Vaillant
Vaillant Diaphragm 115300
Diaphragm for Vaillant MAG Mini 11-0/0 XI and XZ water heaters, part number 115300.
At a glance
- Part type: diaphragm
- Appliance family: MAG Mini
- Also known as 1387278
£10.64
£8.87 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 115300 is a diaphragm for Vaillant MAG Mini water heaters. It is a flexible membrane used in the appliance's water section, where it responds to changes in water pressure during operation. This part is listed for the MAG Mini 11-0/0 XI and XZ models.
Signs this part needs replacing
- Water leaking from the diaphragm housing or water section
- Reduced or inconsistent hot water flow
- Appliance failing to fire or cutting out during draw-off
- Water pressure fluctuations affecting appliance operation
- Visible splits, hardening or distortion on the diaphragm
Before you order
- Confirm the appliance is a Vaillant MAG Mini 11-0/0 XI or XZ
- Check the model and serial details on the appliance data plate
- Compare the existing part number against 115300
- Inspect the diaphragm housing and seals for damage before refitting
Compliance
| Alternative numbers | 1387278 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT MAG mini 11-0/0 XI (2004) | — | — | — | |
| VAILLANT MAG mini 11-0/0 XZ (2004) | — | — | — |
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.
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