Broag Expansion Vessel 720395601

A 10 litre expansion vessel supplied by Broag for use in Broag commercial boiler installations. It absorbs the volume increase of system water as it heats, limiting pressure rise within the sealed heating circuit. The part carries the manufacturer reference 720395601.

• System pressure climbs sharply as the boiler heats up and falls again once it cools.
• The pressure relief valve discharges water during normal operation.
• The pressure gauge reads high with a cold system, or fluctuates widely across a heating cycle.
• Water is present at the vessel's air valve when the charge point is depressed.
• The boiler locks out or shuts down on low or high pressure faults.

• Confirm the appliance model against the manufacturer's parts list before ordering.
• Check the capacity and connection arrangement of the existing vessel match this part.
• Verify the system's cold fill and charge pressures are set correctly before condemning the vessel.
• Check the part number 720395601 against the label or documentation on the existing component.