The Thorn pump overrun thermostat is located after the primary heat exchanger within the heating appliance and allows the heated water to be circulated within the closed heating system. In the design of most combi boilers, the pump can be found before the diverter valve.
Fits multiple appliances
Technical specification
Waist Sizeab17ce38gxTypeThermostatSupplier Part Number402S088Brand NameThorn