Watts LFMMVM1-CEF 3/4 Lead-Free Thermostatic Mixing Valve, Copper, PEX

The Watts LFMMVM1-CEF 3/4 is a 3/4" lead-free point-of-use thermostatic mixing valve with PEX connections. It blends hot and cold water to hold a field-adjustable outlet temperature of 80°F to 120°F. It is listed to ASSE 1017, ASSE 1069, ASSE 1070. It features a copper body and a epdm seat. Rated to 150 psi. This model is certified lead-free for potable-water installations.

This 3/4 inch lead free thermostatic mixing valve is designed for residential, commercial or institutional environments for supplying baths or lavatories with tempered water. The double throttling design controls both hot and cold water supply to the mixed outlet. It consists of a lead free brass body, cold expansion fitting (CEF/PEX F1960) end connections for PEX-a tubing, solid wax hydraulic principle thermostat, integral filter washers and check valves with a locking mechanism for the temperature setting. The adjustable field range temperature at mixed outlet is 80 to 120 degrees F (27 to 49 degrees C). The maximum pressure rating is 150 psi (10.3 bar).

Features

• Lead free brass construction
• Thermal actuation technology for precise temperature control
• Locking mechanism secures temperature setting
• ASSE 1017, ASSE 1069, ASSE 1070 certified, IAPMO cUPC certified, approved to CSA B125.3 and B125.70

Common Questions

Can I use this at a lavatory — is it ASSE 1070 listed?

Yes. This valve is listed to ASSE 1070, the standard for point-of-use scald protection, so it is legal to install it serving a lavatory, sink or similar fixture. It is also listed to ASSE 1069 for multi-fixture point-of-use service. Because it additionally carries ASSE 1017, the same valve may be used at the water heater as a point-of-distribution tempering valve. Its outlet adjusts from 80°F to 120°F. Note ASSE 1070 does not cover showers — an in-shower device must be ASSE 1016 listed.

What temperature range does it deliver?

The outlet temperature is field-adjustable from 80°F to 120°F. It holds that setting down to 0.5 gpm of flow.

Does it have integral checks?

Yes. Check valves are built into the hot and cold inlets to stop cross-flow between the supplies, along with integral filter washers/screens that keep debris off the thermostat. No separate check valves are needed at the valve.

Can I lock the temperature setting?

Yes. A locking mechanism secures the temperature setting once it is dialed in, so it cannot be moved without deliberately unlocking it.

Specifications

• Type: Mixing/Tempering
• Size: 3/4"
• Connection: PEX
• Body Material: Copper
• Seat / Seal Material: EPDM
• Max Pressure (psi): 150
• Pack Quantity: 12
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LFMMVM1-CEF 3/4
• Certifications: ASSE-1017, ASSE-1069, ASSE-1070, IAPMO
• Lead-Free: Yes
• ASSE Listing: ASSE 1017;ASSE 1069;ASSE 1070
• Install Point: Point of Use
• Outlet Temp — Min (°F): 80
• Outlet Temp — Max (°F): 120
• Minimum Controllable Flow (gpm): 0.5
• Integral Checks & Filter Washers: Yes
• Locking Temperature Adjustment: Yes
• Temperature Gauge Included: No
• Union Connections: Yes
• Applications: Lavatory / Sink;Tub / Shower;Water Heater