WATTS® Under Sink Guardian® 0204143 USG Thermostatic Mixing Valve, 3/8 in Nominal, Compression End Style, 150 psi Pressure, 0.25 gpm Flow, Brass Body, Domestic

WALFUSGBM2 MFG #: 0204152
  • Body Material: Brass
  • Country of Origin: US
  • Domestic/Import: Domestic
  • End Style: Compression
  • Flow Capacity: 0.25 gpm
  • Manufacturer Name: Watts Water Technologies
  • Media: Hot/Cold Water
  • Nominal Size: 3/8 in
  • Pressure Rating: 150 psi
  • Series: USG
  • Softgoods Material: Buna-N® Rubber Disc, O-Ring
Series LFUSG-B Under Sink Guardian Thermostatic Mixing Valves are used in commercial and residential applications to mix hot and cold water in under-the-sink installations to minimize the risk of accidental scalding. It consists of a Lead Free brass body construction with 3/8 in. male compression connections and quick-connect, check valves, tamper resistant locking nut and integral strainer with 40 mesh stainless steel screens to filter out debris. Series LFUSG-B uses a thermostat to control hot and cold water temperature, and dual check valves to protect against cross flow. It provides superior flow rate (between 0.25 and 2.25 gpm), accurate temperature control, and low pressure drop. It is suitable for under the counter installations where the water delivered to the fixtures is intended for washing. Satin-chrome finish (-SC) models available. ASSE 1070, CUPC listed.
  • Features and More


  • Lead free brass body construction
  • Installs easily between the stop valves and faucet
  • Includes tamper resistant locking nut to prevent accidental mis adjustment
  • Built-in check valves prevent migration of hot water to cold and cold water to hot water piping
  • Provided with cap for three port application
  • Integral strainer with 40 mesh stainless steel screens to filter out debris
  • 0.25 gpm (1 l/m) flow
  • 30 psi minimum supply pressure
  • 120 to 180 deg F hot inlet temperature
  • 39 to 80 deg F cold inlet temperature
  • 5 deg F minimum inlet temperature differential
  • 80 to 120 deg F temperature
  • 150 psi maximum pressure
  • The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight


  • Commercial and Residential


  • ASSE 1070
  • cUPC Listed
  • PROP65: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.


  • 1 year Limited