Watt LFMMVM1-UT 3/4" Mixing Valve Lead Free Temperature Regulation

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.

4.5/5

Product ID: 733093789

Secure Transaction

Details

Material
Alloy Copper
Brand
Watts
Item dimensions L x W x H
16 x 11.4 x cm
Exterior Finish
Copper
Inlet Connection Size
0.75 インチ
Inlet Connection Type
Threaded

🔒Locking adjuster cap for safety

⚙️3/4" lead-free brass body

🌡️Precise thermostat control 27-49°C

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 — the smart valve for savvy spaces!

LEAD FREE DURABILITY - Premium brass alloy ensures safe, corrosion-resistant performance for every installation.
CERTIFIED RELIABILITY - Meets ASSE 1070, 1069, 1017 standards for trusted residential and commercial use.
SECURE LOCKING MECHANISM - Adjuster cap with lock function prevents accidental changes, guaranteeing consistent settings.
PRECISION TEMPERATURE CONTROL - Thermostat technology finely tunes water temperature between 27°C and 49°C for ultimate comfort.
INTEGRATED FILTRATION CHECK VALVE - Built-in filter washer and check valve protect your system from debris and backflow.

The Watts LFMMVM1-UT 3/4" Mixing Valve is a lead-free brass thermostat valve designed for precise temperature regulation in residential, commercial, and institutional settings. Featuring a locking adjuster cap, integrated filter washer, and check valve, it ensures safe, reliable tempered water delivery between 27°C and 49°C, with a maximum pressure rating of 150 PSI. Certified to ASSE standards, it combines durability, safety, and performance for modern plumbing needs.

Specifications

Brand	Watts
Model Number	LFMMV-M1-UT
Product Dimensions	16 x 11.43 x 6.6 cm; 1.01 kg
Material	Alloy, Copper, Lead
Are Batteries Included	No
Usage	スレッド式
Item Weight	1.01 Kilograms

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?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Trustpilot

TrustScore 4.5 | 7,300+ reviews