Worcester Bosch
Worcester Bosch Plug (3-Way Valve) 8737604405
Plug for the 3-way valve assembly on Worcester Bosch Greenstar 1000 and 2000 series boilers.
At a glance
- Appliance family: Greenstar 1000 and Greenstar 2000 series
- Also known as 1038443
£12.85
£10.71 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 plug for the 3-way valve assembly, manufactured by Worcester Bosch. It is used across the Greenstar 1000 and Greenstar 2000 series of boilers. The plug forms part of the 3-way valve, which diverts water between the heating circuit and the hot water circuit.
Signs this part needs replacing
- Water weeping or dripping from the 3-way valve body
- Visible corrosion, scale or damage on the plug
- Dampness or staining around the valve area
- Loss of system pressure with no other obvious cause
Before you order
- Confirm your boiler model against the fit list above
- Check that part number 8737604405 matches the component being removed
- Isolate the appliance and drain down before fitting
Compliance
| Alternative numbers | 1038443 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 1000 SERIES GR1000W 24 C NG | 47-800-38 | 47-800-38 | — | — |
| WORCESTER GREENSTAR 1000 SERIES GR1000W 30 C NG | 47-800-39 | 47-800-39 | — | — |
| 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 GR1000W 24 C NG | — | — | — | |
| WORCESTER GREENSTAR GR1000W 30 C NG | — | — | — | |
| WORCESTER GREENSTAR GR2301iW 25 C LPG COMBI | — | — | — | |
| WORCESTER GREENSTAR GR2301iW 25 C NG COMBI | — | — | — |
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Documents & drawings
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