Watts 0559122 Mix Valve

The Watts 0559122 LFMMV-UT-M1 is a high-performance 1" thermostatic mixing valve designed for critical temperature control in residential, commercial, and institutional potable water systems. Built with a lead-free cast copper silicon alloy body, this valve utilizes a solid wax hydraulic principle thermostat to maintain outlet temperatures within a tight +/- 3°F tolerance. This model is the professional-grade update for legacy parts including 0206005, LFMMVM1-UT-1, MMV-UT-1, and MMV-UT-M1-1, ensuring seamless integration into existing 1-inch NPT threaded piping configurations.

Engineered for high-demand environments, the LFMMVM1-UT-1 features a double throttling design that simultaneously regulates hot and cold supply ports. This provides superior flow characteristics and a low pressure drop across a range of 0.5 to 20 GPM. For enhanced system protection, the unit includes integral check valves and filter washers to prevent cross-flow between supply lines. The Watts 0559122 is fully compliant with ASSE 1017, ASSE 1069, and ASSE 1070 standards, making it the ideal choice for point-of-source or multi-fixture tempering applications requiring 150 psi maximum operating pressure.

• Universal Compatibility: Direct drop-in replacement for discontinued models 0206005 and MMV-UT-M1-1.
• Advanced Thermal Actuation: Rapid response to pressure and temperature fluctuations via copper thermostat assembly.
• Tamper-Resistant Control: Includes an adjustment cap with a locking feature to prevent unauthorized setpoint drift.
• Lead-Free Reliability: Constructed from silicon alloy to meet strict potable water safety regulations.
• System Protection: Built-in filter washers and check valves minimize maintenance by capturing debris and preventing backflow.

Is the 0559122 the correct replacement for the MMV-UT series?
Yes, the 0559122 LFMMV-UT-M1 is the updated, lead-free version of the original MMV-UT-M1 and MMV-UTnd-1 models. It maintains the same 1-inch union threaded dimensions for quick installation.

What is the temperature adjustment range?
The valve is field-adjustable to provide tempered water between 80°F and 120°F (27°C to 49°C), with a factory setpoint of 105°F.

Does this valve protect against thermal shock?
Yes, the double-throttling thermostat design is engineered to restrict mixed water flow rapidly if the cold water supply is lost, helping to prevent scalding.

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.