Alpha
Alpha Primary Heat Exchanger 1.021743
Primary heat exchanger for Alpha HE CB33 and He33 LPG boilers, part number 1.021743.
At a glance
- Appliance family: Alpha HE CB33 / He33
- Also known as PRIMARY-HEAT-EXCHANGER-HE-CB33, 1250316
Showing prices
£302.95
£252.46 ex. VAT · VAT at 20%
Available to order · 7 working days
Available to order · 7 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 Alpha 1.021743 is a primary heat exchanger for Alpha HE CB33 and He33 LPG boilers. It transfers heat from the combustion gases to the heating and hot water circuit. This component is specific to the LPG versions of these appliances.
Signs this part needs replacing
- Water leaking from the heat exchanger body or connections
- Kettling, banging or gurgling noises from the boiler
- Reduced heating or hot water performance
- Visible corrosion, scale or soot deposits on the exchanger
- Repeated boiler lockouts or overheating faults
Before you order
- Confirm your boiler model is Alpha HE CB33 or He33 (LPG)
- Check the GC number on your appliance data badge matches 47-532-44
- Verify the part number 1.021743 against the existing component
- Ensure your boiler is the LPG variant, as this part is listed for LPG models
Compliance
| GC number | H28-380 |
|---|---|
| Alternative numbers | PRIMARY-HEAT-EXCHANGER-HE-CB33, 1021743, 1250316 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA HE CB33 | 47-532-26 | 47-532-26 | — | — |
| ALPHA HE CB33 (LPG) | 47-532-44 | 47-532-44 | — | — |
| ALPHA HE33 | 47-532-43 | 47-532-43 | — | — |
| ALPHA HE33 (LPG) | 47-532-44 | 47-532-44 | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.
No technical questions yet for this part.
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