Worcester Bosch
Worcester Bosch Isolating Valve CH Return 8737603032
Isolating valve for the central heating return on Worcester Bosch Greenstar 2000 Combi Gr2300IW appliances.
At a glance
- Also known as 8905426
£59.06
£49.22 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 Worcester Bosch 8737603032 is an isolating valve for the central heating return on Greenstar 2000 Combi Gr2300IW appliances. It allows the return leg of the heating circuit to be shut off independently of the rest of the system. This lets an engineer isolate and drain that section for service or component replacement without disturbing the whole installation.
Signs this part needs replacing
- The valve spindle weeps or drips when operated or while the system is under pressure
- The valve will not shut off fully, so the heating circuit cannot be properly isolated
- The handle is seized, stiff or spins without moving the valve internals
- Corrosion, scale or staining around the valve body or compression joints
Before you order
- Confirm the part number on the existing valve or the appliance literature matches 8737603032
- Check the appliance model and variant against the fit list above, including NG or LPG
- Confirm whether the return isolating valve is the one at fault rather than the flow side
- Allow for isolating and draining the heating circuit before fitting
Compliance
| Alternative numbers | 8905426 |
|---|
| 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 GR2300iW 25 C LPG COMBI | 47-800-27 | 47-800-27 | — | — |
| WORCESTER GREENSTAR GR2300iW 25 C NG COMBI | 47-800-26 | 47-800-26 | — | — |
| WORCESTER GREENSTAR GR2300iW 30 C LPG COMBI | 47-800-29 | 47-800-29 | — | — |
| WORCESTER GREENSTAR GR2300iW 30 C NG COMBI | 47-800-28 | 47-800-28 | — | — |
Documents & drawings
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