Expansion vessel for Domestic Hot Water IBAIONDO 5L

Product detailed description

Expansion vessels are essential components in domestic hot water systems, particularly in systems with storage tanks or combination boilers. They accommodate the thermal expansion of water as it is heated, preventing excessive pressure build-up in the system. This vessel is commonly used in residential, commercial, and light industrial applications where a reliable and compact solution is required. Installers working on systems with closed-loop water heating or indirect heating systems will find this model suitable for integration into standard pipe layouts. The vessel’s design ensures compatibility with typical domestic plumbing systems, and its white powder-coated steel construction provides durability in environments where corrosion resistance is important.

The vessel is installed in the cold water supply line before the heating system, ensuring that thermal expansion is managed without affecting the integrity of the system. It is particularly suited for systems where space is limited, and where a compact, high-performance solution is required. The EPDM membrane ensures compatibility with potable water and provides a long service life under normal operating conditions.

Technical parameters

Type	Expansion vessel for domestic hot water
Volume	5 l
Max. working pressure	10 bar
Pre-charge pressure	3 bar
Operating temperature	-10°C to +100°C
Membrane	Fixed EPDM
Material	Steel with powder coating, wall thickness 1 mm
Colour	White
Connection	3/4 inch
Net weight	1.480 kg
Warranty	2 years
EAN	5900308748725
Code	NP.CWU.05.IB
Brand	Hydroland

The 5L capacity is suitable for systems with moderate thermal expansion requirements. The maximum working pressure of 10 bar ensures compatibility with standard domestic hot water systems, while the pre-charge pressure of 3 bar helps maintain stable operation. The operating temperature range of -10°C to +100°C allows the vessel to function effectively in both cold and hot water environments. The fixed EPDM membrane is resistant to degradation from thermal cycling and is suitable for potable water applications. The 3/4 inch connection is standard for domestic plumbing systems, ensuring ease of integration.

Installation and connection

The vessel is installed in the cold water supply line before the heating system. The 3/4 inch threaded connection allows for secure attachment using standard plumbing fittings. It is important to ensure that the vessel is installed in a location that is easily accessible for inspection and maintenance. The pre-charge pressure should be verified before installation using a pressure gauge connected to the valve included in the package. Common installation errors include incorrect orientation, failure to check the pre-charge pressure, and neglecting to isolate the vessel during system pressure testing. The vessel should be installed in a horizontal position to ensure proper operation of the internal membrane and to prevent air entrapment.

Compatibility and accessories

This expansion vessel is compatible with standard domestic hot water systems, including storage tanks and combination boilers. It is designed for use with potable water and should not be used with aggressive or chemically treated water without prior consultation with the manufacturer. The valve included in the package allows for pressure adjustment and inspection. No additional accessories are required for standard installations. Related products may include pressure relief valves, pressure gauges, and isolation valves, depending on the system configuration.

Technical background for designers

The vessel operates on the principle of separating the water volume from the compressed air chamber using a fixed EPDM membrane. As the water is heated, the membrane expands, allowing the vessel to absorb the increased volume without raising the system pressure. The steel body with 1 mm wall thickness provides structural integrity and resistance to mechanical stress. The powder-coated finish enhances corrosion resistance, making the vessel suitable for environments with high humidity or exposure to water. The operating temperature range ensures that the vessel can function in both cold and hot water systems. The service life is influenced by the frequency of thermal cycling, the quality of the water, and the maintenance of the pre-charge pressure.

Service and operation

The vessel requires minimal maintenance. The pre-charge pressure should be checked periodically using the included valve. If the pressure is found to be below the specified level, it should be adjusted using a suitable pump. No service intervals are specified in the brief, but it is recommended to inspect the vessel during routine system maintenance. The vessel should be isolated from the system before any inspection or maintenance work is performed. The white powder-coated surface should be cleaned with a mild detergent and water to remove dirt or debris. The vessel should be replaced if the membrane is found to be damaged or if the vessel shows signs of corrosion that could affect its structural integrity.

Frequently asked questions

Can the vessel be connected to a system with a working pressure higher than 10 bar?
No, the vessel is rated for a maximum working pressure of 10 bar. Exceeding this limit could result in damage to the vessel or failure of the membrane.

Is the vessel suitable for use with chemically treated water?
According to the manufacturer's technical data sheet, the vessel is suitable for potable water applications. For chemically treated water, it is recommended to consult the manufacturer for compatibility information.

Can the pre-charge pressure be adjusted after installation?
Yes, the pre-charge pressure can be adjusted using the valve included in the package. It is important to verify the pressure before and after installation to ensure proper operation.

Is the vessel suitable for outdoor installation?
According to the manufacturer's technical data sheet, the vessel is suitable for installation in environments with temperatures ranging from -10°C to +100°C. For outdoor installation, it is recommended to provide adequate protection from direct exposure to weather conditions.