Caleffi 521509A 3-Way Thermostatic Mixing Valve 3/4" Sweat

The Caleffi 521509A Thermostatic Valve that mixes water in three ways to keep domestic hot water and heating systems at the right temperature. This valve works by blending water from two sources and keeps the temperature stable through different inlet conditions. Water temperature can adjust between 85°F and 150°F using the locking set point knob on its 3/4" sweat connection. The valve helps keep water comfortable, safe from burns, and uses less energy. It works better with HVAC systems that need exact temperature control and keeps plumbing parts from scaling up and breaking down too soon.