C.W.U. 24 BASIC diaphragm expansion vessel – expansion vessel for domestic hot water systems
The IBO C.W.U. 24 BASIC diaphragm expansion vessel is a 24 L expansion vessel designed for domestic hot water systems. It absorbs the thermal expansion of water and stabilizes system pressure, reducing fluctuations and how often the water heater or pump switches on. It contains a replaceable butyl diaphragm designed for contact with domestic water and elevated temperatures.
Who it’s for
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Water and domestic hot water system installers – The 3/4" connection, butyl diaphragm, and vertical or horizontal installation make it easy to fit into domestic hot water systems.
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Households with a water heater or boiler – The vessel absorbs the increase in hot water volume, reducing pressure fluctuations in the system.
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Domestic water pressure systems – The 3.5 bar pre-charge pressure is suited to systems operating at higher pressures.
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Technical servicing – The replaceable butyl diaphragm, resistant to elevated temperatures, lets you restore the vessel’s performance without replacing the entire unit.
Applications
The C.W.U. 24 BASIC diaphragm expansion vessel absorbs the thermal expansion of water in domestic hot water systems, maintaining stable pressure and reducing fluctuations while water is being heated and drawn.
Suitable for domestic and commercial domestic hot water systems, as well as domestic water pressure systems. The butyl diaphragm is suitable for contact with domestic water. The C.W.U. 24 BASIC expansion vessel can be installed vertically or horizontally.
Features of the C.W.U. 24 BASIC Expansion Vessel – Description and Technical Specifications
The vessel body is made of steel with an external protective coating that increases corrosion resistance. Inside the steel shell is a replaceable butyl diaphragm designed for contact with potable water and resistant to the elevated temperatures of hot water. The diaphragm separates the water from the compressed gas cushion, limiting its contact with the inside of the vessel body.
The vessel is supplied with a factory pre-charge pressure of 3.5 bar ±10%, which can be adjusted to suit the specific system. It is compatible with domestic hot water systems with a maximum operating pressure of 10 bar.
- Type: diaphragm expansion vessel for domestic hot water
- Brand: IBO
- Capacity: 24 l
- Diaphragm: replaceable, butyl
- Pre-charge pressure: 3.5 bar ±10%
- Max. operating pressure: 10 bar
- Max. test pressure: 15 bar
- Connection: 3/4"
- Operating temperature: 0–99°C
- Installation position: vertical or horizontal
- Dimensions (Ø × height): Ø27 × 46 cm
- Weight: 4.2 kg
IBO – 24-month (2-year) manufacturer’s warranty. Warranty and post-warranty service is provided by Dambat.
Dambat – a trusted manufacturer of pumps and hydrotechnical equipment with quality certificates.
Frequently asked questions (FAQ) – 24 BASIC domestic hot water expansion vessel
What is the 24 BASIC domestic hot water expansion vessel used for?
The IBO 24 BASIC domestic hot water expansion vessel accommodates the thermal expansion of water in a domestic hot water system and stabilizes the pressure. This helps limit pressure fluctuations and reduce how often the water heater or pump in the system switches on.
What is the difference between the BASIC domestic hot water expansion vessel and the CO BASIC version?
The BASIC domestic hot water expansion vessel is designed for domestic hot water systems and has a butyl diaphragm suitable for contact with potable water. The CO BASIC version has an EPDM diaphragm and is designed for closed central heating systems. The two series should not be used interchangeably.
What is the vessel’s pre-charge pressure, and can it be changed?
The factory pre-charge pressure is 3.5 bar ±10%. It can be adjusted to match the system pressure by adding or releasing gas through the valve on the vessel connection, with the system isolated and depressurized.
How do I install the 24 BASIC domestic hot water expansion vessel?
The vessel can be installed vertically or horizontally, with a 3/4" connection, in a domestic hot water system. An isolation valve is recommended to allow servicing without draining the entire system. Check the pre-charge pressure before startup.
Where can I buy the 24 BASIC domestic hot water expansion vessel?
The manufacturer does not sell directly. The 24 BASIC domestic hot water expansion vessel is available from commercial partners, plumbing wholesalers, and authorized online distributors.
What warranty does the 24 BASIC domestic hot water expansion vessel have?
The IBO 24 BASIC domestic hot water expansion vessel is covered by a 24-month (2-year) manufacturer’s warranty. Warranty and post-warranty service is provided by Dambat.
