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Potterton O-Ring 5142360

Potterton

Potterton O-Ring 5142360

8.73mm x 1.78mm EPDM O-ring, part 5142360, for Potterton Commercial Sirius 2 and Sirius 3 boilers.

Manufacturer part no.
5142360
Showing prices

£2.40

£2.00 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

A Potterton O-ring measuring 8.73mm x 1.78mm, supplied under part number 5142360 and manufactured in EPDM rubber. It is a sealing component used on Potterton Commercial Sirius 2 and Sirius 3 boiler appliances, where it seals a joint or connection against water or flue gas loss. The O-ring is a small consumable item that should be renewed whenever the joint it seals is disturbed.

Signs this part needs replacing

  • Visible water weeping or a drip trace at the joint the O-ring seals
  • The O-ring is split, cracked or has a flattened, deformed section
  • Rubber has hardened or lost its flexibility, so it no longer seals under compression
  • Scale or mineral deposits are present around the sealing face
  • A leak appears at the joint after the assembly has been opened for servicing

Before you order

  • Confirm the existing O-ring carries the 5142360 part number
  • Check the measured dimensions against 8.73mm x 1.78mm before fitting
  • Confirm the appliance model against the Sirius 2 or Sirius 3 listings
  • Verify EPDM is suitable for the circuit and media the O-ring seals

Not sure which part?

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