8 LF709-DNRS-IOT

Item Number: 88003397
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$39,656.51
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 8 inch
  • Lead Free* construction for potable water systems
  • ArmorTek® advanced epoxy coating resists corrosion
  • Integrated pressure-sensing test cocks for monitoring
  • Modular design for simplified maintenance
  • Replaceable stainless steel seats and check discs
  • Domestic Non-Rising Stem (NRS) gate valves
  • Maximum Operating Pressure: 175 psi

Description

The 8 inch Watts LF709-DNRS-IOT is a Lead Free double check valve backflow preventer assembly designed to prevent polluted water from entering potable water systems due to backsiphonage or backpressure. Featuring a modular design for easy maintenance and an ArmorTek® three-part epoxy coating to resist microbial-induced corrosion, this assembly ensures long-lasting performance. Integrated pressure-sensing test cocks allow for advanced monitoring of assembly performance when connected to an optional kit, providing valuable data for maintenance scheduling. It is rated for a maximum operating pressure of 175 psi and includes domestic non-rising stem gate valves. Item number 88003397.

Help Me Connect

This 8 inch LF709-DNRS-IOT backflow preventer assembly is designed for installation at cross-connections where prevention of polluted water backflow into the potable water supply is required, specifically in non-health hazard situations. It is approved for use in continuous pressure piping applications.

  • Installation: This assembly can be installed in both horizontal positions and for vertical "flow up" installations (for sizes 4" to 10"). Always consult local jurisdictional authorities for specific installation requirements and codes.
  • Monitoring: The integrated pressure-sensing test cocks are passive components that require an add-on monitoring connection kit (sold separately) to collect and transmit data to a Building Management System (BMS) or Building Automation System (BAS) via a wired serial (RS-485) interface. This kit allows for monitoring of assembly performance between required code testing.
  • Compatibility: Ensure that the chosen connections for installation match the 8-inch nominal size of the assembly.
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Additional Details

This 8 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 supply due to backsiphonage or backpressure. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as non-health hazards.

The LF709-DNRS-IOT features a compact modular design that facilitates easy maintenance with a single access cover for in-line repairs. Its robust construction includes an epoxy coated cast iron body and domestic NRS resilient seated gate valves, ensuring reliable performance in demanding environments.

Advanced Protection

  • Equipped with ArmorTek® coating technology, a patented three-part advanced epoxy system, engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates.
  • Features two in-line independent positive seating check modules with captured springs and replaceable check discs and seats for enhanced safety and serviceability.
  • Lead Free* construction complies with current lead-free installation requirements, ensuring safe contact with potable water.

Smart Monitoring Capabilities

  • Integrated pressure-sensing test cocks (at No. 2, No. 3, and No. 4 locations) measure pressure fluctuations.
  • When activated with an add-on monitoring connection kit (sold separately), the sensors transmit data via a wired serial (RS-485) interface to building management systems (BMS/BAS).
  • This technology enables monitoring and assessment of backflow assembly performance and water supply system conditions between code-required testing.

NOTICE: Use of integrated pressure sensors and the monitoring connection kit does not replace compliance with all required instructions, codes, and regulations related to installation, operation, and maintenance of the backflow preventer.

Specifications

  • Product Type: Double Check Valve Assembly
  • Nominal Size: 8 inch
  • Model Series: LF709-DNRS-IOT
  • Inlet/Outlet Shutoff Valves: Domestic Non-Rising Stem (NRS) Resilient Seated Gate Valves
  • Body Material: Fused Epoxy Coated Cast Iron
  • Coating: ArmorTek® Powder Coating, 3-Part Advanced Epoxy System
  • Seats: Replaceable Stainless Steel
  • Checks: Two In-line Independent Positive Seating Check Modules
  • Test Cocks: Top Mounted, Integrated Pressure-Sensing Test Cocks (No. 2, No. 3, No. 4)
  • Maximum Operating 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 No. 1015
  • AWWA C510-92
  • CSA B64.5
  • UL Classified File No. EX3185
  • Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
  • IAPMO PA 31
  • USC Manual for Cross-Connection Control, 8th Edition
  • NSF Certified to NSF/ANSI 61-G
  • FM Approved
  • Lead Free* Construction

FAQs

What is the primary function of the Watts 8 inch LF709-DNRS-IOT backflow preventer?

Its primary function is to prevent the reverse flow of polluted water from entering a potable water supply system. This protects against backsiphonage and backpressure in non-health hazard installations and continuous pressure piping applications.

What does the "Lead Free" designation mean for this product?

The "Lead Free" designation indicates that the wetted surface of this product, which contacts consumable water, contains less than 0.25% lead by weight. This ensures compliance with modern plumbing codes for potable water systems.

How does ArmorTek® coating enhance the durability of this assembly?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the cast iron body and internal components. It is specifically engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, significantly extending the assembly's lifespan.

Can the Watts LF709-DNRS-IOT be installed vertically?

Yes, for sizes 4 inches to 10 inches, including this 8-inch model, the assembly is approved for both horizontal installation and vertical "flow up" installations. Always check with local authorities for specific installation requirements.

What components are included with the LF709-DNRS-IOT assembly?

The assembly includes a fused epoxy coated cast iron body, domestic NRS resilient seated gate valves, top-mounted integrated pressure-sensing test cocks, two in-line independent positive seating check modules, captured springs, and replaceable check discs and seats.

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