Broag Pipe Expansion Vessel 720401001

The Pipe Expansion Vessel, manufacturer part number 720401001, is a Broag component intended for use within Broag commercial boiler installations. It forms part of the boiler's expansion arrangement, accommodating changes in system water volume as the boiler heats and cools. It is listed under expansion vessels within the boiler spares range.

• Persistent pressure loss on the system that cannot be traced to a visible leak elsewhere.
• Water discharging from the pressure relief valve during normal heating cycles.
• System pressure rising sharply as the boiler heats up and falling again once it cools.
• Visible corrosion, weeping or water staining on the vessel body or its connection.
• The vessel feels full of water or gives no audible response when the system is drained and the connection is checked.

• Confirm the boiler model and that part number 720401001 is listed for it.
• Check the existing vessel's connection and mounting arrangement against the part before removal.
• Verify the system has been depressurised and drained before any work begins.
• Confirm whether any associated seals or fittings are required separately, as these are not stated for this part.