The Watts 2.5 inch LF709 Lead Free Double Check Valve Backflow Preventer Assembly is engineered 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.

This backflow preventer features integrated pressure-sensing test cocks that measure pressure fluctuations at three points. When activated with an add-on monitoring connection kit, the sensors collect, convert, and transmit data for use in a building management system, aiding in performance assessment between code testing.

Construction & Design

• Features a compact modular design concept for simplified maintenance and assembly, including a single access cover for in-line repairs.
• Constructed with an epoxy coated cast iron body and domestic Non-Rising Stem (NRS) resilient seated gate valves.
• Includes two in-line independent positive seating check modules with captured springs and replaceable check discs and seats.
• Utilizes ArmorTek® coating technology, a patented 3-part advanced epoxy system, designed to limit both microbial induced (MIC) and exposed metal substrate corrosion on internal and external surfaces.
• Lead Free* construction ensures the wetted surface contains less than 0.25% lead by weight, complying with Lead Free installation requirements.

Integrated Technology

• Equipped with Smart and Connected technology (Model IOT) standard, featuring integrated sensors at test cocks No. 2, No. 3, and No. 4.
• Sensors measure pressure fluctuations at three locations to enable monitoring and assessment of backflow assembly performance and the water supply system.

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 that do not communicate with any other device.