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Watts - LFMMV-M1-UT - 3/4 Union Inlet Type Thermostatic Mixing Valve,No Lead Copper Silicon Alloy, 13 gpm

Q: What is the min./max. Pressure for both inlets? And is there a drop in outlet pressure?

30-150 psi operating pressure. Negligible pressure drop.

Q: What is the min./max. hot water temp. inlet? and how it will work if the hot temp. drop below the min.?

Min/Max HW inlet temp= 120 to 180 degrees. If the HW inlet water temp is below 120 the valve will simply pass cold water. The max pressure for both inlets is 150 PSI. There is no listed minimum pressure. Pressure drop varies with flow- at 6 GPM flow the pressure drop is 10 PSI.

Q: My solar hot water will be feeding my electric tankless heater. This should drop the water from 180 to 120 degree before tankless heater right?

Yes- but a couple of cautions. The maximum outlet temperature setting is 120 degrees, and the maximum inlet hot water temp to get that 120 degrees is 180 degrees. The valve is rated to still function at 200 degree inlet temp but at anything over 180 you will likely end up with an outlet temp over 120.

Q: The temperature adjustment knob will not turn. Is there a lock or trick to this?

To adjust the setting of the valve, loosen locking cap screw with hex wrench, see Figure 3. Cap must be lifted 1/4" to adjust temperature. To increase the temperature, turn counterclockwise. To decrease temperature turn clockwise. 4. Lower handle and tighten screw.

Product ID: 24321116

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Details

Material
Lead Free
Brand
Watts
Item dimensions L x W x H
6.3 x 4.5 x
Exterior Finish
Copper
Inlet Connection Type
threaded
Outlet Connection Type
Threaded

🔒Locking temp adjustment

⚙️13 GPM flow rate

🛡️150 PSI max pressure

Frequently Bought Together

Watts - LFMMV-M1-UT - 3/4 Union Inlet Type Thermostatic Mixing Valve,No Lead Copper Silicon Alloy, 13 gpm

MEASUREMAN Tridicator, Thermo-Manometer Pressure Gauge, 2-1/2", 0-160psi/30-250 deg F, Stainless Steel Case, 1/4" NPT Back Mount

MEANLIN Stainless Steel Thermal Pressure Gauge 0-160Psi, 30-250F, 2.5" Face Dial, Liquid Filled, 1/4" NPT, Back Mount

Description

🔥 Mix it right, lock it tight! 🔒

BUILT TO LAST - Integral filter washers and check valves protect your system from debris and backflow.
LOCK SECURE - Temperature adjustment cap with locking feature prevents accidental changes—set it and forget it.
LEAD FREE SAFETY - Crafted from lead-free copper silicon alloy for eco-friendly, health-conscious installations.
CERTIFIED RELIABILITY - Meets ASSE 1070, 1069, 1017 standards for trusted performance in any setting.
PRECISION THERMAL CONTROL - Solid wax hydraulic thermostat ensures exact temperature mixing every time.

The Watts LFMMV-M1-UT is a 3/4" lead-free thermostatic mixing valve designed for residential and commercial use, delivering up to 13 gallons per minute of precisely tempered water. Featuring a durable copper silicon alloy body, a solid wax hydraulic thermostat, and a locking temperature adjustment, it ensures safe, consistent water temperature with a maximum pressure rating of 150 PSI. Certified to ASSE standards, it combines reliability, safety, and ease of use in one compact valve.

Specifications

Material	Lead Free Copper Silicon Alloy
Brand	Watts
Item dimensions L x W x H	6.3 x 4.5 x 2.6 inches
Exterior Finish	Copper
Inlet Connection Type	threaded
Outlet Connection Type	Threaded
Maximum Operating Pressure	150 Pound per Square Inch
Number of Ports	1
Outlet Connection Size	4.5 Inches
Manufacturer	WATTS
UPC	098268451825
Part Number	LFMMVM1-UT
Item Weight	2.23 pounds
Product Dimensions	6.3 x 4.5 x 2.6 inches
Item model number	LFMMV-M1-UT
Is Discontinued By Manufacturer	No
Size	4.5 inches x 6.3 inches x 2.6 inches
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

Have a Question? See What Others Asked

What is the min./max. Pressure for both inlets? And is there a drop in outlet pressure?

What is the min./max. hot water temp. inlet? and how it will work if the hot temp. drop below the min.?

My solar hot water will be feeding my electric tankless heater. This should drop the water from 180 to 120 degree before tankless heater right?

The temperature adjustment knob will not turn. Is there a lock or trick to this?

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