Warmflow 12 Litre Pressure Vessel 2128

The Warmflow 2128 is a 12 litre pressure vessel supplied for Warmflow oil combi boilers. It provides the expansion capacity within the sealed heating circuit, absorbing the volume change of the system water as it heats and cools. It is listed under expansion vessels in the Warmflow boiler spares range.

• System pressure rises quickly when the boiler heats up and falls again once it cools.
• The pressure relief valve discharges water during normal heating cycles.
• Water is found at the vessel's Schrader valve when the charge is checked, indicating a failed internal diaphragm.
• The vessel feels heavy or full of water when tapped, rather than hollow.
• The boiler locks out or cuts out on pressure-related faults.

• Confirm the appliance is a Warmflow oil combi model.
• Check the existing vessel's capacity is 12 litres before ordering.
• Verify the system pressure and expansion vessel charge have been checked with an accurate gauge.
• Confirm the connection size and orientation of the existing vessel match the replacement.