Biasi
Biasi Water Pressure Switch 0.5 Bar BI1001122
Biasi water pressure switch rated at 0.5 bar, suitable for Savio GAIA 424, 428 and 424S models up to serial number N228790998.
At a glance
- Appliance family: Savio GAIA
- Also known as WATER-PRESSURE-SWITCH-05BAR, 1650019
£34.90
£29.08 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 Biasi BI1001122 is a water pressure switch rated at 0.5 bar, used on Biasi Savio GAIA boilers. It monitors water pressure in the heating circuit and signals the boiler control when pressure is present, allowing the appliance to run. This version is specified for appliances up to serial number N228790998.
Signs this part needs replacing
- Boiler fails to fire or locks out despite adequate system pressure at the gauge.
- Boiler will not run at all with the pressure gauge reading normal.
- Intermittent firing or unexplained lockouts that clear on their own.
- No pressure signal reaching the control board during a demand for heat.
- Boiler runs only when pressure is raised well above the normal cold fill figure.
Before you order
- Confirm the boiler model matches one listed in the Fits section.
- Check the appliance serial number is at or below N228790998, as later builds use a different switch.
- Verify the existing switch pressure rating before ordering.
- Confirm the system pressure reading on the gauge is correct, as a faulty gauge can mimic a switch fault.
Compliance
| GC number | E39-265 |
|---|---|
| Barcode / EAN | 8023585801130 |
| Alternative numbers | WATER-PRESSURE-SWITCH-05BAR, 1650019 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BIASI BIASI SAVIO GAIA 424S | — | — | — | |
| BIASI BIASI SAVIO GAIA 424SR | — | — | — | |
| BIASI BIASI SAVIO GAIA 428S | — | — | — | |
| BIASI GAIA 424RS | 41-970-04 | 41-970-04 | — | — |
| BIASI GAIA 424S | 47-970-08 | 47-970-08 | — | — |
| BIASI GAIA 428S | 47-970-09 | 47-970-09 | — | — |
Documents & drawings
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