Ariston
Ariston Standard Expansion Vessel 7 Litre 65101719
7 litre standardised expansion vessel for Ariston ACO and UNO gas boilers, part number 65101719.
At a glance
- Also known as EXPANSION-VESSEL-7-L-STD, 1578030
£110.23
£91.86 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 Ariston 65101719 is a 7 litre standardised expansion vessel used in Ariston gas boilers. It absorbs the volume increase of water as the heating circuit heats up, limiting pressure rise and protecting the system from excessive expansion. It is fitted across the Ariston ACO and UNO boiler families.
Signs this part needs replacing
- System pressure rises sharply once the boiler is running and heating up
- Boiler pressure drops repeatedly and needs frequent topping up
- Water or moisture present at the vessel valve, indicating a split internal diaphragm
- Discharge from the pressure relief valve during normal heating cycles
- Visible corrosion or external damage to the vessel body
Before you order
- Confirm your boiler model against the fit list above
- Check the existing vessel's capacity and connection arrangement match the 7 litre unit
- Verify system pressure and vessel charge before condemning the part
- Check for other causes of pressure loss, such as leaks or a faulty pressure relief valve
Compliance
| Barcode / EAN | 5414849094550 |
|---|---|
| Alternative numbers | EXPANSION-VESSEL-7-L-STD, 1578030 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON ACO 27 MFFI GPL | 47-116-34 | 47-116-34 | — | — |
| ARISTON ACO 27 MFFI MET | 47-116-34 | 47-116-34 | — | — |
| ARISTON ACO 27 RFFI SYSTEM GPL | 41-116-09 | 41-116-09 | — | — |
| ARISTON ACO 27 RFFI SYSTEM MET | 41-116-09 | 41-116-09 | — | — |
| ARISTON ACO 32 MFFI GPL | 47-116-35 | 47-116-35 | — | — |
| ARISTON ACO 32 MFFI MET | 47-116-35 | 47-116-35 | — | — |
| ARISTON ACO 32 RFFI SYSTEM GPL | 41-116-10 | 41-116-10 | — | — |
| ARISTON ACO 32 RFFI SYSTEM MET | 41-116-10 | 41-116-10 | — | — |
| ARISTON ARISTON ACO 27 MFFI | — | — | — | |
| ARISTON ARISTON ACO 27 RFFI SYSTEM | — | — | — |
Showing 10 of 14 compatible appliances.
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