Viessmann
Viessmann Flue Gas Non-Return Device 7438858
Viessmann flue gas non-return device, part number 7438858, for gas boiler flue systems.
At a glance
- Also known as 2321280
£85.33
£71.11 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 Viessmann 7438858 is a flue gas non-return device used in the flue gas path of Viessmann gas boiler installations. It prevents reverse flow of flue gases, keeping the flue gas route one-directional under normal operating conditions. It is supplied as a spare component for Viessmann gas boilers.
Before you order
- Confirm the part number 7438858 against the appliance documentation or the existing component.
- Check the boiler model and flue configuration against Viessmann's parts listing for that appliance.
- Flue gas components should be fitted and commissioned by a competent heating engineer in line with the manufacturer's instructions.
Compliance
| Alternative numbers | 2321280 |
|---|
No fitment data held for this part.
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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