Vaillant
Vaillant Diverter Valve 509586
Vaillant draft diverter, 85 kW, part number 509586, for the Atmocraft VK 854/9 gas boiler.
At a glance
- Appliance family: Atmocraft VK 854/9
- Also known as 1378230
£288.97
£240.81 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Vaillant 509586 is a draft diverter rated at 85 kW, used on the Atmocraft VK 854/9 gas boiler. It sits in the flue path and manages the draw of combustion gases away from the appliance. The component is listed under diverter valves in the gas boiler spares range.
Signs this part needs replacing
- Combustion gases are not drawing correctly and the flue performance is visibly poor.
- The boiler locks out or shuts down during or shortly after ignition.
- Soot deposits or discolouration around the diverter or flue hood.
- Corrosion, distortion or physical damage to the diverter body.
- Unusual draught or spillage symptoms at the appliance.
Before you order
- Confirm the appliance model is the Atmocraft VK 854/9.
- Check the existing part number against the manufacturer's parts list for your appliance.
- Verify the 85 kW rating matches the appliance variant being worked on.
- Inspect the flue and combustion readings before condemning the diverter.
Compliance
| Barcode / EAN | 4024074485392 |
|---|---|
| Alternative numbers | 1378230 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT atmoCRAFT VK 854/9 (2004-2013) | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.