Biasi
Biasi CH Pressure Switch Membrane BI1011103
Central heating pressure switch membrane for Biasi gas boilers, including Garda, Parva, Prisma and RIVA models.
At a glance
- Also known as 1650077, N2230-A
Showing prices
£10.18
£8.48 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 Biasi BI1011103 is a central heating pressure switch membrane for Biasi gas boilers. It forms the flexible diaphragm inside the CH pressure switch, moving with changes in system water pressure to actuate the switch contacts. It is used across the Garda, Parva, Prisma and RIVA boiler families.
Signs this part needs replacing
- Boiler does not fire on a central heating or hot water demand
- Intermittent operation or repeated lockouts
- Pressure switch does not operate when the pump runs
- Membrane showing splits, hardening or distortion
- Water weeping from the pressure switch body
Before you order
- Confirm your boiler model against the fitment list above
- Check the existing pressure switch and its part number
- Inspect the switch housing, diaphragm seat and electrical connections for damage
Compliance
| GC number | E00-688 |
|---|---|
| Barcode / EAN | 8023585802373 |
| Alternative numbers | 1650077, N2230-A |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BIASI 24S | 47-970-10 | 47-970-10 | — | — |
| BIASI 24SR | 41-970-05 | 41-970-05 | — | — |
| BIASI 28S | 47-970-11 | 47-970-11 | — | — |
| BIASI BIASI 24S | — | — | — | |
| BIASI BIASI 24SR | — | — | — | |
| BIASI BIASI 28S | — | — | — | |
| BIASI BIASI GARDA HE M96-24SM/B | — | — | — | |
| BIASI BIASI GARDA HE M96-24SM/D | — | — | — | |
| BIASI BIASI GARDA HE M96-28SM/B | — | — | — | |
| BIASI BIASI GARDA HE M96-28SM/D | — | — | — |
Showing 10 of 101 compatible appliances.
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.
manual
BIASI appliance manual — 24S (GC 47-970-10), 24SR (GC 41-970-05), 28S (GC 47-970-11)
manualmanualBIASI appliance manual — GAIA 424RS (GC 41-970-04), GAIA 424S (GC 47-970-08), GAIA 428S (GC 47-970-09)
manualmanualBIASI appliance manual — GARDA HE M96.24SM/B (GC 47-970-25), GARDA HE M96.24SM/D (GC 47-970-27), GARDA HE M96.28SM/B (GC 47-970-26), GARDA HE M96.28SM/D (GC 47-970-28)
manualmanualBIASI appliance manual — GARDA HE M96.24SM/B2 (GC 47-583-03A), GARDA HE M96.24SM/D2 (GC 47-583-03B), GARDA HE M96.28SM/B2 (GC 47-583-04A), GARDA HE M96.28SM/D2 (GC 47-583-04B)
manualmanualBIASI appliance manual — GARDA HE PLUS M110.24SM/E (GC 47-970-31), GARDA HE PLUS M110.32SM/E (GC 47-970-32)
manualmanualBIASI appliance manual — GARDA M110B.24SM/E (GC 47-583-13), GARDA M110B.32SM/E (GC 47-583-14)
manualmanualBIASI appliance manual — GARDA M90F.24S (GC 47-970-19), GARDA M90F.24SR (GC 41-970-10), GARDA M90F.28S (GC 47-970-20), GARDA M90F.28SR (GC 41-970-11), GARDA M90F.32S (GC 47-970-22)
manualmanualBIASI appliance manual — PARVA HE M96.24SM/P (GC 47-583-08), PARVA HE M96.28SM/P (GC 47-583-09), PARVA HE M96.32SM/P (GC 47-583-10)
manualmanualBIASI appliance manual — PARVA HE M96.28SR/P (GC 41-583-05), PARVA HE M96.32SR/P (GC 47-583-06)
manualmanualBIASI appliance manual — PARVA M90 - 24S (GC 47-970-13), PARVA M90 - 24SR (GC 41-970-06), PARVA M90 - 28S (GC 47-970-14), PARVA M90 - 28SR (GC 41-970-07)
manualmanualBIASI appliance manual — PRISMA 24SE (GC 47-970-04), PRISMA 24SER (GC 41-970-02), PRISMA 28SE (GC 47-970-05)
manualmanualBIASI appliance manual — RIVA ADVANCE HE M110.24SM/C (GC 47-970-29), RIVA ADVANCE HE M110.32SM/C (GC 47-970-30)
manualmanualBIASI appliance manual — RIVA ADVANCE HE M110B.24SM/C (GC 47-583-11), RIVA ADVANCE HE M110B.32SM/C (GC 47-583-12)
manualmanualBIASI appliance manual — RIVA ADVANCE HE M110B.24SR/C (GC 41-583-07)
manualmanualBIASI appliance manual — RIVA COMPACT HE M96.24SM/C (GC 47-970-23), RIVA COMPACT HE M96.28SM/C (GC 47-970-24), RIVA COMPACT HE M96.28SR/C (GC 41-970-12)
manualmanualBIASI appliance manual — RIVA COMPACT HE M96.24SR/C2 (GC 41-583-08), RIVA COMPACT HE M96.28SR/C2 (GC 41-583-02)
manualmanualBIASI appliance manual — RIVA COMPACT HE M96.28SM/C2 (GC 47-583-06)
manualmanualBIASI appliance manual — RIVA COMPACT HE M96A.24SR/C (GC 41-583-09), RIVA COMPACT HE M96A.28SR/C (GC 41-583-10)
manualmanualBIASI appliance manual — RIVA COMPACT M90E.24S (GC 47-970-17), RIVA COMPACT M90E.28S (GC 47-970-18), RIVA COMPACT M90E.32S (GC 47-970-21)
manualmanualBIASI appliance manual — RIVA PLUS M90D.24S (GC 47-970-15), RIVA PLUS M90D.24SR (GC 41-970-08), RIVA PLUS M90D.28S (GC 47-970-16), RIVA PLUS M90D.28SR (GC 41-970-09)
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