Baxi
Baxi Heat Exchanger DHW 50-Plates 7875802
Baxi 50-plate domestic hot water heat exchanger, part number 7875802, for Aquaheat HD/HWI and HI/HWI appliances.
At a glance
- Appliance family: Aquaheat HD/HWI and HI/HWI
- Also known as 1129426
£446.57
£372.14 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 Baxi 7875802 is a 50-plate domestic hot water (DHW) heat exchanger used in Baxi Aquaheat appliances. It transfers heat from the primary circuit to the domestic hot water supply, forming the plate stack that serves the hot water draw-off. It is a serviceable component within the appliance's DHW circuit.
Signs this part needs replacing
- Domestic hot water running hot and cold or fluctuating in temperature
- Reduced hot water flow rate at the taps
- Poor heat transfer between the primary circuit and the DHW supply
- Water weeping or staining around the plate stack
- Scale or debris blocking the plate channels
Before you order
- Confirm your appliance model against the fit list above
- Check the existing heat exchanger's plate count matches 50 plates
- Verify the part number 7875802 against the appliance's parts list
- Inspect the plate stack and connections for damage before fitting
Compliance
| Alternative numbers | 1129426 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI AQUAHEAT HD/HWI 12/50 | — | — | — | |
| BAXI AQUAHEAT HD/HWI 12/50 WITH HEAT METER & MERCURIUS | — | — | — | |
| BAXI AQUAHEAT HI/ HWI - 4/50 | — | — | — | |
| BAXI AQUAHEAT HI/HWI - 14/50 | — | — | — |
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 documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
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