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Vaillant 103415 O-ring, (x10)

Vaillant

Vaillant 103415 O-ring, (x10)

Vaillant 103415 O-ring, a replacement seal for Vaillant water heating appliances, supplied individually as part number 103415.

At a glance

  • Part type: O-ring
  • Also known as VAILLANT103415
Manufacturer part no.
103415
Showing prices

£41.16

£34.30 ex. VAT · VAT at 20%

In stock
Cut-off passed — dispatches next 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 Vaillant 103415 is a replacement O-ring manufactured by Vaillant for use inside its water heating appliances. It sits at a joint or connection and compresses between the mating surfaces to stop water escaping while the appliance is in service. It belongs to the O-rings and lip seals group of spare parts and is supplied as a single item.

Signs this part needs replacing

  • A weep or drip at a joint, union or connection where the O-ring is seated.
  • Limescale staining or a thin water trail around the seal face.
  • The ring feels hard, flattened or cracked when removed instead of flexible.
  • Water appears only when the appliance is hot, as the seal expands and contracts with temperature.
  • Unexplained pressure loss on a sealed system that cannot be traced to another component.

Before you order

  • Confirm 103415 against the parts list for the exact appliance model and serial number.
  • Compare the profile and dimensions of the old ring with the replacement before fitting.
  • Inspect the mating surfaces for scoring, pitting or corrosion, which will damage a new seal.
  • Check whether the joint uses more than one seal and whether a gasket or seal kit is needed at the same time.

Not sure which part?

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