The Glowworm Water Pressure Sensor 0020069021 is a genuine Glowworm spare part with a Glowworm manufacturer's guarantee. The flow sensor is an essential component to both Domestic Hot Water and Heating systems as it acts as a safety device that ensures the appliances burner cannot ignite when the system is either low or empty of water. This component triggers when the pump activates to feed the instruction back to the PCB to allow for the ignition sequence to commence.

• Suitable for Glowworm Betacom and Easicom boilers from 2015 onwards