Baxi
Baxi Pressure Differential Assembly 248728
Pressure differential assembly for Baxi Combi Instant and Potterton Performa combi boilers, part 248728.
At a glance
- Also known as PRESSURE-DIFFERENTIAL-VLV-KIT, N0271-1
£122.40
£102.00 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 Pressure Differential Assembly, part number 248728, is a diverter valve component used on Baxi Combi Instant and Potterton Performa combi boilers. It senses the pressure difference across the heating and hot water circuits and moves the diverter valve to switch the boiler between domestic hot water and central heating operation.
Signs this part needs replacing
- The boiler does not switch between central heating and hot water, or hot water runs while the heating is off
- Diverter valve fails to respond when a hot tap is opened
- Intermittent or reduced domestic hot water, particularly with the heating running
- Water weeping or leaking around the differential assembly on the diverter valve body
- Weak or absent movement of the diverter pin, indicating internal component wear
Before you order
- Confirm your boiler model against the fitment list above
- Check the GC number on the appliance data badge to identify the exact variant
- Inspect the diverter valve body and surrounding seals for damage before fitting
- Confirm whether the assembly alone or the full valve kit is required for the repair
Compliance
| GC number | E68-185 |
|---|---|
| Alternative numbers | PRESSURE-DIFFERENTIAL-VLV-KIT, N0271-1 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI COMBI INSTANT 105E | 47-075-09 | 47-075-09 | — | — |
| BAXI COMBI INSTANT 105HE | 47-075-19 | 47-075-19 | — | — |
| BAXI COMBI INSTANT 80E | 47-075-13 | 47-075-13 | — | — |
| BAXI COMBI INSTANT 80HE | 47-075-17 | 47-075-17 | — | — |
| POTTERTON PERFORMA 24I HE | 47-393-12 | 47-393-12 | — | — |
| POTTERTON PERFORMA 28I | 47-393-08 | 47-393-08 | — | — |
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.
BAXI appliance manual — COMBI INSTANT 105E (GC 47-075-09), COMBI INSTANT 80E (GC 47-075-13)
manualmanualBAXI appliance manual — COMBI INSTANT 105HE (GC 47-075-19), COMBI INSTANT 80HE (GC 47-075-17)
manualmanualPOTTERTON appliance manual — PERFORMA 24I HE (GC 47-393-12)
manualmanualPOTTERTON appliance manual — PERFORMA 28I (GC 47-393-08)
manualNo technical questions yet for this part.
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