Expansion Vessel for Domestic Hot Water CIMM ACS 02 L, 2 L Capacity

The Expansion Vessel for Domestic Hot Water CIMM ACS 02 L is a 2-litre membrane (bladder) tank designed for use on hot water lines in residential and small commercial domestic hot water (DHW) installations. It compensates for thermal expansion in closed hot water circuits, reducing pressure spikes and helping to protect valves, fittings and pipework from stress caused by fluctuating temperature and volume. The vessel is intended to be mounted on the hot water line where it can stabilize operating pressure and extend the service life of system components.

Advantages

The CIMM ACS 02 L features a flexible internal membrane that separates the water from the pre-charged air cushion, ensuring consistent pressure absorption and reducing water hammer. Its compact 2-litre capacity and cylindrical form factor allow for installation in limited spaces close to water heaters, boilers or distribution manifolds. The vessel reduces the frequency of safety valve activations and minimizes pressure fluctuations, contributing to more reliable operation and lower maintenance needs for DHW systems.

Suitable for

• Residential hot water systems and apartments
• Small commercial DHW installations such as offices or shops
• Installation on delivery lines of water heaters and boilers
• Systems requiring protection of fittings and pressure stabilization

Key specifications

• Type: Membrane (bladder) expansion vessel for domestic hot water
• Nominal capacity: 2 litres
• Application: Closed hot water/DHW systems
• Function: Compensates thermal expansion and stabilizes pressure
• Mounting: Inline installation on hot water delivery lines (wall or pipe-mounted depending on brackets)
• Material: Steel body with internal rubber membrane

How to use

Install the expansion vessel on the hot water line downstream of the heat source in accordance with local plumbing codes and manufacturer instructions. Before final connection, check and set the pre-charge air pressure of the vessel to match the static system pressure; this ensures optimal operation. Securely fasten the vessel using appropriate brackets or supports to avoid mechanical stress on pipe connections. Periodically inspect the vessel and verify pre-charge pressure and membrane condition during routine maintenance to ensure continued performance.

Usage recommendations

Verify compatibility with system operating pressure and water temperature ranges before installation. If in doubt, consult a qualified plumber or technician to determine correct pre-charge pressure and mounting location. Regular inspection of the vessel and adjustment of the pre-charge air pressure will help maintain stable DHW system pressure and extend component life.