Potterton
Potterton Automatic Air Vent 5142120
Potterton automatic air vent, part 5142120, for Potterton Commercial Sirius FS boilers.
At a glance
- Part type: automatic air vent (AAV)
- Appliance family: Potterton Commercial Sirius FS
£109.20
£91.00 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 automatic air vent, manufacturer part number 5142120, is a Potterton Commercial component. It is fitted to Potterton Commercial Sirius FS boilers, where it discharges air that collects in the water circuit during filling and normal running. The vent opens automatically as air accumulates, allowing it to escape rather than being carried around the system.
Signs this part needs replacing
- Water weeping or dripping from the vent body or cap
- Air continuing to collect in the system despite the vent being fitted
- Boiler or system noise and gurgling that points to trapped air
- Corrosion or scale build-up around the vent outlet
- Repeated loss of system pressure alongside visible moisture at the vent
Before you order
- Confirm the boiler model against the fit list above before ordering
- Check the part number on the existing vent or in the boiler documentation matches 5142120
- Inspect the connection and mounting arrangement on the existing vent against the replacement
- Confirm whether any associated seals or washers are required for the installation
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS FS 400 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS FS 525 | — | — | — |
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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