Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Ariston DHW Expansion Vessel 569293

Ariston

Ariston DHW Expansion Vessel 569293

DHW expansion vessel, part 569293, for Ariston Challenger, DIA, STYX and SX gas boilers.

At a glance

  • Also known as 1572316
Manufacturer part no.
569293
GC number
164-365
Showing prices

£61.84

£51.53 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 Ariston 569293 is a domestic hot water (DHW) expansion vessel used in Ariston gas boilers. It absorbs the expansion of heated domestic water within the hot water circuit, limiting pressure rise and protecting components such as the pressure relief valve and heat exchanger. It is listed under expansion vessels within gas boiler spares.

Signs this part needs replacing

  • Water discharging from the pressure relief valve during hot water draw-off
  • Hot water pressure rising sharply when the boiler heats the domestic water
  • The vessel feels heavy or sounds full of water when tapped
  • Pressure gauge readings that climb and stay high after hot water use
  • Frequent topping up of system pressure to keep the boiler running

Before you order

  • Confirm your boiler model against the fitment list above
  • For STYX SX 20 M and SX 20 MFF, check the appliance serial number is 92010000 or later
  • Check the GC number on the appliance data badge where one is listed
  • Compare the connection size and vessel capacity with the part being removed

Not sure which part?

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