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Altecnic Reflex 300 Litre Heating Expansion Vessel HV300W

Altecnic

Altecnic Reflex 300 Litre Heating Expansion Vessel HV300W

Altecnic Reflex 300 litre heating expansion vessel for sealed heating systems, part number HV300W.

Manufacturer part no.
HV300W
Showing prices

£2,211.89

£1,843.24 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 300 litre Heating Expansion Vessel is manufactured by Altecnic and forms part of the Reflex range of expansion vessels. It is used on heating systems to absorb the increase in water volume as the system heats up, limiting the resulting rise in system pressure. It is a boiler-associated component suited to sealed heating installations.

Signs this part needs replacing

  • Water discharging from the pressure relief valve during heating cycles
  • System pressure rising sharply when hot or falling repeatedly when cold
  • Water or corrosion present at the vessel connection
  • Vessel feels heavy or waterlogged when tapped, indicating a lost air charge
  • Frequent topping up of system pressure to maintain operation

Before you order

  • Confirm the vessel volume required for the system, based on water content and operating temperature range
  • Check the connection size and thread on the existing vessel against the new unit
  • Verify the system operating pressure sits within the vessel's pre-charge and maximum working pressure limits
  • Check there is sufficient space and suitable mounting for a vessel of this capacity

Not sure which part?

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