Altecnic
Altecnic Reflex 18 Litre Heating Expansion Vessel HV18C
Reflex 18 litre heating expansion vessel from Altecnic, used to absorb expansion in sealed heating systems.
£92.30
£76.92 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 Reflex 18 litre Heating Expansion Vessel is an Altecnic expansion vessel from the Reflex range, intended for use in sealed heating systems. It accommodates the volume increase of system water as it heats, limiting pressure rise across the circuit.
Signs this part needs replacing
- System pressure rises sharply once the boiler fires and falls again when it cools.
- Water discharges from the pressure relief valve during normal heating cycles.
- The pressure gauge needs frequent topping up to hold its set point.
- The vessel feels heavy or waterlogged, or water is present at the air charge valve.
- Pressure fluctuates noticeably when hot taps or other outlets are used.
Before you order
- Confirm the vessel capacity required for the system volume and the existing vessel's rating.
- Check the connection size and thread on the existing vessel and its mounting arrangement.
- Check the pre-charge pressure required for the system and whether it can be set on site.
- Verify the available space and orientation where the vessel is to be fitted.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALTECNIC Expansion Vessels | — | — | — |
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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