Ferroli
Ferroli Expansion Vessel 39821550
7 litre expansion vessel for Ferroli Optimax HE series gas boilers, part number 39821550.
At a glance
- Also known as 1210884
£167.83
£139.86 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 Ferroli 39821550 is a 7 litre expansion vessel for Optimax HE series gas boilers. It absorbs the thermal expansion of heating system water, limiting pressure rise as the boiler heats up. The vessel is a serviceable component within the appliance's sealed heating circuit.
Signs this part needs replacing
- Boiler pressure rises sharply when the heating is running and falls when cold.
- Frequent topping up of system pressure is required.
- Water discharges from the pressure relief valve during heating cycles.
- The vessel feels heavy or water is heard inside when shaken.
- Visible corrosion or water staining around the vessel connection.
Before you order
- Confirm the boiler model and GC number against the fitment list.
- Check the existing vessel is 7 litre capacity.
- Verify the connection size and mounting arrangement match the appliance.
- Check system pressure and rule out other causes of pressure loss.
Compliance
| Alternative numbers | 1210884 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| FERROLI FERROLI OPTIMAX HE 25S | — | — | — | |
| FERROLI FERROLI OPTIMAX HE 31C | — | — | — | |
| FERROLI OPTIMAX HE 25S - 30K0318000 (21/09/2006) | 41-267-25 | 41-267-25 | — | — |
| FERROLI OPTIMAX HE 31C - 30K0321000 (23/10/2006) | 47-267-42 | 47-267-42 | — | — |
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.
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