SPECIAL OFFERS
Special Offers Kit A 2 Litre Expansion Vessel & Non-Return Valve
Kit A combining a 2 litre expansion vessel and non-return valve for Ariston water heaters.
£47.52
£39.60 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
Kit A is a service kit comprising a 2 litre expansion vessel and a non-return valve, supplied for use with Ariston water heaters. The vessel absorbs expansion within the hot water system, while the non-return valve prevents backflow through the connection. Both components are supplied together as a single kit.
Signs this part needs replacing
- Water discharging from the vessel or its connection, indicating a failed internal diaphragm
- Loss of system pressure or repeated pressure fluctuations during heating cycles
- Water flowing back through the non-return valve, causing unwanted circulation or metering errors
- Visible corrosion, scale build-up or weeping at the vessel connection
Before you order
- Confirm the appliance is an Ariston water heater covered by this kit
- Check the existing vessel capacity and mounting arrangement before removal
- Check the connection size and thread on the existing non-return valve against the replacement
- Isolate the water supply and depressurise the system before starting work
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SPECIAL OFFERS Ariston Water Heaters | — | — | — |
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 documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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