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Vaillant Assembly Kit 0020005548

Vaillant

Vaillant Assembly Kit 0020005548

Vaillant assembly kit 0020005548 (alt 178771) for EcoTEC Pro combi boilers, covering mains water and wall jig pipework connections.

At a glance

  • Part type: Assembly kit
  • Also known as 178771, 1382952
Manufacturer part no.
0020005548
Showing prices

£307.03

£255.86 ex. VAT · VAT at 20%

Available to order · 1-2 working days
Available to order · 1-2 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

This is a Vaillant assembly kit, part number 0020005548, also listed under the alternative number 178771. It forms part of the water pipework arrangement on Vaillant EcoTEC Pro combi boilers, the section that carries water into the heating unit — the mains supply connection and the pipework mounted on the wall jig. It is a non-gas component, so it does not form part of the gas-carrying route through the appliance.

Signs this part needs replacing

  • Water weeping or dripping from the pipework joints at the wall jig
  • Damp patches, staining or corrosion around the boiler's water connections
  • Loose or perished seals causing persistent minor leaks at the assembly
  • Scale build-up or visible distortion on the pipework sections
  • Water loss from the boiler circuit that traces back to the jig pipework rather than the appliance internals

Before you order

  • Identify your appliance from its serial plate and cross-check the GC number against the compatibility list below.
  • Confirm the number on the existing component — 1382952 and 178771 both refer to this assembly.
  • Inspect the existing seals and connections on the wall jig before fitting, as worn seals may need separate attention.

Not sure which part?

Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.