Heating Components & Equipment Ltd have all the VAILLANT boiler parts you may require for your heating appliance, our boiler spares profile for VAILLANT spares are as follows Automatic air vent, Burners, Casings, Control knobs, Diaphragms, Electrodes, Expansion vessels, Fans, Flow switches, Gas valves, Gauges, Heat exchangers, Injectors, Microswitches, Printed circuit boards, Pressure switches, Pressure gauges, Pumps, Temperature gauges, Thermistor sensors, Thermocouples, Thermostats, Transformers, Wiring harnesses etc, when purchasing VAILLANT heating spares from Heating Components & Equipment Ltd you can guarantee you will receive a genuine manufacturered VAILLANT boiler spare parts.