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ATAG Gasket H.E/Top Part OSS3/4

Obsolete Items

ATAG Gasket H.E/Top Part OSS3/4

ATAG heat exchanger and top gasket, part OSS3/4, for use with the relevant ATAG boiler range.

At a glance

  • Appliance family: boiler
Manufacturer part no.
S4719900
Showing prices

£37.82

£31.52 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 ATAG Gasket H.E/Top Part OSS3/4 is a sealing gasket for the heat exchanger and top assembly of an ATAG boiler. Its function is to maintain a sound seal at the heat exchanger joint, helping to prevent combustion gases and water leaks.

Before you order

  • Confirm the part number OSS3/4 against the marking on your existing gasket or the boiler documentation.
  • Check the boiler make and model to ensure the gasket matches the heat exchanger and top assembly.
  • Note that this item is listed as obsolete, so check stock availability before committing to a repair.

Not sure which part?

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