Worcester Bosch
Worcester Bosch Expansion Vessel 4,5L Plastic 87485100720
Worcester Bosch 4.5 litre plastic expansion vessel, part 87485100720, for Greenstore combi and system models.
At a glance
- Also known as EXPANSION-VESSEL-45L-PLASTIC, 1022791
£164.33
£136.94 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 87485100720 is a 4.5 litre plastic expansion vessel used in Greenstore combi and system appliances. It absorbs the volume increase of water as the sealed heating circuit heats up, holding system pressure within a stable range. The vessel is supplied as a serviceable component for the Greenstore range.
Signs this part needs replacing
- System pressure rises sharply when the appliance heats up and falls again once it cools
- Water discharges from the pressure relief valve during normal running
- Pressure needs topping up regularly, suggesting the vessel has lost its air charge
- Visible corrosion, distortion or water weeping at the vessel connection
- The appliance locks out or cuts out on low system pressure
Before you order
- Confirm the appliance model against the fit list before ordering
- Check the existing vessel's capacity marking matches 4.5 litres
- Inspect the mounting position and connections on the appliance to confirm the vessel will seat correctly
- Verify the part number 87485100720 against the number on the existing component
Compliance
| Barcode / EAN | 4010009094661 |
|---|---|
| Alternative numbers | EXPANSION-VESSEL-45L-PLASTIC, 1022791 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTORE 11 COMBI SOFT START | — | — | — | |
| WORCESTER GREENSTORE 11 SYSTEM SOFT START | — | — | — | |
| WORCESTER GREENSTORE 6 COMBI SOFT START | — | — | — | |
| WORCESTER GREENSTORE 6 SYSTEM | — | — | — | |
| WORCESTER GREENSTORE 6 SYSTEM SOFT START | — | — | — | |
| WORCESTER GREENSTORE 7 COMBI SOFT START | — | — | — | |
| WORCESTER GREENSTORE 7 SYSTEM | — | — | — | |
| WORCESTER GREENSTORE 7 SYSTEM SOFT START | — | — | — | |
| WORCESTER GREENSTORE 9 COMBI SOFT START | — | — | — | |
| WORCESTER GREENSTORE 9 SYSTEM | — | — | — |
Showing 10 of 11 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.
WORCESTER appliance manual — GREENSTORE 11 COMBI SOFT START, GREENSTORE 6 COMBI SOFT START, GREENSTORE 7 COMBI SOFT START, GREENSTORE 9 COMBI SOFT START
manualmanualWORCESTER appliance manual — GREENSTORE 11 SYSTEM SOFT START, GREENSTORE 6 SYSTEM, GREENSTORE 6 SYSTEM SOFT START, GREENSTORE 7 SYSTEM, GREENSTORE 7 SYSTEM SOFT START, GREENSTORE 9 SYSTEM, GREENSTORE 9 SYSTEM SOFT START
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