoring when connected to an optional add-on kit for Building Management Systems. This assembly is lead free, ASSE 1015, AWWA C510-92, and CSA B64.5 approved, making it suitable for continuous pressure applications.

Help Me Connect

Connections & Compatibility

This Watts LF709 Double Check Valve Backflow Preventer is designed for installation in potable water systems to prevent the reverse flow of polluted water from non-health hazard cross-connections. The assembly features standard flanged connections for integration into your piping system. For advanced monitoring, its integrated pressure sensors require an add-on monitoring connection kit (sold separately) to transmit data to Building Management Systems (BMS) or Building Automation Systems (BAS) via a wired serial (RS-485) interface. Consult local jurisdictional authorities for specific installation requirements.

View full details

Additional Details

This 3 inch Watts LF709 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 system. It is ideal for continuous pressure piping applications and non-health hazard cross-connections.

Construction & Design

  • Features a fused epoxy coated cast iron body for durability.
  • Utilizes a modular check design concept to facilitate complete maintenance, allowing access to captured spring assemblies without special tools.
  • Equipped with FDA epoxy coated quarter-turn ball valves and replaceable stainless steel seats.
  • Approved for vertical flow up installation.

Corrosion Protection

  • Incorporates ArmorTek® coating technology, a patented three-part advanced epoxy system, to resist both microbial-induced corrosion (MIC) and exposed metal substrate corrosion.
  • Constructed with Lead Free* materials, ensuring the wetted surface contacted by consumable water contains less than 0.25% lead by weight.

Smart & Connected Monitoring

  • Comes standard with Smart and Connected technology, including integrated sensors at test cocks No. 2, No. 3, and No. 4 to measure pressure fluctuations.
  • An add-on monitoring connection kit (sold separately) is required to activate these sensors and transmit data over a wired serial (RS-485) interface to a Building Management or Building Automation System (BMS/BAS). This enables monitoring of assembly performance and the water supply system.

Specifications

General

  • Product Type: Double Check Valve Backflow Preventer
  • Series: LF709
  • Size: 3 inch
  • Connection Type: Flanged
  • Body Material: Fused Epoxy Coated Cast Iron
  • Coating: ArmorTek® Patented 3-Part Advanced Epoxy System
  • Valve Type: FDA Epoxy Coated Quarter-Turn Ball Valves
  • Seat Material: Stainless Steel (replaceable)
  • Lead Free: Yes (wetted surface less than 0.25% lead)

Performance

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F – 110°F (0.5°C – 43°C) continuous
  • Flow Characteristics: Maximum flow at low pressure drop

Monitoring & Technology

  • Sensors: Integrated pressure sensors at Test Cocks No. 2, 3, and 4
  • Monitoring Compatibility: Requires add-on connection kit for BMS/BAS integration (wired serial RS-485)
  • Installation Orientation: Approved for vertical flow up

Certificates & Approvals

  • ASSE: No. 1015
  • AWWA: C510-92
  • CSA: B64.5
  • UL Classified: File No. EX3185
  • Foundation for Cross-Connection Control and Hydraulic Research: Approved
  • IAPMO: ME PA-10
  • FM Approved: For Cross-Connection Control, 8th Edition
  • State Codes: Complies with reduced lead content requirements

FAQs

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

Its primary purpose is to prevent the reverse flow of polluted water from non-health hazard cross-connections back into the potable water supply system, protecting the drinking water from contamination.

Is this backflow preventer suitable for all types of water contamination?

No, the LF709 Double Check Valve Assembly is specifically designed for non-health hazard installations where the potential contaminant is polluted water, not high-hazard contaminants. Always check with local authorities.

What does "Lead Free" mean for this product?

"Lead Free" means that the wetted surface of the product, which comes into contact with consumable water, contains less than 0.25% lead by weight, complying with lead-free installation requirements.

How does the ArmorTek® coating benefit the backflow preventer?

The ArmorTek® coating is a patented three-part advanced epoxy system that provides integrated protection against electrochemical corrosion and microbial-induced corrosion (MIC) for the internal and external iron components of the assembly.

Can I monitor the performance of this backflow preventer remotely?

Yes, the LF709-IOT model comes standard with integrated pressure sensors at test cocks. To activate these sensors and transmit data to a Building Management System (BMS) or Building Automation System (BAS), an add-on monitoring connection kit (sold separately) is required.

Related Products

1 2