Alpha
Alpha Plate Heat Exchanger and 3-Way Valve Assembly 3.018684
Plate heat exchanger and 3-way valve assembly for the Alpha He25 (LPG) boiler, part number 3.018684.
At a glance
- Also known as 1260388
£424.96
£354.13 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Alpha Plate Heat Exchanger and 3-Way Valve Assembly is a combined component for the Alpha He25 (LPG) boiler. It transfers heat from the primary circuit to domestic hot water and controls the flow path between heating and hot water modes. It is supplied as a single assembly under part number 3.018684.
Signs this part needs replacing
- Domestic hot water runs hot and cold or loses temperature
- No hot water while central heating works, or the reverse
- The valve fails to switch between heating and hot water modes
- Water leaking from the plate heat exchanger or valve body
- Reduced hot water flow caused by scale or debris blocking the plates
Before you order
- Confirm the boiler model is the Alpha He25 (LPG)
- Check the existing part number 3.018684 or alternative code 3018684
- Verify the fault lies with the assembly rather than a separate component
- Consider whether system water quality may have contributed to the failure
Mechanical
| Part type | Plate heat exchanger and 3-way valve assembly |
|---|
Compliance
| Manufacturer part number (MPN) | 3018684 |
|---|---|
| Alternative numbers | 3018684, 3018684, 1260388 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA HE25 | 47-532-41 | 47-532-41 | — | — |
| ALPHA HE25 (LPG) | 47-532-42 | 47-532-42 | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
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