Worcester Bosch
Worcester Bosch Orifice 30KW G20 5.5MM 87186510180
Gas orifice for Worcester Bosch Greenstar 2000 Combi appliances on G20 natural gas, sized 5.5mm for 30kW models.
At a glance
- Also known as 1038291
£32.90
£27.42 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The ORIFICE 30KW G20 5.5MM is a gas orifice manufactured by Worcester Bosch, part number 87186510180. It is fitted in the gas train of Greenstar 2000 Combi appliances and meters the gas flow delivered to the burner. The 5.5mm sizing and 30kW rating apply to appliances running on G20 natural gas.
Signs this part needs replacing
- Burner flame is weak, yellow or unstable
- Flue gas analyser readings fall outside the expected combustion range
- The appliance fails to reach its rated heat input
- Soot deposits are visible around the burner or injector
- Gas rate measured at the meter is below specification
Before you order
- Confirm the appliance model and GC number appear in the fit list
- Confirm the appliance is running on G20 natural gas
- Check the size marking on the existing orifice matches 5.5mm
- Check the old component against part number 87186510180
Compliance
| Alternative numbers | 1038291 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 25 C NG | 47-800-26 | 47-800-26 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 30 C NG | 47-800-28 | 47-800-28 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C NG | 47-800-34 | 47-800-34 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C NG | 47-800-36 | 47-800-36 | — | — |
| WORCESTER GREENSTAR GR2300iW 25 C NG COMBI | 47-800-26 | 47-800-26 | — | — |
| WORCESTER GREENSTAR GR2300iW 30 C NG COMBI | 47-800-28 | 47-800-28 | — | — |
| WORCESTER GREENSTAR GR2301iW 25 C NG COMBI | — | — | — | |
| WORCESTER GREENSTAR GR2301iW 30 C NG COMBI | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
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