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Buderus O-Ring Pack 10 78175S

Buderus

Buderus O-Ring Pack 10 78175S

Buderus 78175S O-ring supplied in a pack of 10 for use on 500 series and Logamax PLUS Gb162 boilers.

At a glance

  • Also known as 2242135
Manufacturer part no.
78175S
Showing prices

£39.53

£32.94 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 Buderus 78175S is an O-ring supplied in a pack of 10. It is a sealing component used on Buderus 500 series and Logamax PLUS Gb162 appliances, where it seals a joint against water or oil leakage. The O-ring sits in the sealing groove of the mating part and is compressed when the assembly is tightened.

Signs this part needs replacing

  • Visible weeping or a damp trace around the joint the O-ring seals
  • A hardened, flattened or cracked O-ring when the joint is opened
  • Distortion or nibbling of the ring, often caused by over-tightening or a dry fit
  • Recurring pressure loss traced to a joint on the appliance
  • Discolouration or swelling of the ring consistent with contact with system fluid

Before you order

  • Confirm the appliance model against the fit list above
  • Check the existing O-ring size and seating groove before fitting a new one
  • Confirm the part number 78175S matches the number marked on the component or in the appliance documentation
  • Note that the part is supplied as a pack of 10, so check whether a single ring or the full pack is required

Not sure which part?

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