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Vaillant Inside Wall Seal DN 102-165 0020018320

Vaillant

Vaillant Inside Wall Seal DN 102-165 0020018320

Vaillant inside wall seal, part 0020018320, sized for DN 102 to DN 165 wall penetrations.

At a glance

  • Also known as 1379734
Manufacturer part no.
0020018320
Showing prices

£20.83

£17.36 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 Vaillant Inside Wall Seal, part number 0020018320, is a sealing component used to close and weather the internal face of a wall penetration. It is sized to suit nominal diameters from DN 102 up to DN 165, covering the range of flue and pipe passes within that band. The seal forms the inner boundary of the penetration, sitting against the wall surface on the room side.

Before you order

  • Confirm the nominal diameter of the penetration to be sealed falls within the DN 102 to DN 165 range stated for this seal.
  • Check the part number 0020018320 against the appliance or installation documentation to confirm it is the component specified.
  • Inspect the existing seal for hardening, cracking or gaps before deciding whether a replacement is required.
  • Verify that the internal aperture and wall surface are clean and sound so the seal can sit flat once fitted.

Not sure which part?

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