3 LF709-NRS-S-IOT

Item Number: 88003377
1 1
$11,181.75
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Lead Free Construction: Less than 0.25% lead
  • Corrosion Resistance: ArmorTek® coating technology
  • Integrated Pressure-Sensing Test Cocks: Yes
  • Shutoff Valves: Non-Rising Stem (NRS) Gate Valves
  • Modular Check Design: Facilitates maintenance
  • Maximum Working Pressure: 175 PSI
  • Body Material: Epoxy Coated Cast Iron

Description

The Watts Series LF709 is a 3-inch Lead Free double check valve backflow preventer assembly designed to prevent reverse flow of polluted water in non-health hazard cross-connections. Featuring a durable epoxy coated cast iron body and NRS resilient seated gate valves, it offers reliable protection in continuous pressure piping applications. Its advanced ArmorTek® coating technology resists microbial-induced and exposed metal corrosion. Integrated pressure-sensing test cocks allow for performance monitoring with an optional connection kit. This assembly is built for easy maintenance with a modular check design and replaceable stainless steel seats, ensuring long-term service. Item number 88003377.

Help Me Connect

Monitoring Connections

  • The Series LF709 IOT model comes standard with integrated pressure sensors at test cocks No. 2, No. 3, and No. 4.
  • To activate these sensors and transmit data, an add-on monitoring connection kit (sold separately) is required.
  • This connection kit communicates over a wired serial (RS-485) interface and is compatible with most Building Management Systems (BMS) and Building Automation Systems (BAS).
  • The sensors and connection kit provide valuable data for monitoring backflow assembly performance and aspects of the water supply system.
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Additional Details

The Watts Series LF709 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.

This assembly is ideal for protection in continuous pressure piping applications and cross-connections identified as non-health hazards.

Construction & Features

  • Features a fused epoxy coated cast iron body for durability.
  • Equipped with NRS resilient seated gate valves and a strainer.
  • Incorporates a modular check design with a center stem guide for simplified maintenance.
  • Each check module has a captured spring and is accessible through a bolted cover plate.
  • Utilizes advanced ArmorTek® coating technology, a patented 3-part advanced epoxy system, engineered to reduce both microbial-induced corrosion (MIC) and exposed metal substrate corrosion on internal and external surfaces.
  • Lead Free* construction ensures the wetted surface contains less than 0.25% of lead by weight, complying with Lead Free installation requirements.

Smart & Connected Technology

  • Comes standard with pressure-sensing test cocks integrated at test cocks No. 2, No. 3, and No. 4.
  • These sensors measure pressure fluctuations at three locations, enabling monitoring and assessment of backflow assembly performance and the water supply system.
  • An add-on monitoring connection kit (not included) is required to activate the sensors and transmit data to a Building Management System (BMS/BAS) via a wired serial (RS-485) interface.

Specifications

General

  • Product Type: Double Check Valve Backflow Preventer Assembly
  • Series: LF709
  • Size: 3 inch
  • Body Material: Epoxy Coated Cast Iron
  • Coating: ArmorTek® Powder Coating (Internal and External)
  • Seats: Stainless Steel
  • Shutoff Valves: Non-Rising Stem (NRS) Resilient Seated Gate Valves
  • Strainer: FDA Epoxy Coated Strainer
  • Test Cocks: Integrated Pressure-Sensing IoT Test Cocks
  • Lead Content: Less than 0.25% by weight (Lead Free*)

Performance

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

Dimensions & Weight

  • Length (NRS): 24 1/8 inch (613 mm)
  • Weight (NRS): 170 lb (77 kg)

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 the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
  • Installation Orientation: Approved horizontal only (for 2 1/2 inch and 3 inch sizes)

FAQs

What is the primary purpose of the Watts LF709 backflow preventer?

The Watts LF709 3 inch Lead Free double check valve assembly is designed to prevent the reverse flow of polluted water from non-potable sources into the potable water supply system. It is suitable for continuous pressure piping applications and non-health hazard cross-connections.

Is this backflow preventer considered "Lead Free"?

Yes, the Watts LF709 assembly features Lead Free construction, meaning the wetted surfaces that contact consumable water contain less than 0.25% lead by weight, complying with Lead Free installation requirements.

How does the ArmorTek® coating benefit this product?

The ArmorTek® coating is a patented three-part advanced epoxy system applied to the internal and external surfaces. It is engineered to reduce both microbial-induced corrosion (MIC) and general exposed metal substrate corrosion, enhancing the assembly's durability and lifespan.

Can this backflow preventer be monitored for performance?

Yes, the LF709-IOT model comes standard with integrated pressure-sensing test cocks at three locations. With an optional add-on monitoring connection kit (sold separately), these sensors can be activated to collect and transmit data to a Building Management System (BMS) or Building Automation System (BAS) for performance assessment.

What type of shutoff valves are included with this assembly?

This Watts LF709 backflow preventer assembly includes Non-Rising Stem (NRS) resilient seated gate valves.