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Worcester Bosch Gas Nozzle 18-15 8716117252

Worcester Bosch

Worcester Bosch Gas Nozzle 18-15 8716117252

Worcester Bosch 18-15 natural gas burner nozzle, part 8716117252, for Greenstar 15i and 18i ErP System NG boilers.

At a glance

  • Part type: Gas burner nozzle
  • Also known as 1031277
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
8716117252
GC number
J25-315
Showing prices

£9.84

£8.20 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Worcester Bosch 18-15 gas nozzle is a burner component used on natural gas versions of the Greenstar i ErP System range. It sits in the burner assembly and controls the delivery of gas into the combustion area, so its bore size and condition directly affect flame shape and combustion quality. The 18-15 designation identifies the nozzle size used across the 15i and 18i output models.

Signs this part needs replacing

  • Unstable or lazy flame at the burner, with the flame lifting or burning yellow rather than a steady blue
  • Soot deposits around the burner or heat exchanger, indicating incomplete combustion
  • Rising CO readings or a combustion analyser result outside the expected range for the appliance
  • Repeated ignition faults, flame supervision lockouts or combustion-related fault codes
  • Visible damage, blockage or wear at the nozzle orifice after a service inspection

Before you order

  • Check the appliance GC number against the compatibility list, as the nozzle is matched to the 15i and 18i ErP System NG models
  • Confirm the model and serial details on the boiler data badge before ordering, since output variants use different nozzle sizes
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.