Worcester Bosch
Worcester Bosch Pressure Relief Valve 8737713733
Pressure relief valve, part 8737713733, for Worcester Bosch Greenstar 1000 and 2000 series boilers.
At a glance
- Appliance family: Greenstar 1000 Series and Greenstar 2000 Combi
- Also known as 1038409
£5.42
£4.52 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 pressure relief valve, part number 8737713733, is a safety component used on Greenstar 1000 Series and Greenstar 2000 Combi appliances. It opens to discharge excess pressure from the boiler water circuit, protecting the appliance and system from over-pressurisation. It is supplied as a standalone component for replacement on the listed models.
Signs this part needs replacing
- Water weeping or discharging continuously from the pressure relief discharge pipe when the system is at normal pressure
- System pressure dropping repeatedly and requiring frequent top-ups
- Boiler pressure gauge reading climbing above the normal operating range
- Visible leakage or scale staining around the valve body or its seating
- Boiler locking out or refusing to fire where over-pressurisation has tripped the safety device
Before you order
- Confirm the appliance model and GC number against the fit list above
- Check the part number on the existing valve or in the appliance literature matches 8737713733
- Compare the removed valve with the new item for connection type and orientation before fitting
- Confirm whether the appliance is the NG or LPG variant, as both are covered by this valve
Compliance
| Alternative numbers | 1038409 |
|---|
| 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 | — | — | — |
Showing 10 of 12 compatible appliances.
Documents & drawings
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