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Altecnic Reflex Heating Expansion Vessel 400 Litre HV400W

Altecnic

Altecnic Reflex Heating Expansion Vessel 400 Litre HV400W

Reflex 400 litre heating expansion vessel manufactured by Altecnic, used in sealed heating systems to absorb the expansion of heated water.

Manufacturer part no.
HV400W
Showing prices

£2,972.42

£2,477.02 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Reflex 400 litre Heating Expansion Vessel is a heating system expansion vessel manufactured by Altecnic. It accepts the increase in water volume as a sealed system heats, limiting the resulting rise in system pressure. The vessel sits within the Altecnic expansion vessel range and carries the catalogue reference HV400W.

Signs this part needs replacing

  • System pressure climbs sharply as the boiler heats and drops again once cold
  • Water discharging from the pressure relief valve during heating cycles
  • Frequent top-ups needed to keep the system at its design pressure
  • Boiler locking out on low pressure
  • Dampness, weeping or corrosion around the vessel connection or body

Before you order

  • Confirm the required vessel capacity against the system volume and the vessel being replaced
  • Check the system connection size and orientation on the existing installation
  • Verify the available space and the mounting arrangement for a 400 litre vessel
  • Confirm the system design pressure and the pre-charge setting required for the installation

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.