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Biasi O-Ring Gasket 1.9mm x 4.9mm DHW Pressure Switch Pipe BI1001116

Biasi

Biasi O-Ring Gasket 1.9mm x 4.9mm DHW Pressure Switch Pipe BI1001116

O-ring gasket for the DHW pressure switch pipe on Biasi gas boilers, measuring 1.9 mm × 4.9 mm.

At a glance

  • Also known as O-RING-19-X-49-DHW-PRESS, 1650015
Manufacturer part no.
BI1001116
GC number
E01-203
Showing prices

£0.68

£0.57 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 BI1001116 is an O-ring gasket measuring 1.9 mm × 4.9 mm, used on the DHW pressure switch pipe of Biasi gas boilers. It seals the pipe connection to prevent water loss and protect the pressure switch from moisture ingress. The part sits within the Biasi boiler spares range under O-rings, washers and gaskets.

Signs this part needs replacing

  • Water weeping or dripping from the DHW pressure switch pipe joint.
  • The O-ring appears flattened, cracked or perished.
  • The DHW pressure switch fails to operate or works intermittently.
  • Scale or corrosion visible around the pipe connection.
  • Loss of DHW pressure or repeated boiler lockouts on hot water demand.

Before you order

  • Confirm BI1001116 matches the part number in your boiler's parts list.
  • Check the O-ring dimensions (1.9 mm × 4.9 mm) against the one removed.
  • Verify your appliance model appears in the Fits section above.
  • Inspect the pressure switch pipe and housing for damage before fitting.

Not sure which part?

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