Biasi
Biasi DHW Flow Switch BI1621112
DHW flow switch BI1621112 for selected Biasi Basica COND and Rinnova Adaptive combi boilers.
At a glance
- Part type: DHW flow switch
- Also known as 1651798
£20.21
£16.84 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 DHW flow switch (part number BI1621112) is a Biasi component used in the domestic hot water circuit of selected Basica COND and Rinnova Adaptive combi boilers. It detects water flow when a hot tap is opened and signals the boiler to start heating domestic hot water. It is a service part for the DHW side of the appliance only.
Signs this part needs replacing
- No hot water when a tap is opened, with the boiler failing to fire on a DHW demand
- Hot water only produced intermittently or after the tap has been running for some time
- Boiler fires for heating but does not respond to any domestic hot water draw-off
- Flow switch paddle or body sticking, scaled or mechanically worn
- DHW demand not registered despite adequate flow rate at the outlet
Before you order
- Confirm the appliance model and GC number against the fit list above
- Check the existing flow switch part number before ordering, as more than one variant may be used across the range
- Inspect the DHW circuit for scale or debris, which can affect a new switch once fitted
- Verify the fault is with the flow switch rather than the diverter valve, sensor or PCB before replacing
Compliance
| Alternative numbers | 1651798 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BIASI BASICA COND M275V.2024 SM | 47-583-49 | 47-583-49 | — | — |
| BIASI BASICA COND M275V.2428 SM | 47-583-50 | 47-583-50 | — | — |
| BIASI BASICA COND M275V.2832 SM | 47-583-51 | 47-583-51 | — | — |
| BIASI RINNOVA ADAPTIVE M300V.2025 SM | 47-583-46 | 47-583-46 | — | — |
| BIASI RINNOVA ADAPTIVE M300V.2530 SM | 47-583-47 | 47-583-47 | — | — |
| BIASI RINNOVA ADAPTIVE M300V.3035 SM | 47-583-48 | 47-583-48 | — | — |
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 — BASICA COND M275V.2024 SM (GC 47-583-49), BASICA COND M275V.2428 SM (GC 47-583-50), BASICA COND M275V.2832 SM (GC 47-583-51)
manualmanualBIASI appliance manual — RINNOVA ADAPTIVE M300V.2025 SM (GC 47-583-46), RINNOVA ADAPTIVE M300V.2530 SM (GC 47-583-47), RINNOVA ADAPTIVE M300V.3035 SM (GC 47-583-48)
manualNo technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.