3 LF709-NRS-IOT

Item Number: 88003388
1 1
$9,944.21
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Double Check Valve Assembly
  • Size: 3 inch
  • Maximum Working Pressure: 175 PSI
  • Body Material: Epoxy coated cast iron
  • ArmorTek® coating resists corrosion
  • Lead Free* compliant construction
  • Integrated pressure-sensing test cocks
  • NRS resilient seated gate valves

Description

The Watts 3 inch Lead Free LF709-NRS-IOT Double Check Valve Assembly is designed to prevent the reverse flow of polluted water in non-health hazard installations. Featuring a modular check design for easy maintenance and ArmorTek® coating for corrosion resistance, this assembly ensures reliable performance. It includes integrated pressure-sensing test cocks for monitoring system fluctuations, requiring an add-on connection kit for data collection. With a maximum working pressure of 175 PSI and NRS resilient seated gate valves, it provides effective protection against backsiphonage and backpressure in continuous pressure piping applications. Compliant with Lead Free* requirements.

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Monitoring Connection

  • The integrated pressure sensors on test cocks No. 2, No. 3, and No. 4 require an add-on monitoring connection kit to collect data.
  • The add-on connection 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).
  • Data from the sensors, when activated by the kit, can be used for monitoring backflow assembly performance and water supply system conditions.
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Additional Details

The Watts 3 inch Lead Free LF709-NRS-IOT Double Check Valve Assembly prevents the reverse flow of polluted water into potable water systems. It is designed for non-health hazard installations, protecting against backsiphonage and backpressure in continuous pressure piping applications and cross-connections.

This assembly integrates Smart and Connected Technology, featuring pressure-sensing test cocks that measure pressure fluctuations at three points when activated with an add-on monitoring connection kit. This allows for assessment of backflow assembly performance and water supply system conditions between code testing, helping to drive maintenance scheduling.

Features

  • Lead Free* construction for compliance with reduced lead content requirements.
  • Modular check design concept to facilitate complete maintenance and assembly.
  • ArmorTek® coating technology on iron components resists microbial-induced corrosion (MIC) and protects exposed metal substrates.
  • Integrated pressure sensors on test cocks No. 2, No. 3, and No. 4 measure pressure fluctuations.
  • Equipped with Non-rising stem (NRS) resilient seated gate valves.
  • Replaceable stainless steel seats.
  • Maximum flow at low pressure drop.
  • No special tools required for servicing.
  • Captured spring assemblies for safety.
  • Approved for horizontal flow-up installation for 2 1/2 inch and 3 inch sizes.

For Model IOT assemblies, an add-on monitoring connection kit is required to activate and collect data from the integrated pressure sensors. Without this kit, the sensors are passive components and will not communicate with other devices.

Specifications

General

  • Product Type: Double Check Valve Assembly
  • Size: 3 inch
  • Series: LF709-NRS-IOT
  • 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)
  • Lead Content: Wetted surface contains less than 0.25% lead by weight

Materials

  • Check Valve Body: Epoxy coated cast iron
  • Coating: ArmorTek powder coating (internal and external surfaces)
  • Seats: Stainless steel
  • Shutoff Valves: Non-rising stem (NRS) resilient seated gate valves

Certificates & Approvals

  • ASSE No. 1015
  • AWWA C510-92
  • CSA B64.5
  • UL Classified File No. EX3185
  • NSF Certified to NSF/ANSI 61-G
  • IAPMO 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
  • Approved for horizontal flow up installation (2 1/2 inch and 3 inch sizes)
  • FM Approved (for 4 inch - 10 inch vertical "flow up" with OSY gate valves only)

FAQs

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

This assembly is designed to prevent the reverse flow of polluted water from non-health hazard cross-connections into the potable water supply, protecting against backsiphonage and backpressure.

Does this backflow preventer come with an active monitoring system?

The LF709-NRS-IOT model includes integrated pressure-sensing test cocks that measure pressure fluctuations. However, an add-on monitoring connection kit is required to activate these sensors and collect data for transmission to a Building Management System (BMS) or Building Automation System (BAS).

What type of corrosion protection does this assembly feature?

It utilizes ArmorTek® coating technology, a patented three-part advanced epoxy system applied to the iron components. This coating is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates.

What is the maximum operating pressure for this 3-inch assembly?

The Watts 3 inch LF709-NRS-IOT Double Check Valve Assembly has a maximum working pressure of 175 PSI (12.1 bar).

What kind of shutoff valves are included with this assembly?

This assembly is equipped with Non-rising stem (NRS) resilient seated gate valves.