Valor MW Series 2L Expansion Vessel Z200 97783206

The Z200 is a 2 litre expansion vessel from the Valor MW Series, supplied under part number 97783206. It absorbs the volume change of heated water within a sealed system, limiting pressure rise and protecting the appliance and its components from excess stress. It is listed for use across the Valor Group spare parts range.

• Water discharging from the pressure relief valve during normal heating cycles
• System pressure rising sharply when the appliance heats up and falling again once it cools
• Pressure gauge readings that swing widely or sit higher than the usual cold fill pressure
• Water or moisture present at the vessel's air valve, indicating a failed internal diaphragm
• Repeated low pressure faults or lockouts that need frequent topping up to clear

• Confirm the appliance model and serial number against the manufacturer's parts list
• Check the existing vessel's capacity and model marking to confirm the 2 litre Z200 is the correct unit
• Verify the part number 97783206 matches the number shown on the component or in the appliance documentation
• Check the vessel's connection size and mounting arrangement against the failed unit before removal