Alpha
Alpha DHW Expansion Vessel 6.0001015
5 litre DHW expansion vessel rated at 3.5 bar for the Alpha 500 E boiler.
At a glance
- Also known as EXPANSION-VESSEL-5-LITRE-35B-XVES050020, 1250741
£187.36
£156.13 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 Alpha 6.0001015 is a 5 litre domestic hot water (DHW) expansion vessel rated at 3.5 bar. It is fitted to the Alpha 500 E boiler to absorb expansion within the DHW circuit. The vessel helps maintain stable pressure and protects the system from excessive pressure spikes.
Signs this part needs replacing
- Pressure relief valve discharging water during heating cycles
- Fluctuating hot water pressure
- Visible corrosion or water weeping from the vessel
- Reduced hot water performance or repeated system pressure loss
Before you order
- Confirm your appliance is an Alpha 500 E (GC: 47-532-07)
- Check the existing vessel is rated at 5 litre and 3.5 bar
- Verify the part number 6.0001015 matches your requirement
- Isolate the appliance safely before fitting
Compliance
| GC number | 173-046 |
|---|---|
| Alternative numbers | EXPANSION-VESSEL-5-LITRE-35B-XVES050020, 1250741 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA 500 E | 47-532-07 | 47-532-07 | — | — |
| ALPHA ALPHA 500 E | — | — | — |
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.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.