Bradley Thermostatic Mixing ValvesANSI standards require tepid water to assure that eye wash and shower users are not subjected to freezing or scalding water temperatures. Thermostatic mixing valves blend hot and cold water to a comfortable flushing temperature between 60 and 95 degrees F. Model S19-2000 provides 8 gallons per minute and accommodates up to three eye washers or one eye/face wash. Model S19-2100 provides 25 gallons per minute and accommodates one drench shower or multiple eye washes.