Baxi
Baxi Return Hydroblock Assembly 7812552
Return hydroblock assembly 7812552 for Baxi 424, 624, 824 and Assure 524 Combi 2 boilers.
At a glance
- Appliance family: Baxi Combi 2
- Also known as 1794988
£97.34
£81.12 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 return hydroblock assembly is a Baxi hydraulic component used on Combi 2 appliances in the 424, 624, 824 and Assure 524 ranges. It forms part of the boiler's water circuit on the return side, housing the connections and internal waterways that return heating water through the appliance. It is supplied under Baxi part number 7812552.
Signs this part needs replacing
- Water weeping or dripping from the hydroblock body or its connection points
- Visible corrosion, scale or debris build-up on the hydroblock or its seals
- Repeated loss of system pressure with no other obvious source
- Staining or water marks on components beneath the hydroblock
Before you order
- Confirm your appliance model against the fit list above before ordering
- Check the pressure gauge variant where your model is listed with more than one option
- Have the appliance GC number to hand so the correct boiler variant can be identified
- Inspect the surrounding pipework and seals to confirm the hydroblock itself is the source of the fault
Compliance
| Alternative numbers | 1794988 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI 424 COMBI 2 | 47-077-51 | 47-077-51 | — | — |
| BAXI 424 COMBI 2 LPG | 47-077-53 | 47-077-53 | — | — |
| BAXI 424 ERP COMBI 2.1 | 47-077-74 | 47-077-74 | — | — |
| BAXI 424 LPG COMBI 2 | 47-077-53 | 47-077-53 | — | — |
| BAXI 624 COMBI 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 47-077-55 | 47-077-55 | — | — |
| BAXI 624 COMBI 2 - INTERNAL FIT PRESSURE GAUGE | 47-077-55 | 47-077-55 | — | — |
| BAXI 824 COMBI 2 | 47-077-63 | 47-077-63 | — | — |
| BAXI 824 COMBI 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 47-077-63 | 47-077-63 | — | — |
| BAXI ASSURE 524 COMBI 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 47-077-59 | 47-077-59 | — | — |
| BAXI ASSURE 524 COMBI 2 - INTERNAL FIT PRESSURE GAUGE | 47-077-59 | 47-077-59 | — | — |
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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