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Water Safety & Flow Control



Under Sink Guardian Thermostatic Mixing Valves, Plastic



3/8 in. (10mm)


Series USG-P 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 protect against accidental scalding. It consists of a thermoplastic body construction with 3/8 in. male compression connections, stainless steel disc, spring, and ball, copper thermostat, Buna-N rubber disc and O-rings, Udel-P1700 pistons, Garlock 3000 gasket, check valves, tamper resistant locking cap and integral strainer with 40 mesh stainless steel screens to filter out debris. Series USG-P uses a double throttling design and a thermostat to control hot and cold water temperature, and dual check valves to protect against cross flow. It provides superior flow rate (between .5 and 2.5 gpm), accurate temperature control, and low pressure drop. It is suitable for kitchen and bath installations where the water delivered to the fixtures is intended for bathing or washing. Strainer (-strainer) model available. Maximum Pressure: 150psi (10.6 bar). Accurate within +/-3°F (+/-1.7°C). Temperature Range: 80°F to 120°F.

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Disclaimer: Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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Additional Information

Danger – Scalding Lurks!

Every year, thousands of people suffer serious thermal shock or scalding injuries in their bathtubs, sinks and showers.

Click here for informative resources to help you protect against these dangers.

Learn About

Thermostatic Mixing Valves

Every year thousands suffer injuries as a result of hot water scalding and thermal shock injuries. Thermostatic mixing valves protect against these dangers.

To learn more about thermostatic mixing valves and how they work, click here.