Expansion Vessel (Open Horizontal) Kaps C413501020 — 20 L capacity for central heating systems

The Kaps Expansion Vessel C413501020 is an open horizontal tank with a 20 L capacity designed for central heating and hot water circulation systems. Its open horizontal configuration allows installation in boiler rooms and plant rooms where atmospheric venting is acceptable. The vessel accommodates thermal expansion, helps maintain stable system pressure and supports the safe operation of boilers, pumps and piping in residential and light commercial heating installations.

Advantages

The open horizontal design provides straightforward installation and access in confined boiler-room spaces while permitting visible water level and air interface control. With a 20 litre working volume, the vessel limits pressure fluctuations caused by thermal expansion and reduces stress on system components. Constructed for compatibility with typical central heating layouts, it is suitable for systems that use an open expansion arrangement and require reliable expansion capacity without integrated pressurisation elements.

Suitable for

• Domestic central heating systems with open expansion circuits
• Hot water circulation systems in small commercial or utility plant rooms
• Boiler room installations where horizontal mounting and atmospheric venting are provided

Key specifications

• Type: open horizontal expansion vessel
• Nominal capacity: 20 litres
• Orientation: horizontal
• Application: central heating and hot water circulation systems
• Installation location: boiler room / plant room mounting

How to use

Install the expansion vessel in a boiler room or plant room at a level and position that allows correct hydraulic connection to the system’s feed and return piping and provides access for inspection and venting. Connect the vessel to the system in accordance with local codes and the boiler manufacturer’s instructions, ensuring proper venting to atmosphere for the open arrangement. Commission the system by filling, venting trapped air and checking that the vessel accommodates thermal expansion without causing undesired pressure rises. Periodic inspection of the vessel, venting points and connections is recommended to confirm correct operation.

Usage recommendations

Use this open horizontal expansion vessel where the heating installation design specifies an open expansion arrangement and atmospheric venting. Ensure the installation complies with applicable local regulations and safety guidelines, and verify compatibility with the heating system layout before fitting.