SPECIAL OFFERS
Spirotech SpiroExpand EVN 12L Vessel EVN12
Spirotech SpiroExpand EVN 12L expansion vessel, part number EVN12, for sealed heating systems.
£77.76
£64.80 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 SpiroExpand EVN 12L Vessel is an expansion vessel manufactured by Spirotech and identified by part number EVN12. It forms part of the SpiroExpand EVN range and is fitted to sealed heating systems to accommodate the change in system water volume as the system heats and cools. The vessel has a nominal capacity of 12 litres.
Signs this part needs replacing
- System pressure swings widely between the cold and hot states of the system
- The boiler pressure gauge reads low, or the boiler locks out on low pressure
- Water or air is escaping from the vessel connection
- The pressure relief valve discharges repeatedly during normal operation
- The system needs frequent topping up to maintain working pressure
Before you order
- Confirm the installed vessel is a 12 litre unit and that the SpiroExpand EVN range suits the installation
- Check the system water volume against the vessel capacity required for the system
- Check the connection size and orientation on the existing vessel match the replacement
- Confirm the system pressure is set correctly once the vessel is fitted
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SPECIAL OFFERS Spirotech | — | — | — |
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.
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.