Worcester Bosch
Worcester Bosch Isolating Valve CH Flow 8737603033
Isolating valve for the central heating flow circuit on Worcester Bosch Greenstar 2000 Combi appliances.
At a glance
- Also known as 1038301
£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 ISOLATING VALVE CH FLOW is a Worcester Bosch isolation valve for the central heating flow circuit on Greenstar 2000 Combi appliances. It allows the heating circuit to be shut down at the appliance for service and component replacement without draining the full system. The part carries the manufacturer number 8737603033.
Signs this part needs replacing
- Weeping or dripping from the valve body or spindle
- The valve will not shut off fully, leaving the heating circuit live during service
- A seized or stiff handle that cannot be turned by hand
- Water tracking past the gland when the valve is operated
- Visible corrosion or scale build-up around the valve
Before you order
- Confirm the appliance model and GC number against the fit list
- Check whether the failed valve is on the CH flow or the CH return, as the two are separate parts
- Verify the existing valve connections and orientation before removal
- Isolate and drain or depressurise the appliance before starting work
Compliance
| Alternative numbers | 1038301 |
|---|
| 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 GR2300iW 25 C LPG COMBI | 47-800-27 | 47-800-27 | — | — |
| WORCESTER GREENSTAR GR2300iW 25 C NG COMBI | 47-800-26 | 47-800-26 | — | — |
Showing 10 of 16 compatible appliances.
Documents & drawings
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