Worcester Bosch
Worcester Bosch Venturi 87186506050
Worcester Bosch venturi, 3.7 mm, Y configuration, for G20 natural gas and G31 LPG appliances.
At a glance
- Also known as 1038281
£36.97
£30.81 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
This is a Worcester Bosch venturi with a 3.7 mm bore, supplied in a Y configuration for G20 natural gas and G31 LPG applications. It forms part of the gas and air mixing circuit on Worcester Greenstar combi and system boilers, where it meters and accelerates the gas flow into the burner. The part carries the manufacturer reference 87186506050.
Signs this part needs replacing
- Unstable or erratic flame at the burner
- Combustion readings drifting outside the expected range for the appliance
- Whistling or unusual noise from the gas and air mixing area
- Rough ignition or repeated lockouts after other causes have been ruled out
- Visible blockage, debris or damage at the venturi throat
Before you order
- Confirm the existing venturi bore marking matches 3.7 mm
- Check the appliance is set for the correct gas type, G20 or G31
- Verify the boiler model against the fit list above
- Cross-check the part number 87186506050 on the existing component or in the appliance documentation
Compliance
| Alternative numbers | 1038281 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 25 C LPG | 47-800-27 | 47-800-27 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 25 C NG | 47-800-26 | 47-800-26 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 30 C LPG | 47-800-29 | 47-800-29 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 30 C NG | 47-800-28 | 47-800-28 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C LPG | 47-800-35 | 47-800-35 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C NG | 47-800-34 | 47-800-34 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C LPG | 47-800-37 | 47-800-37 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C NG | 47-800-36 | 47-800-36 | — | — |
| WORCESTER GREENSTAR 4000 COMBI GR4700iW 25 C LPG | 47-800-31 | 47-800-31 | — | — |
| WORCESTER GREENSTAR 4000 COMBI GR4700iW 25 C NG | 47-800-30 | 47-800-30 | — | — |
Showing 10 of 36 compatible appliances.
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.
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