The Halstead detection electrode is responsible for creating the spark that starts the burner and is responsible for ensuring there is a flame present in the burner. This is an important safety device that makes sure the boiler isn't still supplying gas without a flame.
Fits a number of Halstead appliances
Technical specification
Waist Sizeab59ci94gxTypeElectrodeToilet Cistern CapacityFTW--ERP RatingNot ApplicableSupplier Part Number988366Brand NameHalstead