Watts 0559106 Valve

The Watts 0559106 is a professional-grade 1 inch LF1170-M2-UT thermostatic mixing valve engineered for high-demand potable water and radiant heat applications. This lead-free brass mixing valve utilizes a sophisticated solid wax hydraulic principle thermostat to maintain precise discharge temperatures despite fluctuations in supply. Featuring a double throttling design, the unit simultaneously modulates hot and cold 1-inch inlets to provide a sensitive, rapid response to temperature changes within the mixing chamber. With an adjustable temp range of 90-160°F and a max pressure of 150 psi, it is designed for installation at the water source to temper domestic hot water effectively. The unthreaded union (-UT) connections simplify installation for contractors, while integral check valves and filter washers prevent cross-flow between supply lines. This ASSE 1017 listed valve ensures a maximum flow rate of 23 GPM, making it a reliable choice for commercial and residential mechanical rooms.

• Double Throttling Design: Provides precise temperature control by modulating both hot and cold water flows for consistent discharge.
• System Protection: Includes integral check valves and stainless steel filter washers to eliminate cross-flow and protect your plumbing system.
• Fail-Safe Operation: Automatically restricts output to a drip if the cold water supply is lost, preventing high-temperature delivery.
• Corrosion Resistance: Lead-free cast copper silicon alloy body construction ensures long-term durability in aggressive water conditions.
• Locking Mechanism: Hand-adjustable cap features a locking nut to secure your specific temperature setpoint and prevent tampering.

Is this valve suitable for point-of-use tempering?
This is an ASSE 1017 master mixing valve intended for point-of-source applications. For point-of-use protection at individual fixtures where ASSE 1070 is required, additional tempering valves must be installed.

What is the minimum flow required for the thermostat to react accurately?
The LF1170-M2 series is capable of accurately controlling temperatures with a minimum flow rate as low as 0.5 GPM, accommodating low-flow fixtures without losing thermal control.

Can I use this for a radiant heating manifold?
Yes, the 90°F to 160°F temperature range and high flow capacity make this thermostatic mixing valve an industry standard for managing supply temperatures in hydronic radiant floor systems.

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.