Worcester Bosch
Worcester Bosch Elbow Heat Exchanger Flow Assembly 87186495540
Worcester Bosch elbow heat exchanger flow assembly, part number 87186495540, for Greenstar 2000 Combi and 4000 System boilers.
At a glance
- Also known as 1038277
£8.32
£6.93 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 elbow heat exchanger flow assembly is a Worcester Bosch pipework component that forms the flow connection at the heat exchanger. It is identified by part number 87186495540 and is used across the Greenstar 2000 Combi and Greenstar 4000 System appliance families. Its role is to route and seal the flow side of the heat exchanger circuit within the boiler.
Signs this part needs replacing
- Visible weeping or drips at the elbow connection to the heat exchanger
- Staining, scale or corrosion around the flow assembly joint
- Loss of system pressure that traces back to the flow connection
- Water tracking onto nearby components or the boiler base
Before you order
- Confirm the boiler model and GC number against the fit list
- Check the existing flow assembly for the same Worcester Bosch part number 87186495540
- Inspect the sealing faces and connections before fitting to confirm no further damage
- Isolate the appliance and drain down as required before removing the old assembly
Compliance
| Alternative numbers | 1038277 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| 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 SYSTEM GR4700iW 12 S LPG | 41-800-08 | 41-800-08 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 12 S NG | 41-800-07 | 41-800-07 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 15 S LPG | 41-800-10 | 41-800-10 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 15 S NG | 41-800-09 | 41-800-09 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 18 S LPG | 41-800-12 | 41-800-12 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 18 S NG | 41-800-11 | 41-800-11 | — | — |
Showing 10 of 28 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.
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