Many homes have a direct system of pipes or ducts indirectly. Piping systems are not directly in most households where the head cold increased feed water tank and taps. Wells located on the roof or attic, and all other tools get their water from here.

In an indirect system, the system is used when the boiler is required to supply both domestic water supply and central heating systems. The main series of circular tube heater heats the water to the bottle and the system of central heating radiators form. The main circuit has a feed and expansion tank. The second circuit, fed by cold water as well, which supplies hot water tap in the house.

The house can also have a direct pipeline system in which all cold taps are fed from a large increase. It is cheaper and simpler than the indirect system, but there are also drawbacks. High pressure in all lines can cause excessive noise and no risk of contamination. Some local authorities do not allow a direct system of pipes. Direct systems are cheaper and easier to install than the indirect, but not suitable for hard water areas or to connect to a central heating system.