WATTS Mixing Valves

Used with water heaters to mix hot and cold water for a safer outlet temperature and to prevent scalding & thermal shock. Follow ASSE and CSA standards and have a maximum flow rate of 23 gpm

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Watts mixing valves are constructed in accordance with American Society of Sanitary Engineering (ASSE) standards 1016, 1017, 1069 and 1070. These lead-free valves are used for mixing cold & hot...Read more
WATTS -

LF1170 Series Master Mixing Valves

StyleModelBody MaterialFlow RateInlet ConnectionInlet SizeInlet TypeItemMfr. SeriesOutlet ConnectionPrice (inc. VAT)
ALF1170M2-CPVC 3/4-----Control ValveLF1170-£543.66
BLF1170M2-UT (W/PRESS) 1/2-0.5 to 23 gpmPress1/2"-Control ValveLF1170Press£273.20
CLFL1170M2-PEX 3/4-----Control ValveLFL1170-£543.66
CLFL1170M2-PEX 1-----Control ValveLFL1170-£675.73
DLF1170M2-QC 3/4-----Control ValveLF1170-£580.71
ALFL1170M2-CPVC 1/2-----Control ValveLFL1170-£414.77
DLFL1170M2-QC 1/2-----Control ValveLFL1170-£451.05
E1/2 LF1170M2-UT-PRESS-----Mixing Valve--£383.76
E1 LF1170M2-UT-PRESS-----Mixing Valve--£435.01
FLF1170M2-US 3/4-----Control ValveLF1170-£272.84
GLF1170M2-CPVC 1/2-0.5 to 23 gpmUnion CPVC1/2"-Control ValveLF1170Union CPVC£414.77
HLFL1170M2-US 1-0.5 to 23 gpmUnion Solder1"-Control ValveLFL1170Union Solder£675.73
FLFL1170M2-US 3/4-----Control ValveLFL1170-£543.66
DLFL1170M2-QC 1-----Control ValveLFL1170-£712.78
HLF1170M2-US 1-0.5 to 23 gpmSocket1"-Control ValveLF1170Socket£577.16
DLF1170M2-QC 1-----Control ValveLF1170-£712.78
ILFL1170M2-UT 3/4-----Control ValveLFL1170-£543.66
ILFL1170M2-UT 1/2-----Control ValveLFL1170-£414.77
CLF1170M2-PEX 3/4-----Control ValveLF1170-£543.66
DLF1170M2-QC 1/2-----Control ValveLF1170-£451.05
ALFL1170M2-CPVC 1-----Control ValveLFL1170-£675.73
DLFL1170M2-QC 3/4-----Control ValveLFL1170-£580.71
ILFL1170M2-UT 1-----Control ValveLFL1170-£675.73
HLFL1170M2-US 1/2-0.5 to 23 gpmUnion Solder1/2"-Control ValveLFL1170Union Solder£414.77
JLF1170M2-PEX 1-0.5 to 23 gpmCrimped1"-Control ValveLF1170Crimped£675.73
StyleModelInlet SizeOutlet SizeOverall HeightOverall WidthPrice (inc. VAT)
A00062741"1"5 13/16"5 11/16"£281.83
A00062721/2"1/2"5 5/16"4.75"£236.70
A00062733/4"3/4"5 9/16"5.25"£253.77
WATTS -

LFN170 CSUT Series Mixing Valves

StyleModelPrice (inc. VAT)
ALFN170M3-CSUT 3/4£2,277.71
RFQ
BLFN170M3-CSUT 1 1/4£3,463.29
RFQ
BLFN170M3-CSUT 1 1/2£3,848.29
RFQ
CLFN170M3-CSUT 1£2,596.67
RFQ
BLFN170M3-CSUT 2£5,397.90
RFQ
WATTS -

