VVKB Engine Heater with Thermostat 110 Volt 1000 Watt High quality VVKB 110 volt 1000 watt aluminum pumps circulating tank heater with thermostat and removable plug Released at the Automechanika Frankfurt 2014. 2015 officially go sale. Removable plug (waterproof IP67) Strong built pumps, aluminum housing, ceramic thermostat (silver alloy contacts) and heating pipes made of copper. The device works like a water heater, the cooling water is circulated and heated at the same time, the built-in thermostatic control regulates the device automatically. Suitable for cooling water hoses 0.63 in - 0.87 in internal diameter, Just between the coolant supply and return line of the indoor heat exchanger integrated Fertig. Items in the package include: One set VVKB heater, 2 X pipe clamps, 1 X Mounting Bracket, instruction manual.