Comap Airfix E DHW Expansion Vessel 12L, 4.0 bar, 10 bar Max Pressure

The Comap Airfix E 12L expansion vessel is a specialized component engineered for domestic hot water (DHW) systems. It serves as a critical buffer to manage the natural thermal expansion of water as it heats up, thereby maintaining consistent pressure levels within the plumbing circuit. By absorbing excess volume, this vessel prevents dangerous pressure spikes and protects system components from unnecessary stress, contributing to a more reliable and durable installation.

Advantages

This expansion vessel offers exceptional reliability by effectively stabilizing pressure fluctuations that occur during the heating cycle of domestic hot water systems. Its robust construction ensures long-term performance, helping to prevent the premature wear of pipes, valves, and water heaters. By maintaining optimal pressure, it minimizes the risk of leaks and system failures, providing peace of mind for residential water heating setups.

Suitable for

• Domestic hot water (DHW) installations
• Residential water heating systems
• Systems requiring pressure stabilization during thermal expansion

This vessel is not suitable for use in central heating systems that utilize water with additives or non-potable water, as it is specifically designed for clean domestic hot water. It should not be installed in systems where the operating pressure consistently exceeds the 10 bar limit or where the temperature requirements fall outside the manufacturer's specified range for this model.

Key specifications

• Capacity: 12 liters
• Pre-charge pressure: 4.0 bar
• Maximum operating pressure: 10 bar
• Application: Domestic hot water systems

To install the Comap Airfix E, ensure it is connected to the cold water supply line of the water heater, typically between the check valve and the heater inlet. It should be mounted in a position that allows for easy maintenance and inspection. Ensure that the system is depressurized before installation and that all connections are properly sealed to prevent leaks. Once installed, verify that the pre-charge pressure matches the requirements of your specific system setup.

What to consider before purchase

• Verify the required capacity for your specific water heater volume
• Ensure the pre-charge pressure is compatible with your mains water pressure
• Check available installation space for the 12-liter unit

For optimal performance and longevity, it is recommended to have the expansion vessel installed by a qualified professional and to check the pre-charge pressure annually during routine maintenance of your hot water system.