The pilot burner is a flame within the unit that is needed to ignite the gas that is coming in to the main burner. When the appliance is switched on the gas valve releases gas in to the burner which is then ignited by the pilot flame.
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Technical Specifications
TypePilotToilet Cistern CapacityFTW--Supplier Part Number331101777Brand NameHamworthy
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Hamworthy 331101777 NAT GAS PILOT JET G45.1SINGLE HOLE 0.45