We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brass thermostatic mixing valve with FNPT connections and locking mechanism

Watts

Watts 1170-UT-M2 3/4" Thermostatic Mixing Valve Brass

SKU CH-YHNB-B4GPQ

A thermostatic mixing valve with brass body, 0.5 to 23 gpm flow, 90 to 160°F temperature range, 150 psi maximum pressure, check valves, integral filter washers, and locking mechanism

  • TypeOther
  • Thermostatic control keeps water at a safe 90 to 160 °F
  • Brass body resists corrosion for long service life
  • Flow range from .5 to 23 gpm suits many fixtures
  • Rated for 150 psi maximum working pressure
  • Integral check valves and filter washers prevent cross-flow and debris

Product Identity

The Watts 1170-UT-M2 is a 3/4 inch thermostatic mixing valve constructed from brass. It regulates blended water temperature between 90 and 160 degrees Fahrenheit for residential or light commercial plumbing systems.

Ideal Use Cases

This valve suits installers needing a compact unit with integral filter washers, check valves and a locking mechanism for point-of-use temperature control. Builders requiring higher flow capacity or electronic mixing functions should look at alternative designs.

Installation Notes

The valve connects via 3/4 inch FNPT inlets and outlets and measures 5 7/16 inches high by 4 7/8 inches wide. Ensure hot supply stays within 120 to 200 degrees Fahrenheit and cold supply within 40 to 85 degrees Fahrenheit to avoid erratic thermostat response.

Highlights

  • Thermostatic control keeps water at a safe 90 to 160 °F
  • Brass body resists corrosion for long service life
  • Flow range from .5 to 23 gpm suits many fixtures
  • Rated for 150 psi maximum working pressure
  • Integral check valves and filter washers prevent cross-flow and debris

Specifications

BrandWATTS
TypeOther

Questions about this item

What pipe fittings are needed to connect the 3/4" FNPT inlets and outlets to my plumbing?

You will need 3/4" male NPT adapters or nipples to thread into the valve's female NPT ports, plus pipe sealant or tape rated for potable water.

Will the valve still regulate temperature if my hot water supply drops below 120°F or my cold supply rises above 85°F?

The thermostat is calibrated for hot inlet temperatures of 120°F to 200°F and cold inlet temperatures of 40°F to 85°F; outside those ranges the valve may not maintain the set point.

How can I verify the valve is delivering water within the 90°F to 160°F range after installation?

Run water through the outlet and measure the temperature with a calibrated thermometer; it should read between 90°F and 160°F when the handle is set accordingly.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.