8 LF709-NRS-IOT

Item Number: 88003390
1 1
$37,055.37
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 8 inch
  • Product Type: Double Check Valve Assembly
  • Maximum Operating Pressure: 175 PSI
  • Wetted Surface Lead Content: Less than 0.25%
  • Body Material: Epoxy coated cast iron
  • Coating: ArmorTek® advanced epoxy system
  • Valves: Non-rising stem (NRS) gate
  • Features integrated pressure sensors for monitoring

Description

The Watts 8 inch LF709-NRS-IOT Lead Free Double Check Valve Assembly prevents backflow of polluted water into potable systems, suitable for non-health hazard cross-connections. Featuring a durable epoxy coated cast iron body and non-rising stem gate valves, it offers a maximum operating pressure of 175 PSI. The assembly incorporates Smart and Connected technology with integrated pressure-sensing test cocks, allowing performance monitoring when activated with an optional connection kit. Its modular design ensures easy maintenance, and ArmorTek® coating resists corrosion. This 8-inch backflow preventer is approved for vertical flow up installation and meets ASSE 1015, AWWA C510-92, and CSA B64.5 standards, ensuring compliance and reliability.

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Installation & Application

The 8 inch Watts Series LF709-NRS-IOT Double Check Valve Assembly is designed for installation on cross-connections to prevent the backflow of polluted water into the potable water supply. It is suitable for non-health hazard installations where approved by the local authority having jurisdiction. This assembly can be installed for vertical flow up applications. Always consult local governing authorities for specific installation requirements.

Smart & Connected Monitoring

This Model IOT assembly includes integrated pressure-sensing test cocks (No. 2, No. 3, and No. 4) that measure pressure fluctuations. To activate these sensors and enable data collection, an add-on monitoring connection kit is required. This kit communicates over a wired serial (RS-485) interface and is compatible with most Building Management Systems (BMS) and Building Automation Systems (BAS). Without the connection kit, the sensors remain passive components.

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Additional Details

The 8 inch Watts Series LF709-NRS-IOT Lead Free Double Check Valve Assembly is designed to prevent the reverse flow of polluted water into potable water systems. It is suitable for continuous pressure piping applications and cross-connections identified as non-health hazards, as approved by local authorities having jurisdiction.

This assembly features Smart and Connected technology with integrated pressure-sensing test cocks for monitoring performance. It is built with a fused epoxy coated cast iron body and NRS resilient seated gate valves.

Features

  • Modular check design facilitates complete maintenance and assembly by retaining the spring load.
  • Integrated pressure sensors on test cocks No. 2, No. 3, and No. 4 measure pressure fluctuations.
  • Sensors are activated with an add-on monitoring connection kit (BMS/BAS only) to collect and transmit data to a building management system.
  • Replaceable stainless steel seats ensure durability.
  • Offers maximum flow at low pressure drop.
  • ArmorTek® coating technology resists corrosion of internals, including microbial-induced corrosion (MIC).
  • No special tools are required for servicing.
  • Captured spring assemblies enhance safety.
  • Approved for vertical flow up installation.
  • Lead Free* construction complies with installation requirements.

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

Specifications

  • Product Type: Double Check Valve Assembly
  • Size: 8 inch
  • Model: LF709-NRS-IOT
  • Application: Non-health hazard installations, continuous pressure piping
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F - 110°F (0.5°C - 43°C) continuous, 140°F (60°C) intermittent
  • Wetted Surface Lead Content: Less than 0.25% (Lead Free)

Materials

  • Check Valve Body: Epoxy coated cast iron
  • Seats: Stainless steel
  • Internal/External Coating: ArmorTek® powder coating (patented three-part advanced epoxy system)
  • 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
  • Approved by the 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

FAQs

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

Its primary function is to prevent the reverse flow of polluted water from non-potable sources into the potable water supply due to backsiphonage or backpressure. It is designed for non-health hazard installations.

What type of shutoff valves does this assembly use?

The Watts LF709-NRS-IOT assembly utilizes non-rising stem (NRS) resilient seated gate valves for shutoff.

Does this backflow preventer have monitoring capabilities?

Yes, it features Smart and Connected technology with integrated pressure-sensing test cocks (No. 2, No. 3, and No. 4) to measure pressure fluctuations. An add-on monitoring connection kit is required to activate the sensors and transmit data to a building management system.

What is ArmorTek® coating technology?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the internal and external surfaces of the cast iron body. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates.

What is the maximum operating pressure for this 8-inch assembly?

This 8-inch double check valve assembly has a maximum operating pressure of 175 psi (12.1 bar).