Alpha
Alpha Expansion Vessel 6.0001098
5 litre, 2.5 bar expansion vessel for the Alpha Combi MAX 600 boiler.
At a glance
- Also known as 1250790
Showing prices
£102.14
£85.12 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Alpha 6.0001098 is a 5 litre expansion vessel rated at 2.5 bar, used in the Alpha Combi MAX 600 boiler. It absorbs the expansion of water as the heating system heats up, helping to keep system pressure stable during operation.
Signs this part needs replacing
- Boiler pressure rises sharply when the heating is running and drops again once it cools.
- System pressure needs topping up frequently.
- Water is discharged from the pressure relief valve.
- The boiler locks out or displays a low pressure fault.
- Knocking or banging noises from the boiler as it heats up.
Before you order
- Confirm the boiler model is the Alpha Combi MAX 600.
- Check the existing vessel's pressure rating and part number against 6.0001098.
- Check access and space around the vessel's mounting point before ordering.
Compliance
| Alternative numbers | 1250790 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA COMBI MAX 600 | — | — | — | |
| ALPHA COMBI MAX 600 | — | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.
No technical questions yet for this part.
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