LFUSG-B Series Mixing Valves

StyleModelPrice (inc. VAT)
ALFUSG-B-M2£185.59
BLFUSG-B-SC M3£374.52
WATTS -

Mixing Valves

StyleModelPrice (inc. VAT)
A3/4 LF 1170-UT- M2 3/4"£340.13
B1/2 LF MMV-US£231.45
C3/4 LF 1170 PEX£273.56
StyleModelPrice (inc. VAT)
A105-
RFQ
A115-
RFQ
A205£560.60
RFQ
WATTS -

LF70A Series Mixing Valves

StyleModelFlow RateHot Inlet Temperature RangeInlet ConnectionInlet SizeOutlet ConnectionOutlet SizeOutlet TypeOverall HeightPrice (inc. VAT)
ALF70AT 3/4-----3/4"Female Threaded-£350.35
BLFL70AT 1/2-100 to 130° FFemale Threaded1/2"Female Threaded1/2"Female Threaded-£333.44
BLF70AT 1/2-120 to 160° FFemale Threaded1/2"Female Threaded1/2"Female Threaded-£286.73
CLFL70A 3/4-----3/4"Socket-£368.88
DLFL70A-F 1/2-100 to 130° FSocket1/2"Socket1/2"Socket-£318.96
ALFL70AT 3/4-----3/4"Female Threaded-£411.57
ELF70A-F 1/25.5 gpm at 10 psi--1/2"-1/2"Sweat3 11/16"£100.60
FLF70A 3/410 gpm at 10 psi--3/4"-3/4"Sweat4.125"£149.91
WATTS -

Mixing Valve, Brass

StyleModelFlow RateInlet SizeInlet TypeOutlet SizeOutlet TypeOverall HeightOverall WidthTemp. RangePrice (inc. VAT)
A3/4 LF MMV-US0.5 to 20 gpm3/4"Solder3/4"Solder5.437"4.875"80 Degrees to 120 Degrees F£268.79
B1/2 LF 1170-US0.5 to 23 gpm1/2"Solder1/2"Solder5.437"4.875"90 Degrees to 160 Degrees F£262.68
B3/4 LF 1170-US0.5 to 23 gpm3/4"Solder3/4"Solder5.437"4.875"90 Degrees to 160 Degrees F£294.42
C1/2 LF 1170-UT-2 1/2"0.5 to 23 gpm1/2"Fnpt1/2"FNPT5.437"4.875"90 Degrees to 160 Degrees F£268.36
D1 LF MMV-PEX20 gpm at 125 psi1"PEX1"PEX5.875"5.875"80 Degrees to 120 Degrees F£178.02
D1/2 LF MMV-PEX20 gpm at 125 psi1/2"PEX1/2"PEX5 9/16"5.25"80 Degrees to 120 Degrees F£250.91
D3/4 LF MMV-PEX20 gpm at 125 psi3/4"PEX3/4"PEX5 11/16"5.5"80 Degrees to 120 Degrees F£223.00
WATTS -

Thermostatic Mixing Valve, Lead Free Copper Silicon Alloy

Watts thermostatic mixing valves regulate the water temperature by mixing cold and hot water simultaneously. Watts valves are used with boiler and tempered water systems for in-floor radiant heating, soil heating, emergency shower and municipal water processing applications. These thermostatic mixing valves allow the water heater to operate at higher temperatures, extending the effective system flow rate at the valve output. This feature increases productivity. Watts mixing valves are made of lead-free copper silicon alloy to facilitate excellent manufacturing capabilities for forging, casting & machining material stocks. Watts thermostatic mixing valves reduce the size / BTU requirements, providing capacity for peak system demands. These UPC-listed valves deliver a maximum flow rate of 23 gpm and are capable of withstanding temperatures & pressures up to 160 degrees F & 150 psi, respectively. Choose from a wide range of these thermostatic mixing valves, available in union, solvent weld, quick connect and compression inlet options on Raptor Supplies. Watts heavy duty float valves and adjustable pressure relief valves are also available for various commercial water supply regulation applications.

