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Brass thermostatic mixing valve with PEX connections, green accents, compact rectangular body

Watts

Watts 3/4 LF 1170 PEX mixing valve brass .5 to 23 gpm 90 to 160 F 150 psi

SKU CH-302T-5PJJG MPN 3/4

Thermostatic mixing valve with brass body, PEX connections, .5 to 23 gpm flow and 90 to 160 F temperature range

  • TypeDrain Components
  • ColorGreen
  • Thermostatic control delivers stable 90 to 160 F output
  • Brass body withstands 150 psi maximum pressure
  • Flow range covers .5 to 23 gpm demand
  • PEX inlets and outlets simplify installation
  • Integral filter washers and check valves protect system

Thermostatic Mixing Valve

The Watts LF 1170 PEX is a thermostatic mixing valve with a brass body designed to blend hot and cold water to a stable outlet temperature. It accepts PEX connections on both 3/4 inch inlet and outlet ports. The valve operates on a solid wax hydraulic principle thermostat and includes integral check valves and filter washers.

Installers needing PEX sweat-free connections

Plumbers and facility managers who require a lead-free compliant valve for potable water systems will find this unit suitable for point-of-use or point-of-distribution installation. The locking mechanism helps secure the set temperature against tampering. Installers who need copper sweat, threaded, or CPVC connections instead of PEX should look at alternative valve configurations.

Flow range .5 to 23 gpm

The valve delivers a flow capacity from .5 up to 23 gallons per minute, which determines whether it can serve the intended fixture or branch load. It supports a maximum working pressure of 150 psi and a mixed outlet temperature range of 90 to 160 degrees F. Hot supply temperatures between 120 and 200 degrees F and cold supply between 40 and 85 degrees F are required for proper operation.

Highlights

  • Thermostatic control delivers stable 90 to 160 F output
  • Brass body withstands 150 psi maximum pressure
  • Flow range covers .5 to 23 gpm demand
  • PEX inlets and outlets simplify installation
  • Integral filter washers and check valves protect system

Specifications

TypeDrain Components
ColorGreen
BrandWatts
Model3/4 LF 1170 PEX

Questions about this item

What flow-rate range should I expect from the 3/4 LF 1170 PEX mixing valve?

The valve delivers a flow rate of 0.5 to 23 gpm, so it handles both low-demand fixtures and higher-volume applications without needing a larger body.

How will the 90 to 160 °F temperature range behave once the valve is installed?

The thermostat maintains outlet water between 90 and 160 °F, automatically balancing hot and cold inlet fluctuations to keep the set temperature stable at the tap.

What does the 150 psi maximum pressure rating mean for my PEX plumbing system?

The valve is rated for 150 psi, so it safely accommodates typical residential supply pressures while the integral check valves and filter washers protect against backflow and debris.

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