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Biasi DHW Flow Switch BI1271101

Biasi

Biasi DHW Flow Switch BI1271101

DHW flow switch for Biasi gas boilers, suitable for models up to serial number N018390805.

At a glance

  • Also known as 1651021
Manufacturer part no.
BI1271101
GC number
H32-551
Showing prices

£36.62

£30.52 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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 BI1271101 is a domestic hot water (DHW) flow switch used in Biasi gas boilers. It detects water flow through the DHW circuit and signals the boiler to begin heating when a hot water tap is opened. This variant is specified for appliances up to serial number N018390805.

Signs this part needs replacing

  • No hot water demand is registered when a tap is opened, so the boiler does not fire in DHW mode.
  • Hot water runs cold or only warms intermittently while the heating circuit works normally.
  • The boiler fires and shuts down repeatedly during a hot water draw-off.
  • DHW performance becomes inconsistent, with delays before the burner lights.
  • The switch shows signs of scale, debris or mechanical wear on inspection.

Before you order

  • Confirm the boiler serial number is at or below N018390805, as this switch is specified for appliances up to that number.
  • Check the appliance model against the fitment list above.
  • Verify the existing part number BI1271101 before ordering.
  • Inspect the DHW circuit for scale or debris that may have caused the original switch to fail.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.