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Vaillant Valve 1/4 Inch 0020266447

Vaillant

Vaillant Valve 1/4 Inch 0020266447

Vaillant 1/4 inch valve, part number 0020266447, for Arotherm VWL S2 air source heat pump units.

At a glance

  • Appliance family: Arotherm 5/5 VWL S2
  • Also known as 1389020
Manufacturer part no.
0020266447
Showing prices

£29.26

£24.38 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 0020266447 is a 1/4 inch valve supplied for use in Vaillant Arotherm VWL S2 air source heat pump units. It forms part of the appliance's internal pipework and valve assembly, controlling flow through the 1/4 inch connection it is fitted to. The part is listed by Vaillant under the Arotherm 5/5 VWL S2 platform.

Signs this part needs replacing

  • Visible weeping or a drip trail at the valve body or its connection
  • Stiff, seized or non-responsive valve operation
  • Scale, corrosion or debris build-up around the valve seat
  • Unexplained loss of system pressure traced to the valve area
  • Discolouration or staining on nearby pipework indicating a long-standing leak

Before you order

  • Confirm the appliance model and variant from the data plate against the fit list above
  • Check the valve size required at the connection point is 1/4 inch
  • Compare the part number on the existing component with 0020266447
  • Verify the unit is an Arotherm VWL S2 rather than an earlier or later Arotherm variant

Not sure which part?

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