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Alpha O'Ring 63 X 3 Nitrile CD24S/C 1.5539

Alpha

Alpha O'Ring 63 X 3 Nitrile CD24S/C 1.5539

Nitrile O-ring, 63 x 3 mm, listed for Alpha CD24S/C boilers under manufacturer part number 1.5539.

At a glance

  • Also known as ORING-63-X-3-NITRILE-CD24SC, 1250407
Manufacturer part no.
1.5539
Showing prices

£11.51

£9.59 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

The Alpha 1.5539 is a nitrile rubber O-ring with a 63 x 3 mm section, listed for the Alpha CD24S/C boiler. It provides a compression seal at a joint face, where the rubber is squeezed between two mating surfaces to stop water or gas escaping. The nitrile compound is the standard choice for sealing against oils, fuels and water in heating applications.

Before you order

  • Confirm the removed O-ring measures 63 x 3 mm, as bore and cross-section both need to match.
  • Check that nitrile is suitable for the medium and operating temperature at the joint being sealed.
  • Cross-reference 1.5539 against the boiler's parts list before ordering.
  • Inspect the mating surfaces for corrosion, scoring or old seal residue, as these will cause a new O-ring to leak.

Not sure which part?

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