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Grant Expansion Vessel MPSS08

Grant

Grant Expansion Vessel MPSS08

10 litre expansion vessel for Grant Vortex Pro 21E combi condensing oil boilers.

At a glance

  • Also known as 2160402
Manufacturer part no.
MPSS08
Showing prices

£137.60

£114.67 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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 Grant MPSS08 is a 10 litre expansion vessel used in Grant Vortex Pro combi condensing oil boilers. It absorbs the expansion of water as the system heats up, keeping pressure stable within the sealed heating circuit. It is a flat-profile vessel intended for the 21E combi models.

Signs this part needs replacing

  • System pressure rises sharply when the boiler is running and falls again once it cools
  • Water discharges from the pressure relief valve during heat-up
  • The boiler loses pressure repeatedly and needs frequent topping up
  • The vessel feels heavy or sounds full of water when tapped
  • Corrosion, staining or damp patches around the vessel connection

Before you order

  • Confirm your boiler model is a Grant Vortex Pro 21E combi, internal or external
  • Check the existing vessel's capacity and physical shape match the 10 litre flat type
  • Verify the system pressure and that the vessel charge has been checked before condemning the part
  • Check the connection size and orientation on the existing vessel against the boiler pipework

Not sure which part?

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