Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Vaillant Tundish 0020236140

Vaillant

Vaillant Tundish 0020236140

Vaillant tundish, part number 0020236140, for use with Vantage and VIH unvented cylinder installations.

At a glance

  • Part type: tundish
  • Also known as 1388340
Manufacturer part no.
0020236140
Showing prices

£47.76

£39.80 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 0020236140 is a tundish used on Vaillant unvented hot water cylinders. It provides a visible air gap at the termination of the discharge pipework from the cylinder's safety relief valves, allowing discharge to be seen and safely directed to a drain. It is fitted as part of the cylinder's discharge arrangement on the Vantage and VIH ranges.

Signs this part needs replacing

  • Water escaping from around the tundish body rather than passing cleanly through it
  • Continuous drip or discharge visible at the tundish when the cylinder is not calling for heat
  • Scale or debris build-up restricting flow through the tundish
  • Cracks, splits or distortion in the tundish body
  • Discharge pipework no longer held securely at the tundish connections

Before you order

  • Check the cylinder model and serial plate against the fit list above to confirm compatibility
  • Confirm the part number on the existing tundish matches 0020236140
  • Inspect the surrounding discharge pipework and relief valve outlets for damage or blockage before fitting
  • Verify the tundish is accessible and can be refitted at the correct position in the discharge run

Not sure which part?

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