StyleModelInlet SizeOutlet SizeOverall HeightOverall WidthPrice (inc. VAT)
A00062711"1"5 13/16"5 11/16"£404.62
A00062691/2"1/2"5 5/16"4.75"£156.66
A00062703/4"3/4"5 9/16"5.25"£199.55
WATTS -

LFMMV Series Lavatory Mixing Valves

StyleModelCapacityFlow RateInlet ConnectionInlet SizeInlet TypeItemOutlet ConnectionOutlet SizePrice (inc. VAT)
A1 LFMMVM1-UT-PRESS-----Mixing Valve--£467.83
BLFMMVM1-UT (W/PRESS) 3/4-0.5 to 13 Gpm---Thermostatic Mixing Valve-1/2"£299.08
CLFMMV-M1-QC-13 gpm-1/2"Quick ConnectThermostatic Mixing Valve-1/2"£230.24
DLFMMV-M1-UT-13 gpm-3/4"UnionThermostatic Mixing Valve-3/4"£243.52
A3/4 LFMMVM1-UT-PRESS-----Mixing Valve--£387.28
ELFMMV-M1-US-13 gpm-1"UnionThermostatic Mixing Valve-1"£323.02
A1/2 LFMMVM1-UT-PRESS-----Mixing Valve--£365.45
FLFMMV-M1-UT-13 gpm-1/2"UnionThermostatic Mixing Valve-1/2"£231.09
DLFMMV-M1-UT-13 gpm-1"UnionThermostatic Mixing Valve-1"£343.12
GLFMMV-M1-QC-13 gpm-1"Quick ConnectThermostatic Mixing Valve-1"£300.29
CLFMMV-M1-QC-13 gpm-3/4"Quick ConnectThermostatic Mixing Valve-3/4"£209.06
HLFMMVM1-QC 113 Gpm13 gpm---Thermostatic Mixing Valve-1"£707.96
HLFMMVM1-QC 3/413 Gpm13 gpm---Thermostatic Mixing Valve-3/4"£548.48
ILFMMVM1-UT 3/413 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-3/4"£276.19
JLFMMVM1-US 1/213 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-1/2"£251.03
ILFMMVM1-UT 1/213 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-1/2"£251.03
KLFMMVM1-PEX-Z4 1/213 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-1/2"£397.88
LLFMMVM1-CPVC 3/413 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-3/4"£511.43
HLFMMVM1-QC 1/213 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-1/2"£446.21
LLFMMVM1-CPVC 1/213 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-1/2"£409.95
JLFMMVM1-US 3/413 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-3/4"£276.19
MLFMMV-HTK 3/413 Gpm at 45 Psi0.5 to 13 Gpm---Thermostatic Mixing Valve-3/4"£263.50
LLFMMVM1-CPVC 120 Gpm at 125 Psi0.5 to 20 gpm---Thermostatic Mixing Valve-1"£672.52
NLFMMVM1-UT (W/PRESS) 1/220 Gpm at 125 Psi0.5 to 13 GpmPress1/2"-Thermostatic Mixing ValvePress1/2"£268.14
OLFMMVM1-PEX 3/420 Gpm at 125 Psi0.5 to 20 gpm---Thermostatic Mixing Valve-3/4"£511.43
WATTS -

LFN170 Series Mixing Valves

StyleModelCapacityFlow RateInlet SizeOutlet Temperature AccuracyPrice (inc. VAT)
ALFN170M3 3/4----£1,812.20
BLFN170M3 168 gpm At 45 psi4 to 68 gpm1"+/- 5° F£2,042.54
BLFN170M3 1 1/495 gpm At 45 psi4 to 95 gpm1 1/4"+/- 7° F£3,152.40
BLFN170M3 1 1/2105 gpm At 45 psi5 to 105 gpm1 1/2"+/- 7° F£3,448.81
BLFN170M3 2125 gpm At 45 psi7 to 125 gpm2"+/- 7° F£5,170.77
WATTS -

