Vaillant
Vaillant Flange 180903
Vaillant 180903 flange for Ecomax, Ecotec and VU series gas boilers.
At a glance
- Appliance family: Ecomax, Ecotec and VU gas boilers
- Also known as 1376578
£178.97
£149.14 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 180903 is a flange supplied for use on Vaillant gas boilers in the Ecomax, Ecotec and VU ranges. It forms part of the boiler's hydraulic connection, seating against the mating face to create a sealed joint. It is a manufacturer-supplied component identified by Vaillant part number 180903.
Signs this part needs replacing
- Water weeping or dripping from the flange joint
- Visible corrosion, pitting or scaling on the flange face
- Staining or mineral deposits around the connection
- Repeated loss of system pressure traced to the flange area
- A damaged or distorted sealing face that will not seat cleanly
Before you order
- Confirm your boiler model against the fitment list above
- Check the GC number on the appliance data badge matches the model you are working on
- Verify the existing part number against the manufacturer's parts list for your appliance
- Inspect the mating face and seal before fitting, as these are separate items
Compliance
| Barcode / EAN | 4024074479056 |
|---|---|
| Alternative numbers | 1376578 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VU 656-7 | 41-044-59 | 41-044-59 | — | — |
| VAILLANT VU 656/4-5 | 41-044-59 | 41-044-59 | — | — |
| VAILLANT ecoMAX 665 VU 656-7 (2006-2006) | 41-044-59 | 41-044-59 | — | — |
| VAILLANT ecoTEC VU 656/4-5 (2007-2015) | 41-044-59 | 41-044-59 | — | — |
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.
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