6 LF709-DNRS-IOT

Item Number: 88003396
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$18,619.34
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 6 inch
  • Lead Free Construction
  • Max Working Pressure: 175 PSI
  • ArmorTek® Coated Cast Iron Body
  • Integrated Pressure-Sensing Test Cocks (IOT)
  • Domestic Non-Rising Stem (NRS) Gate Valves
  • Replaceable Stainless Steel Seats
  • Modular Design for Easy Maintenance

Description

The Watts 6 inch LF709-NRS-IOT is a Lead Free double check valve backflow preventer assembly designed to prevent polluted water from entering potable water systems. It features an epoxy coated cast iron body with ArmorTek® coating for superior corrosion resistance and domestic non-rising stem gate valves. Integrated pressure-sensing test cocks allow for monitoring pressure fluctuations when activated by an add-on connection kit, aiding in performance assessment and maintenance scheduling. This modular assembly is suitable for non-health hazard cross-connections and continuous pressure piping applications, offering easy in-line repairs and maximum flow at low pressure drop. Item number 88003396.

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Monitoring Connection

This Watts LF709-NRS-IOT backflow preventer features integrated pressure-sensing test cocks designed for use with an add-on monitoring connection kit. The kit is required to activate the sensors and transmit data, which can then be used in a Building Management System (BMS) or Building Automation System (BAS) via a wired serial (RS-485) interface. This technology enables monitoring and assessment of backflow assembly performance and water supply system conditions.

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Additional Details

The 6 inch Watts Series LF709 Lead Free Double Check Valve Assembly is designed to prevent the backflow of polluted water from entering into the potable water supply.

This backflow preventer is ideal for non-health hazard installations in continuous pressure piping applications.

Key Features

  • Features a modular check design concept for simplified maintenance and assembly.
  • Equipped with integrated pressure-sensing test cocks (Model IOT) to measure pressure fluctuations at three locations.
  • Components are coated with ArmorTek®, a patented three-part advanced epoxy system engineered to resist microbial-induced corrosion (MIC) and protect exposed metal surfaces.
  • Constructed with Lead Free* materials to comply with relevant installation requirements.
  • Utilizes domestic NRS resilient seated gate valves.
  • Designed for maximum flow at low pressure drop.
  • Features replaceable stainless steel seats and captured spring assemblies for safety.
  • Approved for vertical flow up installation (for 4" to 10" sizes).

An add-on monitoring connection kit is required to activate the pressure sensors and transmit data; without it, the sensors are passive. Always consult local authorities and read all installation instructions for proper use and compliance.

Specifications

General

  • Product Type: Double Check Valve Assembly
  • Size: 6 inch
  • Model: LF709-NRS-IOT
  • 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)
  • Valve Type: Non-Rising Stem (NRS) Gate Valves

Materials

  • Check Valve Body: Epoxy Coated Cast Iron
  • Seats: Stainless Steel
  • Coating: ArmorTek® Powder Coating (applied to internal and external surfaces)
  • Check Modules: Two in-line independent positive seating
  • Check Discs: Replaceable

Monitoring

  • Sensors: Integrated pressure-sensing test cocks (No. 2, No. 3, No. 4)
  • Connectivity: Requires add-on monitoring connection kit (wired serial RS-485 interface, compatible with Building Management/Automation Systems)

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
  • Flow Approval: Horizontal and vertical "flow up" (for 6 inch sizes)
  • FM Approved: 4" to 10" vertical "flow up" (with OSY gate valves only)

FAQs

What type of backflow prevention does this assembly provide?

This is a double check valve assembly designed to prevent the backflow of polluted water due to backsiphonage or backpressure into the potable water supply. It is used in non-health hazard installations.

Is this 6-inch LF709 model certified Lead Free?

Yes, the Watts Series LF709 features Lead Free construction, meaning the wetted surface of the product contains less than 0.25% of lead by weight, complying with Lead Free installation requirements.

What is the purpose of the integrated pressure-sensing test cocks (IOT feature)?

The integrated pressure-sensing test cocks measure pressure fluctuations at three locations within the assembly. When activated by an add-on monitoring connection kit, this data can be transmitted to a Building Management System for performance monitoring and maintenance assessment.

What is ArmorTek® coating and why is it used?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the iron components of the backflow preventer. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the durability and lifespan of the assembly.

What are the maximum operating pressure and temperature limits for this assembly?

The maximum working pressure for this 6-inch LF709 assembly is 175 PSI (12.1 bar). It can handle continuous temperatures ranging from 33°F to 110°F (0.5°C to 43°C) and intermittent temperatures up to 140°F (60°C).

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