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Vaillant Gas Connection Tube 123434

Vaillant

Vaillant Gas Connection Tube 123434

Vaillant gas connection tube, part number 123434, for use in a range of Vaillant gas boilers.

At a glance

  • Also known as 1375712
  • Work on gas-carrying components must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
123434
Showing prices

£66.79

£55.66 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

Vaillant gas connection tube, part number 123434. This component forms part of the gas supply path within compatible Vaillant gas boilers. It is listed as a complete gas connection tube (CPL.) and is used across a range of VU and VUW series appliances.

Signs this part needs replacing

  • Visible corrosion, cracking or deformation on the tube
  • Gas smell or a detected leak at the tube or its joints
  • Weeping or staining at the connection points
  • Boiler failing to ignite or intermittent ignition due to restricted gas flow
  • Damage noted during routine servicing or repair

Before you order

  • Confirm your boiler model and GC number against the fitment list above.
  • Check the existing part number 123434 on the component or in the manufacturer's parts list.
  • Verify whether your appliance requires the complete tube assembly (CPL.) rather than individual fittings.
  • Work on gas-carrying components must be carried out by a Gas Safe registered engineer.

Not sure which part?

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