Worcester Bosch Burner Nozzle 30-21 LPG 8716117254

The Worcester Bosch 8716117254 is a 30-21 LPG burner nozzle supplied for the Greenstar i ErP range running on liquefied petroleum gas. It sits in the gas train at the burner and meters the flow of LPG into the combustion head, so the air and gas mix correctly across the firing range. Nozzle sizing is specific to the fuel and the appliance output, which is why the LPG variant carries its own part number rather than sharing the natural gas item.

• The boiler lights but the flame is weak, lazy or visibly yellow rather than a crisp blue.
• Repeated lockouts or failed ignition attempts on an LPG appliance.
• Soot deposits around the burner head or heat exchanger.
• Flue gas readings drifting outside the expected CO2 or CO range for the appliance.
• Rough, uneven running or noise at the burner after a gas conversion or service.

• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
• Confirm the appliance GC number and model against the compatibility list, as nozzle sizing differs between outputs and fuels.
• Check the nozzle marking matches the 30-21 LPG specification before fitting.
• Have the burner gasket and sealing washers to hand if the burner is being opened for the swap.