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ThermoMix High-Flow Boiler Protection Thermostatic Mixing Valve, Cartridge Sensor

The ThermoMix boiler protection high-flow thermostatic mixing valve is used in hydronic heating systems with non-condensing boilers, including solid fuel, biomass, gas, LP or oil-fired. It can be installed with steel, cast iron and copper tube style boilers, automatically controlling the return water temperature, preventingcondensation of the water vapor contained in the flue gas.

The 280 series ThermoMix valve mixes bypass flow from the boiler with return flow from the system, sending a fixed temperature flow to the boiler which protects against corrosion from condensation occurring when a minimum flue gas temperature is not otherwise maintained.

Changable thermostatic sensor cartridges modifies valve temperature setting. The thermostatic sensor cartridge can easily be removed for maintenance or to change the valve set temperature, with out removing the valve body from the piping.

Note: Image depicts threaded model

Note: Do not use this item for any installation or repair of potable water applications. This product does not comply with the "Safe Drinking Water Act," which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking). This item is for non-potable (non-human consumption) water applications only.
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Connection Type:

C x C

Connection Method:


Max Temp (F):


Max Pressure (PSI):


Flow Capacity (Cv):




Body Pattern:



Point of Source

Standards Met:

ASSE 1017


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