Andrews
Andrews Heat Exchanger Kit 7700302
Heat exchanger kit 7700302 for Andrews Fastflo water heaters.
At a glance
- Also known as 1822862
Showing prices
£1,046.22
£871.85 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 Andrews heat exchanger kit, part number 7700302, is a service component for Andrews Fastflo water heaters. It transfers heat into the domestic hot water circuit within the appliance. The kit is identified by the model reference WHIX49.
Signs this part needs replacing
- Reduced hot water output or inconsistent temperatures
- Water leaking from the heat exchanger area
- Scale or corrosion visible on the exchanger surfaces
- Kettling or unusual noises during heating
- Repeated lockouts or overheating faults
Before you order
- Check the appliance data plate to confirm the model, such as Fastflo WHIX49 or LWHIX49.
- Confirm the part number 7700302 matches the component being replaced.
- Inspect the existing heat exchanger for scale, corrosion or leaks before ordering.
- Refer to the manufacturer's parts list if your model is not listed.
Compliance
| Alternative numbers | 1822862 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ANDREWS WATER HEATERS ANDREWS HOT WATER SPARES | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO LWHIX49 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO WHIX49 | — | — | — |
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.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.