Thermostatic Mixing Valve, 1/2 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM495-3 1/2BZ8YAN£373.92
See Details
WATTS -

Thermostatic Mixing Valve, 3/4 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM496-2 3/4BZ8YAQ£473.34
See Details
WATTS -

Thermostatic Mixing Valve, 3/4 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM496-1 (W/press) 3/4CA7UGP£409.79
See Details
WATTS -

Thermostatic Mixing Valve, 1 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM497-4 1BZ8YBB£557.92
See Details
WATTS -

Thermostatic Mixing Valve, 1 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM497-3 1BZ8YAZ£557.92
See Details
WATTS -

Thermostatic Mixing Valve, 1 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM497-2 1BZ8YAY£557.92
See Details
WATTS -

Thermostatic Mixing Valve, 3/4 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM496-5 3/4BZ8YAX£566.84
See Details
WATTS -

Thermostatic Mixing Valve, 1 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM497-1 1BZ8YAW£385.51
See Details
WATTS -

Thermostatic Mixing Valve, 1/2 in Nomina, 125 PSI

ModelItemPrice (inc. VAT)
LFLM495-5 1/2BZ8YAT£440.69
See Details
WATTS -

Thermostatic Mixing Valve, 3/4 Inch Nominal Size, 125 PSI

ModelItemPrice (inc. VAT)
LFLM496-4 3/4BZ8YAR£473.34
See Details
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Features

  • Watts mixing valves have integral check valves and filter gaskets in both the hot and cold water inlets to prevent cross flow and ensure that water flows in one direction only.
  • The double throttling design responds quickly to changes in water temperature.
  • The solid wax hydraulic principle thermostat regulates both hot and cold water and is designed to provide consistent mixing of hot and cold fluids.
  • Heat traps are used in thermostatic valves to reduce convection loss (also known as thermosiphon) and thus, increase system efficiency.
  • In the event that the cold water supply is compromised, the flow of mixed water is safely restricted.
  • Sweat or threaded connections are available.

Working Mechanism

  • When tempered water is used, a thermostat in the valve's mixing chamber detects the outlet temperature and automatically positions a seat assembly, which controls the flow of hot and cold water supplied to the mixing chamber.
  • If the temperature of the mixed outlet rises, the thermostat will expand, moving the seat assembly to allow the cold water inlet port to open more fully while restricting the hot water inlet port.
  • If the mixed outlet temperature drops, the thermostat contracts, moving the seat assembly to allow the hot water inlet port to open more fully while restricting the cold water inlet port.
  • In both cases, the temperature of the mixed outlet water is automatically and continuously maintained at the preset temperature within the valve's tolerances.
  • When the cold or hot water supply fails, the seat assembly moves to an extreme position, cutting off the hot or cold inlet water port.
  • A mechanical adjustment allows you to select the desired outlet water temperature within the valve's range.

Standards and Approvals

  • ASSE 1016
  • ASSE 1017
  • ASSE 1069
  • ASSE 1070

Frequently Asked Questions

How do you adjust a thermostatic mixing valve?

  • Remove the plastic cap on top of the valve and adjust with a close-fitting spanner to adjust the temperature supply.
  • To raise the temperature, turn the knob anti-clockwise.
  • To reduce the temperature, turn the knob clockwise.

Do I need a thermostatic mixing valve?

To control water temperature at the delivery point and prevent scalding, you must install thermostatic mixing valves on your water heater. This will enable you to raise the heater temperature, killing possible bacteria.

How do you adjust the wattage on a water mixing valve?

  • Loosen the locking cap screw with a hex wrench to adjust the valve setting.
  • To adjust the temperature, lift the cap by 1/4 inches.
  • Turn counterclockwise to raise the temperature.
  • To reduce the temperature, turn the knob clockwise.

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