Vaillant
Vaillant 203030 Piston (Yellow)
Vaillant 203030 yellow piston, listed for the MAG 275/9 W and MAG 275/9 XW water heaters.
At a glance
- Also known as 1377102
£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 203030 Piston (Yellow) is a yellow piston component supplied under Vaillant part number 203030. It is listed for use with Vaillant MAG 275/9 water heaters and is identified by its yellow finish.
Signs this part needs replacing
- Reduced or inconsistent hot water flow from the appliance
- The water heater failing to fire when a hot tap is opened
- Scale or debris visible on the piston when it is removed
- Sticking or restricted movement of the piston
Compliance
| Alternative numbers | 1377102 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT MAG 275/9 W (1992-1994) | — | — | — | |
| VAILLANT MAG 275/9 XW (1994-1997) | — | — | — |
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 documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.