Biasi
Biasi Expansion Vessel BI1262100
Expansion vessel for Biasi Riva Plus HE ERP boilers, absorbing expansion in the sealed heating system.
At a glance
- Part type: expansion vessel
- Appliance family: Riva Plus HE ERP
- Also known as 1651620
£120.10
£100.08 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 BI1262100 is an expansion vessel intended for use in Biasi Riva Plus HE ERP boilers. It provides the air cushion that absorbs the volume increase of water as the sealed heating system heats up, helping to keep system pressure stable. It is a boiler component rather than a system accessory.
Signs this part needs replacing
- System pressure climbs rapidly once the boiler is running and the water heats up.
- The pressure relief valve discharges, or water is found at the discharge pipe, during normal operation.
- The pressure gauge swings noticeably between cold and hot states.
- System pressure falls away again after the boiler cools, with repeated topping up needed.
- Water is present at the vessel connection or the vessel feels heavy when removed.
Before you order
- Confirm the boiler model and GC number from the appliance data badge against the fit list above.
- Check the vessel connection size and charge pressure against the manufacturer's parts list for your model.
- Confirm whether your appliance uses an integral or remotely mounted vessel before ordering.
- Verify the part number BI1262100 appears in the manufacturer's literature for your boiler.
Compliance
| GC number | H20-998 |
|---|---|
| Alternative numbers | 1651620 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BIASI RIVA PLUS HE 24C ERP | 47-583-41 | 47-583-41 | — | — |
| BIASI RIVA PLUS HE 24C ERP | — | — | — | |
| BIASI RIVA PLUS HE 24C ERP LPG | 47-583-41 | 47-583-41 | — | — |
| BIASI RIVA PLUS HE 24S ERP | 41-583-31 | 41-583-31 | — | — |
| BIASI RIVA PLUS HE 24S ERP | — | — | — | |
| BIASI RIVA PLUS HE 24S ERP LPG | 41-583-31 | 41-583-31 | — | — |
| BIASI RIVA PLUS HE 28C ERP | 47-583-42 | 47-583-42 | — | — |
| BIASI RIVA PLUS HE 28C ERP | — | — | — | |
| BIASI RIVA PLUS HE 28C ERP LPG | 47-583-42 | 47-583-42 | — | — |
| BIASI RIVA PLUS HE 28S ERP | 41-583-32 | 41-583-32 | — | — |
Showing 10 of 20 compatible appliances.
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.
BIASI appliance manual — RIVA PLUS HE 24C ERP (GC 47-583-41), RIVA PLUS HE 24C ERP LPG (GC 47-583-41), RIVA PLUS HE 28C ERP (GC 47-583-42), RIVA PLUS HE 28C ERP LPG (GC 47-583-42)
manualmanualBIASI appliance manual — RIVA PLUS HE 24S ERP (GC 41-583-31), RIVA PLUS HE 24S ERP LPG (GC 41-583-31), RIVA PLUS HE 28S ERP (GC 41-583-32), RIVA PLUS HE 28S ERP LPG (GC 41-583-32)
manualmanualBIASI appliance manual — RIVA PLUS HE M296.24SM/C (GC 47-583-24), RIVA PLUS HE M296.24SM/C LPG (GC 47-583-24), RIVA PLUS HE M296.28SM/C (GC 47-583-25), RIVA PLUS HE M296.28SM/C LPG (GC 47-583-25)
manualmanualBIASI appliance manual — RIVA PLUS HE M296.24SR/C (GC 41-583-18), RIVA PLUS HE M296.24SR/C LPG (GC 41-583-18), RIVA PLUS HE M296.28SR/C (GC 41-583-19), RIVA PLUS HE M296.28SR/C LPG (GC 41-583-19)
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