Drinking water expansion vessels
Drinking water expansion vessels are essential components in domestic hot water systems to manage thermal expansion safely and efficiently. These vessels are designed to accommodate the volume changes caused by temperature fluctuations in closed water systems. The category includes wall-mounted, horizontal, and vertical models with capacities ranging from 2L to 500L. They are suitable for installation in residential and commercial buildings where potable water systems require pressure stabilisation and expansion control.
Products are available with various connection sizes, including 3/4" threads, and are constructed to operate within a temperature range of -10°C to +99°C, with a recommended maximum operating temperature of +80°C. Some models include a built-in manometer for pressure monitoring and are CE marked in accordance with EU pressure equipment directives.
How to choose
- Choose the correct capacity based on the system volume and expected thermal expansion, with options from 2L up to 500L.
- Ensure the vessel has the correct connection type and size, such as 3/4" thread, to match the system piping.
- Verify that the vessel is compatible with potable water systems and features a replaceable EPDM membrane for long-term use.
- Select a model with a suitable orientation—vertical, horizontal, or wall-mounted—based on available installation space.
Frequently asked questions
What is the maximum operating temperature for these vessels?
The recommended maximum operating temperature is +80°C, with a full range of -10°C to +99°C for storage.
Can the membrane be replaced?
Yes, certain models feature a replaceable EPDM membrane in a vacuum-sealed design for easy maintenance.
Product sorting
List of products
This pressure expansion vessel is designed for water systems operating at up to 8...
This pressure expansion vessel is intended for use in potable water systems by...
The IVAR AC 18 AQUACOLD pressure expansion vessel is designed for water systems...
Designed for cold water systems in residential and commercial buildings, the IVAR...
This pressure expansion vessel is intended for use in potable water systems by...
Designed for potable water systems in residential and commercial buildings, this...
The IBAIONDO 12L expansion vessel is designed for domestic hot water systems. It...
The Hydroland IBAIONDO 18L expansion vessel is designed for domestic hot water...
The IBAIONDO 24L expansion vessel is designed for domestic hot water systems to...
The Hydroland IBAIONDO 5L expansion vessel is suitable for domestic hot water...
Designed for installers working on closed hot water systems, this 8L expansion...
The HVP 100L galvanised pressure vessel is designed for use in water supply...
This galvanized pressure vessel is suitable for domestic wells and industrial...
The Hydro-Vacuum HVP 300L galvanized pressure vessel is designed for potable water...
The IBO pressure vessel 100l upright-slatted with manometer is designed for water...
This upright-slatted pressure vessel from IBO is designed for water supply systems...
This upright or horizontal pressure vessel from IBO is designed for domestic water...
This upright-low pressure vessel is suitable for domestic water supply systems,...
The horizontal pressure vessel AQUA OLA 100L is designed for potable water storage...
The AQUA OLA 100l vertical pressure vessel is designed for domestic water supply...
The AQUA OLA 150L vertical expansion tank with manometer is designed for domestic...
The AQUA OLA 200L vertical expansion tank serves as a water storage unit for...
The AQUA OLA 24L horizontal pressure vessel is designed for domestic water supply...
The AQUA OLA 50L horizontal pressure vessel is designed for domestic water supply...
The AQUA OLA 80L horizontal pressure vessel is designed for domestic water supply...
The AQUA OLA 80L standing expansion vessel is designed for potable water systems...
The stainless steel pressure vessel CH 180 L is intended for water supply systems...
Designed for potable water supply systems, the IVAR A032L38 pressure expansion...
This pressure expansion vessel is designed for potable water supply systems in...
This pressure expansion vessel is designed for water supply systems in residential...
This pressure expansion vessel is designed for potable water systems in commercial...
This pressure expansion vessel is designed for potable water supply systems. With...
This pressure expansion vessel is suitable for water supply systems in residential...
Designed for water supply systems in residential and commercial buildings, this...
This pressure expansion vessel is suitable for water supply systems in residential...
The AQUA OLA 50L standing expansion vessel is designed for domestic water systems,...
The Centrometal CH 140 L stainless steel pressure vessel is used in water supply...
This 300 L stainless steel pressure vessel is suitable for domestic water supply...
The Centrometal CH 90 L stainless steel pressure vessel is designed for use in...