Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Hanicks
Basket
Buderus O-Ring 87mm x 3mm NBR70 CG25 Kit 2 Piece 63020362

Buderus

Buderus O-Ring 87mm x 3mm NBR70 CG25 Kit 2 Piece 63020362

Buderus 87mm x 3mm NBR70 O-ring kit, supplied as a 2-piece set for GB312 series boilers.

At a glance

  • Also known as 2241607
Manufacturer part no.
63020362
Showing prices

£11.83

£9.86 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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

This is a Buderus O-ring kit, supplied in the size 87mm x 3mm and manufactured in NBR70 nitrile rubber. It is used as a sealing component on Buderus GB312 series gas condensing boilers, where the O-ring seats and seals a joint against water or gas leakage. The kit is supplied as a 2-piece set.

Signs this part needs replacing

  • Visible cracking, hardening or flattening of the O-ring after removal
  • Weeping or dripping at the sealed joint during operation
  • Water staining or mineral deposits around the joint face
  • Persistent pressure loss traced to the sealed connection
  • O-ring swells or deforms when exposed to system water or heat

Before you order

  • Confirm the O-ring size required is 87mm x 3mm
  • Check the appliance model against the fit list above
  • Verify the existing O-ring material is suitable for the application
  • Confirm the required quantity, as the kit is supplied as 2 pieces

Not sure which part?

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