Product Overview

Applications
The LFMMV-M1 Thermostatic Mixing Valves are ideal for supply-
ing sinks, baths, showers or lavatories with tempered water. The
LFMMV-M1 valves can be used in residential, commercial and
institutional environments. These thermostatically modulated mixing
valves can be used anywhere preset water temperature is required
for point-of-use installations such as in homes, schools, restaurants,
hospitals, beauty salons, and public restrooms. The LFMMV-M1 is
provided with an adjustment cap that includes a locking feature.
The LFMMV-M1 valves should be used prior to the fixture to reduce
the hot water supply to a safe temperature.
Materials
Body: Lead Free* cast copper silicon alloy
Disc: Stainless steel
Thermostat Assembly: Copper
O-rings: Buna-N; EPDM
Pistons: Polysulfone (PSU)
Springs: Stainless Steel
Capacity**
kpa psi
345 50
276 40
207 30
138 20
69 10
0
0 2 4 6 8 10 12 14 gpm
7.6 15 23 30 38 46 53 lpm
Pressure Drop
Flow
Flow curves are for reference. Actual flows may vary
depending on system temperatures and/or pressures.
**Flow curve with integral inlet filters and check valves
Certified to
NSF/ANSI 61-G & 372
Basic Construction
INLET
FILTER
WASHER
BUTTON HEAD SCREW
LOCKING
ADJUSTMENT CAP
ADAPTER
O-RING
STEM ASSEMBLY
O-RING
O-RING
PLUNGER
SEAT
SPRING
THERMOSTAT
FUNNEL
UNION NUT
TAILPIECE
CHECK MODULE
BODY
BONNET ASSEMBLY
FILTER WASHER
FIBER WASHER
Pressure –– Temperature –– Flow Rate
Minimum Supply Pressure Static: 30psi (207 kPa)
Inlet Temperatures: hot inlet, 120°F – 180°F (49°C – 82°C),
cold inlet, 39°F – 85°F (4°C – 29°C)
Hot Water Inlet to Outlet Differential Temperature: 5°F (3°C)
above set point
Temperature Out: Field range: 80°F – 120°F (27°C – 49°C),
adjustable. Accurate within ±3°F (1.7°C)
Maximum Temperature: 200°F (93°C)
Maximum Pressure: 150psi (1034 kPa)
Minimum Flow: 0.5 gpm (1.9 lpm) @ 0.8psi (0.55 kPa)†
Maximum Flow: 20 gpm (76 lpm) @ 125psi (862 kPa)†
Maximum Pressure Differential between Hot & Cold Water
Supplies: 25%
Standards
Tested and Certified by NSF International
Listing: ASSE 1017, ASSE 1069, ASSE 1070 and IAPMO cUPC
†
When tested in accordance with ASSE 1017, ASSE 1069 & ASSE 1070
Viega Pro-Press™ connections are optional factory installed fitting on each
end of the approved/certified assembly.