Product Review

Watts USG-B-M2 3/8" Under Sink Guardian Thermostatic Mixing Valve (0204141)Series USG-B Under Sink Guardian 3â"8" (10mm) compression fitting thermostatic mixing valves maintain and limit hot water to desired selectable temperature between 80 degrees Fahrenheit and 120 degrees Fahrenheit (27 degrees Celsius and 49 degrees Celsius) with flow rates as low as 0.5 gpm (1.9 lpm) and as high as 2.5 gpm (9.5 lpm). The mixing valve is listed to ASSE Standards 1070 for single fixture applications. The USG-B series uses a double throttling design to control both the hot and cold water supply to the mixed outlet. The superior flow characteristics of this valve provide accurate temperature control (±3 degrees Fahrenheit) with low pressure drop. As an added feature, the USG-B-M1 incorporates dual check valves to protect against cross-flow and integral screens to filter out debris.The unit is intended for under sink installation to control the hot water temperature and prevent accidental scalding. The water temperature must be adjusted by the installer using a thermometer to measure the hot water temperature at the faucet outlet. Maximum temperature of 110 degrees Fahrenheit (43 degrees Celsius) is recommended.Watts USG-B-M2 3/8" Under Sink Guardian Thermostatic Mixing Valve (0204141) Features:• Maintains mixed water temperature to 3 degrees Fahrenheit up to120 degrees Fahrenheit (49 degrees Celsius).• Installs easily between the stop valves and faucet• Includes tamper resistant locking cap 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.