Watts 0559119 Valve

The Watts 0559119 (Model LFMMVM1-UT) is a lead-free thermostatic mixing valve designed for professional contractors who require precise tempering in residential, commercial, or institutional settings. Featuring a 3/4-inch union thread connection, this valve utilizes a solid wax hydraulic principle thermostat to ensure reliable hot and cold water blending. The double throttling design is a critical technical advantage, as it regulates both supply inlets simultaneously to maintain a consistent mixed outlet temperature, even during pressure fluctuations. With a flow rate range of 0.5 to 20 GPM and a maximum pressure rating of 150 psi, this ASSEM 1070 and ASSE 1017 certified component is built for versatility across various point-of-use and point-of-source applications. The lead-free copper silicon alloy construction ensures compliance with strict potable water regulations, while integral check valves and filter washers prevent cross-flow and debris-related failures. This field-adjustable unit operates within a temperature range of 80°F to 120°F, providing accurate thermal control for high-demand environments.

• Precise Thermal Control: The double throttling mechanism provides an accurate temperature response of +/- 3°F, minimizing scalding risks and ensuring user safety.
• Lead-Free Compliance: Constructed from a copper silicon alloy body to meet all federal and state potable water requirements for lead-free installation.
• Integrated Protection: Features integral check valves and stainless steel filter washers to protect the internal thermostat and prevent cross-contamination between hot and cold lines.
• Versatile Installation: Triple-listed under ASSE 1017, ASSE 1069, and ASSE 1070, making it suitable for single fixtures, multiple fixtures, or hot water source applications.
• Locking Mechanism: The adjustment cap includes a locking feature to secure the temperature setting and prevent unauthorized field tampering.

Is the Watts LFMMV-UT-M1 suitable for low-flow applications?
Yes, its advanced internal design supports low flow rates as low as 0.5 GPM, making it ideal for high-efficiency sensor faucets and water-saving fixtures without losing temperature stability.

Can this valve be installed in any orientation?
While the valve can physically be installed in various positions, technical best practice dictates cleaning and accessibility for the union connections and filter washers. Always ensure the "H" (Hot), "C" (Cold), and "M" (Mixed) ports are piped correctly to the supply lines.

What are the requirements for effective temperature mixing?
To ensure the solid wax thermostat functions correctly, a minimum differential of 5°F is generally required between the hot water inlet and the desired mixed outlet temperature.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.