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Alpha Domestic Hot Water Heat Exchanger 1.022220

Alpha

Alpha Domestic Hot Water Heat Exchanger 1.022220

Domestic hot water heat exchanger for Alpha CD25C, CD25X and HE25 boilers.

At a glance

  • Part type: domestic hot water heat exchanger
  • Also known as HEAT-EXCHANGER-14-PLATES, DHW-HEAT-EXCHANGER-CD25, 1257759
Manufacturer part no.
1.022220
Showing prices

£154.49

£128.74 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 Alpha 1.022220 is a domestic hot water (DHW) heat exchanger used in Alpha gas boilers. It transfers heat from the primary circuit to the domestic hot water supply, so it sits directly in the path of the hot water the boiler produces. It is listed for the Alpha CD25 and HE25 appliance families.

Signs this part needs replacing

  • Hot water runs cool or takes noticeably longer to reach temperature
  • Reduced hot water flow rate at the taps compared with the cold supply
  • Hot water temperature fluctuates during draw-off
  • Water weeping or staining around the heat exchanger body or its connections
  • Scale or debris build-up restricting the DHW circuit, common in hard water areas

Before you order

  • Confirm your boiler model against the fitment list above
  • Check the part number on the existing heat exchanger matches 1.022220
  • Inspect the plate stack and connections for scale, debris or damage before refitting
  • Verify the appliance is the LPG or NG variant as applicable to your installation

Not sure which part?

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