Vaillant
Vaillant Air Inlet Duct 103404
Vaillant 103404 air inlet duct, cpl., for ecoTEC PLUS and PRO gas boilers.
At a glance
- Appliance family: ecoTEC PLUS and ecoTEC PRO
- Also known as 1375300
£76.64
£63.87 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 103404 is a complete air inlet duct for Vaillant ecoTEC gas boilers. It forms the air intake path on the appliance, feeding combustion air to the burner assembly. It is listed by the manufacturer as an air inlet duct, cpl.
Signs this part needs replacing
- Visible cracks, splits or brittleness in the duct body
- Air leaking at the duct joints, often heard as a whistle or hiss
- Perished or hardened sealing faces where the duct meets the appliance
- Combustion readings drifting outside the expected range on service
- Duct distorted or misaligned so it no longer seats correctly
Before you order
- Confirm your boiler model and variant (for example R1, R3 or R5) against the fit list above
- Check the part number on the existing duct matches 103404
- Inspect the sealing faces and surrounding components before fitting
- Verify the appliance is the ecoTEC PLUS or ecoTEC PRO range, not another Vaillant family
Compliance
| Barcode / EAN | 4024074479902 |
|---|---|
| Alternative numbers | 1375300 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VAILLANT ECOTEC PLUS 624 VU 246-3-5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 624 VU 246-3-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 630 VU 306-3-5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 630 VU 306-3-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 831 - VUW 316/3-5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 831 - VUW 316/3-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 831 - VUW 316/3-5 R3 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 831 - VUW 316/3-5 R5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PRO 28 - VUW 286/3-3 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PRO 28 - VUW 286/3-3 R1 | — | — | — |
Showing 10 of 34 compatible appliances.
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.
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