Ariston
Ariston Expansion Vessel 61016461
Expansion vessel, part number 61016461, for Ariston Genus B PLUS 30 and Chaffoteaux Duo 55 Litre boilers.
At a glance
- Appliance family: Ariston Genus B PLUS 30
£236.75
£197.29 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 expansion vessel is a sealed pressure vessel fitted to Ariston and Chaffoteaux gas boilers, supplied under part number 61016461. It absorbs the volumetric expansion of system water as it heats, limiting pressure rise within the sealed heating circuit. This part is listed for the Ariston Genus B PLUS 30 family and the Chaffoteaux Duo 55 Litre.
Signs this part needs replacing
- System pressure climbs sharply as the boiler heats and falls again once it cools.
- The pressure relief valve discharges water during normal heating cycles.
- The pressure gauge reads high with the boiler cold and rises further when running.
- Water or moisture is present at the vessel's air charge valve.
- The boiler locks out or drops to low pressure shortly after firing.
Before you order
- Check the appliance data plate to confirm the exact model and variant.
- Confirm the part number 61016461 matches the number on the existing component or the manufacturer's parts list.
- Compare the existing vessel against the replacement before fitting, as mounting and connection arrangements vary between variants.
- Work on a sealed heating system should be carried out by a competent heating engineer.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON ARISTON GENUS B PLUS 30 | — | — | — | |
| ARISTON ARISTON GENUS B PLUS 30 BFFI - EDITION ONE | — | — | — | |
| ARISTON ARISTON GENUS B PLUS 30 BFFI - EDITION TWO | — | — | — | |
| ARISTON GENUS B PLUS 30 BFFI LPG EDITION 2 (JAN 2005) | 47-116-28 | 47-116-28 | — | — |
| ARISTON GENUS B PLUS 30 BFFI NG EDITION 2 (JAN 2005) | 47-116-28 | 47-116-28 | — | — |
| CHAFFOTEAUX Duo 55 Litre | — | — | — |
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.