Central heating expansion vessel HS 25L, 3/4 inch connection

Central heating expansion vessels HS 25L absorb water volume fluctuations in a closed central heating system, maintaining constant pressure and helping to reduce energy consumption. A wide range of available expansion vessels meets the requirements of various heating systems and sizes. In a closed central heating system, water cannot be compressed, and any increase in water volume due to a temperature rise is absorbed by the expansion vessel. When the water is cold, the tank pre-charge pressure presses against the membrane. As the temperature rises, the increasing volume of water pushes against the membrane and water flows into the tank, providing extra space for the system. As the temperature drops, the air cushions the forces and the water returns back to the system. This allows the system to maintain pressure, helping to reduce energy consumption by the central heating system.