4 LF709-QT-S-FDA-IOT

Item Number: 88003416
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$15,425.25
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Nominal Size: 4 inch
  • Lead Free* Construction (less than 0.25% lead)
  • ArmorTek® Coating: 3-part advanced epoxy system resists MIC and corrosion
  • Integrated Pressure Sensors: For monitoring performance (requires add-on kit)
  • Modular Check Design: Facilitates easy maintenance
  • FDA Epoxy Coated Strainer: Included for water quality
  • Maximum Operating Pressure: 175 psi
  • Approvals: ASSE 1015, AWWA C510-92, CSA B64.5, UL Classified

Description

The Watts 4 inch LF709-QT-S-FDA-IOT is a lead free double check valve backflow preventer assembly designed to protect potable water systems from polluted backflow in non-health hazard installations. It features a robust epoxy-coated cast iron body with ArmorTek® coating for superior corrosion resistance and an FDA epoxy coated strainer. Integrated pressure sensors allow for performance monitoring when used with an optional connection kit. Its modular design simplifies maintenance, and it is approved for both horizontal and vertical flow-up installations. This assembly operates at a maximum pressure of 175 psi and is certified to ASSE 1015, AWWA C510-92, and UL standards. Item number 88003416.

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Smart Monitoring System Integration

  • The Watts Series LF709-IOT model comes standard with integrated pressure sensors at test cocks No. 2, No. 3, and No. 4. These sensors measure pressure fluctuations to assess backflow assembly performance.
  • To activate these sensors and collect data, an add-on monitoring connection kit (sold separately) is required. This kit communicates over a wired serial (RS-485) interface.
  • The connection kit is compatible with most Building Management Systems (BMS) and Building Automation Systems (BAS), allowing for remote monitoring and data analysis.

Please note: The use of integrated pressure sensors and monitoring connection kits does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of the backflow preventer. Always consult with local jurisdictional authorities for installation requirements.

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Additional Details

This 4 inch Watts Series LF709 lead free double check valve backflow preventer assembly is engineered to prevent the reverse flow of polluted water into potable water systems. It is designed for continuous pressure piping applications and cross-connections identified as non-health hazards, where approved by the local authority having jurisdiction.

The assembly features an integrated design for enhanced performance and simplified maintenance, including a durable ArmorTek® coating, FDA epoxy coated components, and smart monitoring capabilities.

Key Features

  • Lead Free* construction complies with reduced lead content requirements.
  • Modular check design facilitates complete maintenance and assembly, retaining the spring load.
  • Replaceable stainless steel seats.
  • Maximum flow at low pressure drop.
  • Captured spring assemblies for safety during servicing.
  • Approved for both horizontal and vertical flow up installation.
  • No special tools required for servicing.

Corrosion Protection

  • Features ArmorTek® coating technology, a patented three-part advanced epoxy system.
  • Designed to limit both microbial induced corrosion (MIC) and protect exposed metal substrate corrosion.
  • Body components are epoxy coated cast iron with ArmorTek powder coating for internal and external surfaces.
  • Includes an FDA epoxy coated strainer for added protection.

Smart Monitoring & Data Access

  • Equipped with integrated pressure sensors at test cocks No. 2, No. 3, and No. 4.
  • Sensors measure pressure fluctuations at three locations, enabling monitoring and assessment of assembly performance.
  • Requires an add-on monitoring connection kit (sold separately) to activate sensors and transmit data to Building Management Systems (BMS/BAS).
  • Data access helps drive scheduling of maintenance and repair, and provides a solution for monitoring assembly performance between code testing.

Specifications

  • Nominal Size: 4 inch
  • Product Type: Double Check Valve Assembly
  • Valve Type: Quarter-Turn Ball Valves (QT)
  • Strainer Type: FDA Epoxy Coated Strainer (S-FDA)
  • Monitoring: Integrated Pressure-Sensing IoT Test Cocks
  • Body Material: Epoxy Coated Cast Iron
  • Seats Material: Stainless Steel
  • Coating: ArmorTek® Powder Coating
  • 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 (Lead Free*)
  • Weight (with QT valves): 275 lb (125 kg)

Certifications & Approvals

  • ASSE No.: 1015
  • AWWA Standard: C510-92
  • CSA Standard: B64.5
  • UL Classified File No.: EX3185
  • IAPMO Approval: PA 31
  • USC Manual for Cross-Connection Control: 8th Edition
  • Approved by: Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

Dimensions (Approximate)

  • Overall Length (A): 52 3/8 in (1332 mm)
  • Main Body Length (L): 34 1/8 in (867 mm)
  • Height (U): 14 in (356 mm)
  • Inlet/Outlet Connection (D): 4 1/2 in (114 mm)
  • QT Valve Dimension (R*): 19 3/4 in (502 mm)

FAQs

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

The primary function is to prevent the reverse flow of polluted water from entering into the potable water supply system. It is designed for use in continuous pressure piping applications and cross-connections identified as non-health hazards.

Is the Watts LF709 backflow preventer lead free?

Yes, this Watts LF709 assembly features Lead Free* construction, meaning the wetted surface contacted by consumable water contains less than 0.25% of lead by weight, complying with Lead Free* installation requirements.

How does the ArmorTek® coating protect the valve assembly?

The ArmorTek® coating 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 substrates, enhancing the longevity of the backflow preventer.

What is the purpose of the integrated pressure sensors?

The integrated pressure sensors at test cocks No. 2, No. 3, and No. 4 measure pressure fluctuations. When activated with an add-on monitoring connection kit (sold separately), this technology enables monitoring and assessment of backflow assembly performance and the water supply system.

Are special tools required for maintenance of the LF709 assembly?

No, the Watts LF709 features a simplified modular design concept to facilitate complete maintenance and assembly, and no special tools are required for servicing the check modules.

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