In this system there is a central column with two pipes. One pipe is for the supply of hot water and the other for the supply of the cold. These two pipes are connected with the collectors used for the distribution of hot and cold water and are haused inside a wall cabinet that exists in every bathroom and kitchen. From the collectors the distribution of cold and hot water is accomplished through a separate line for each hydraulic receptor. By this way, the water supply is more stable and is not particularly affected if there is a second supply open.
The main advantage of this system is that because the pipe has no branches and is all the way double (inside corrugated pipe) by using special angular fittings, it can be replaced (by sliding inside the corrugated pipe) in case of a problem without the slightest damage of the wall or floor. If there is a leak in the installation, we can turn off the corresponding valve from the collector in order the rest of the installation to work. The only disadvantage of the system concerns the increased cost of installation, as more pipe meters are needed.
In this system there are no collectors for the distribution of hot and cold water. Two pipes are running down the perimeter of the bathroom and by branching they supply hot and cold water to any hydraulic receptor. The advantage of this system is that not many meters of the pipe are required for the installation, while its disadvantages are all the advantages of the radial system.