3 LF709-DNRS-IOT

Item Number: 88003394
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$9,943.62
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: Epoxy coated cast iron
  • Coating: ArmorTek powder coating
  • Maximum Working Pressure: 175 psi
  • Lead Free Construction: < 0.25% lead by weight
  • Features: Integrated pressure-sensing test cocks (IOT)
  • Valve Type: Domestic Non-Rising Stem (NRS) gate valves
  • Approvals: ASSE 1015, AWWA C510-92, CSA B64.5, UL Classified, NSF 61-G

Description

The Watts 3 inch Lead Free Double Check Valve Backflow Preventer Assembly (LF709-NRS-IOT) is engineered to prevent the backflow of polluted water into potable water systems, suitable for non-health hazard installations. It features a robust epoxy coated cast iron body with patented ArmorTek coating for superior corrosion resistance against MIC and exposed metal. Integrated pressure-sensing test cocks (IOT) allow for advanced monitoring of assembly performance, requiring an optional add-on connection kit for BMS/BAS integration. With a maximum working pressure of 175 psi and a modular design for easy maintenance, it meets ASSE 1015, AWWA C510-92, CSA B64.5, UL, and NSF 61-G standards.

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Connectivity & Monitoring

  • This Watts Series LF709-IOT backflow preventer includes integrated pressure sensors at test cocks No. 2, No. 3, and No. 4 for measuring pressure fluctuations.
  • To activate these sensors and transmit data values to a Building Management System (BMS) or Building Automation System (BAS), an add-on monitoring connection kit is required (sold separately).
  • The connection kit communicates over a wired serial (RS-485) interface.
  • The assembly is suitable for installation at cross-connections determined by local inspection authorities as non-health hazards.
  • The 3 inch size is approved for horizontal flow only.
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Additional Details

This 3 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 system. It is ideal for continuous pressure piping applications and cross-connections identified as non-health hazards.

The Watts Series LF709 features a compact, modular design for easy maintenance and in-line repairs. It incorporates advanced pressure-sensing technology and robust corrosion protection.

Features & Technology

  • Lead Free construction ensures less than 0.25% lead content by weight in wetted surfaces.
  • ArmorTek® coating technology utilizes a patented three-part advanced epoxy system to resist both microbial-induced corrosion (MIC) and exposed metal substrate corrosion on internal and external iron components.
  • Smart and Connected technology with integrated pressure sensors at test cocks No. 2, No. 3, and No. 4 measure pressure fluctuations, enabling monitoring and assessment of backflow assembly performance.
  • Requires an add-on monitoring connection kit (available separately) to activate sensors and transmit data to a Building Management System (BMS/BAS) via wired serial (RS-485) interface.
  • Features a modular check design concept for simplified maintenance and assembly, with replaceable stainless steel seats and captured spring assemblies for safety.
  • Equipped with domestic Non-Rising Stem (NRS) resilient seated gate valves.
  • Approved for vertical flow up installation.

Use of integrated pressure sensors and monitoring connection kits does not replace the need to comply with all required installation, operation, and maintenance instructions, codes, and regulations. Watts is not responsible for data transmission failures due to power issues.

Specifications

  • Product Type: Double Check Valve Backflow Preventer
  • Size: 3 inch
  • Inlet/Outlet Connections: Flanged
  • Body Material: Epoxy coated cast iron
  • Coating: ArmorTek powder coating
  • Seat Material: Stainless steel
  • Valve Type: Non-Rising Stem (NRS) resilient seated gate valves
  • Check Module: Two in-line independent positive seating check modules
  • Features: Integrated pressure-sensing test cocks, Modular design, Captured springs, Replaceable check discs and seats

Performance

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range (Continuous): 33°F - 110°F (0.5°C - 43°C)
  • Temperature Range (Intermittent): 140°F (60°C)

Certificates & Approvals

  • ASSE: 1015
  • AWWA: C510-92
  • CSA: B64.5
  • UL Classified: File No. EX3185
  • NSF: Certified to NSF/ANSI 61-G
  • IAPMO: PA 31
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
  • USC Manual for Cross-Connection Control, 8th Edition
  • FM Approved: Horizontal installation (for 2 1/2 inch and 3 inch)

FAQs

What is the primary function of the Watts LF709-NRS-IOT backflow preventer?

Its primary function is to prevent the reverse flow of polluted water from entering into the potable water supply system. It is designed for installations where cross-connections are identified as non-health hazards.

What does "Lead Free" mean for this product?

"Lead Free" signifies that the wetted surface of this product, which comes into contact with consumable water, contains less than 0.25% lead by weight, complying with relevant regulations.

How does the ArmorTek coating protect the valve?

ArmorTek is a patented three-part advanced epoxy coating system applied to the internal and external iron components. It is specifically engineered to reduce microbial-induced corrosion (MIC) and protect against exposed metal substrate corrosion.

How do the integrated pressure sensors (IOT) work, and do I need additional equipment?

The LF709-NRS-IOT model includes integrated pressure sensors at test cocks 2, 3, and 4 to measure pressure fluctuations. To activate these sensors and transmit data to a Building Management System (BMS/BAS), an add-on monitoring connection kit (sold separately) is required.

What are the installation requirements for this 3-inch model?

The 3-inch Watts LF709-NRS-IOT assembly is approved for horizontal flow installations. Always check with local jurisdictional authorities for specific installation requirements and codes.

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