Vaillant
Vaillant Connection Piece 509119
Brass connection piece for Vaillant ecoTEC Plus VU gas boilers, part number 509119.
At a glance
- Appliance family: ecoTEC Plus VU
- Also known as 1378126
Showing prices
£134.82
£112.35 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 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 509119 is a brass connection piece for the ecoTEC Plus VU range of gas boilers. It is used within the boiler assembly to join components together. The component is identified by Vaillant part number 509119.
Signs this part needs replacing
- Weeping or visible leaks at the connection
- Corrosion, pitting or green discolouration on the brass
- Staining or damp patches around the joint
- Difficulty achieving a leak-free seal when reassembling
- Unexplained loss of system pressure
Before you order
- Confirm your boiler's model and GC number against the fitment list above.
- Check the existing part number on the component or in the manufacturer's parts list.
- Isolate the appliance and depressurise before removing any connection.
- If your model is not listed, verify compatibility with Vaillant before ordering.
Compliance
| Barcode / EAN | 4024074481998 |
|---|---|
| Alternative numbers | 1378126 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VAILLANT ECOTEC PLUS 612 VU 126-3-5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 612 VU 126-3-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 612 VU 126-5-5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 612 VU 126-5-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 612 VU 126-5-5 R2 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 615 VU 156-3-5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 615 VU 156-3-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 615 VU 156-5-5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 615 VU 156-5-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 615 VU 156-5-5 R2 | — | — | — |
Showing 10 of 84 compatible appliances.
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.
manual
VAILLANT appliance manual — VU 126/3-5 (GC 41-044-44), VU 126/3-5 R1 (GC 41-044-44), VU 156/3-5 (GC 41-044-45), VU 156/3-5 R1 (GC 41-044-45), VU 186/3-5 (GC 41-044-46), VU 186/3-5 R1 (GC 41-044-46), VU 246/3-5 (GC 41-044-47), VU 246/3-5 R1 (GC 41-044-47), VU 306/3-5 (GC 41-044-48), VU 306/3-5 R1 (GC 41-044-48), VU 376/3-5 R1 (GC 41-044-49), ecoTEC PLUS 612 VU 126/3-5 (2005-2005) (GC 41-044-44), ecoTEC PLUS 612 VU 126/3-5 R1 (2005-2006) (GC 41-044-44), ecoTEC PLUS 615 VU 156/3-5 (2005-2005) (GC 41-044-45), ecoTEC PLUS 615 VU 156/3-5 R1 (2005-2006) (GC 41-044-45), ecoTEC PLUS 618 VU 186/3-5 (2005-2005) (GC 41-044-46), ecoTEC PLUS 618 VU 186/3-5 R1 (2005-2006) (GC 41-044-46), ecoTEC PLUS 624 VU 246/3-5 (2005-2006) (GC 41-044-47), ecoTEC PLUS 624 VU 246/3-5 R1 (2005-2006) (GC 41-044-47), ecoTEC PLUS 630 VU 306/3-5 (2005-2005) (GC 41-044-48), ecoTEC PLUS 630 VU 306/3-5 R1 (2005-2006) (GC 41-044-48), ecoTEC PLUS 637 VU 376/3-5 R1 - 2006-2006 (GC 41-044-49)
manualmanualVAILLANT appliance manual — VU 126/5-5 (GC 41-044-60), VU 126/5-5 R1 (GC 41-044-60), VU 156/5-5 (GC 41-044-61), VU 156/5-5 R1 (GC 41-044-61), VU 186/5-5 (GC 41-044-62), VU 186/5-5 R1 (GC 41-044-62), VU 246/5-5 (GC 41-044-63), VU 246/5-5 R1 (GC 41-044-63), VU 306/5-5 (GC 41-044-63), VU 306/5-5 R1 (GC 41-044-64), VU 376/5-5 (GC 41-044-65), VU 376/5-5 R1 (GC 41-044-65), ecoTEC PLUS 612 VU 126/5-5 (2012-2012) (GC 41-044-60), ecoTEC PLUS 612 VU 126/5-5 R1 (2012-2013) (GC 41-044-60), ecoTEC PLUS 615 VU 156/5-5 (2012-2012) (GC 41-044-61), ecoTEC PLUS 615 VU 156/5-5 R1 (2012-2013) (GC 41-044-61), ecoTEC PLUS 618 VU 186/5-5 (2012-2012) (GC 41-044-62), ecoTEC PLUS 618 VU 186/5-5 R1 (2012-2013) (GC 41-044-62), ecoTEC PLUS 624 VU 246/5-5 (2012-2012) (GC 41-044-63), ecoTEC PLUS 624 VU 246/5-5 R1 (2012-2013) (GC 41-044-63), ecoTEC PLUS 630 VU 306/5-5 (2012-2012) (GC 41-044-63), ecoTEC PLUS 630 VU 306/5-5 R1 (2012-2013) (GC 41-044-64), ecoTEC PLUS 637 VU 376/5-5 (2012-2012) (GC 41-044-65), ecoTEC PLUS 637 VU 376/5-5 R1 (2012-2013) (GC 41-044-65)
manualNo 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.