Broag
Broag Buffer Expansion Vessel 720391501
Buffer expansion vessel, part 720391501, for Broag Commercial boiler spares.
At a glance
- Also known as 2203822
£13.68
£11.40 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
A buffer expansion vessel supplied under part number 720391501 by Broag. It is listed for Broag Commercial boiler spares and forms part of the appliance's expansion vessel arrangement. The vessel absorbs changes in system water volume as the boiler heats and cools, helping to keep system pressure stable.
Signs this part needs replacing
- System pressure rises sharply when the boiler heats up and falls again once it cools.
- The pressure relief valve discharges water during normal heating cycles.
- Frequent low-pressure faults or boiler lockouts that need repeated topping up.
- Water, corrosion or staining around the vessel body or its connection.
- The vessel feels heavy or full of water when checked, rather than hollow.
Before you order
- Confirm the appliance model against the manufacturer's parts list.
- Check the part number 720391501 matches the vessel currently fitted.
- Inspect the vessel connection and mounting arrangement before removal.
- Verify the system pressure and expansion vessel charge as part of fault diagnosis.
Compliance
| Alternative numbers | 2203822 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BROAG COMMERCIAL BROAG SPARE PARTS | — | — | — |
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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