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Vaillant Plug 0020039721

Vaillant

Vaillant Plug 0020039721

Vaillant 0020039721 plug for ecoCRAFT VKK series boilers, including VKK 806/3-E R1, VKK 2006/3-E R1 and VKK 2806/3-E R1 models.

At a glance

  • Part type: Plug
  • Also known as 1382971
Manufacturer part no.
0020039721
Showing prices

£9.60

£8.00 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 Vaillant 0020039721 is a plug for Vaillant ecoCRAFT VKK series boilers. It is used to close or seal a port on the appliance. This component is listed for the VKK 806/3-E R1, VKK 2006/3-E R1 and VKK 2806/3-E R1 models.

Signs this part needs replacing

  • Water weeping or dripping from around the plug
  • Visible corrosion, scale or mineral build-up on the plug
  • Dampness or staining on the appliance casing near the plug
  • The plug is seized, rounded or damaged at the head
  • The sealing face or washer is deteriorated

Before you order

  • Check the model and serial plate on the appliance to confirm it matches the fit list.
  • Compare the part number on the existing component with 0020039721.
  • Inspect the sealing face and any washer for damage before fitting.

Not sure which part?

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