Vaillant
Vaillant Pilot Burner Injector 0020078903
Pilot burner injector nozzle for Vaillant gas appliances, with a 0.23 mm orifice for LPG.
At a glance
- Also known as 1383089
£9.60
£8.00 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 0020078903 is a pilot burner injector nozzle with a 0.23 mm orifice, intended for LPG operation. It meters gas into the pilot burner assembly on compatible Vaillant boilers and gas water heaters, so the pilot flame lights reliably and holds a stable shape. It is listed as replacing code 042857.
Signs this part needs replacing
- The pilot flame will not light, or lights and then extinguishes shortly after
- A weak, uneven or yellow-tipped pilot flame instead of a steady blue flame
- Sooting or discolouration around the pilot burner assembly
- Repeated lockouts or ignition faults on an LPG appliance
- Visible blockage, damage or wear at the injector orifice
Before you order
- Confirm your appliance model against the fitment list above
- Check the appliance is running on LPG, as this injector is sized for LPG
- Verify the existing injector orifice size and part number before removal
- Inspect the pilot assembly for debris or damage that may also need attention
Compliance
| GC number | 259-068 |
|---|---|
| Alternative numbers | 1383089 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT MAG 250/7 W (1977-1992) | — | — | — | |
| VAILLANT MAG 325/7 W (1977-1992) | — | — | — | |
| VAILLANT MAG 400/7 W (1977-1992) | — | — | — | |
| VAILLANT MAG 9/1 XZ (1999-2004) | — | — | — | |
| VAILLANT MAG SINE 250/7 W (1977-1992) | — | — | — | |
| VAILLANT MAG SINE 250/9 W (1993-1998) | — | — | — | |
| VAILLANT MAG SINE 325/7 W (1977-1993) | — | — | — | |
| VAILLANT MAG SINE 325/9 W (1993-1995) | — | — | — | |
| VAILLANT VAILLANT MAG SINE 250/7 W | — | — | — | |
| VAILLANT VAILLANT MAG SINE 250/9 W | — | — | — |
Showing 10 of 24 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.
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.