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Vaillant Draft Diverter 509585

Vaillant

Vaillant Draft Diverter 509585

Vaillant draft diverter, part 509585, rated at 75 kW for the Atmocraft VK 754/9 gas boiler.

At a glance

  • Appliance family: Atmocraft VK 754/9
  • Also known as 1378228
Manufacturer part no.
509585
Showing prices

£221.08

£184.23 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 509585 is a draft diverter rated at 75 kW, used on the Atmocraft VK 754/9 gas boiler. It sits in the flue gas path and stabilises the draught across the appliance, helping to maintain consistent combustion and safe evacuation of flue products. It is supplied as a complete assembly.

Signs this part needs replacing

  • Visible corrosion, distortion or cracking of the diverter body or its sealing faces
  • Flue products spilling or unstable draught readings at the appliance
  • Soot or staining around the diverter indicating poor evacuation of combustion products
  • Boiler lockouts or combustion faults traced to the flue gas path
  • Physical damage found during a service or flue inspection

Before you order

  • Confirm the appliance model is the Atmocraft VK 754/9 and that the existing diverter is rated at 75 kW
  • Check the part number 509585 against the marking on the component being replaced
  • Inspect the surrounding flue components and seals, as damage is often not confined to the diverter alone
  • Flue gas path components should be fitted and commissioned by a competent heating engineer

Not sure which part?

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