Your plumbing needs will not be the same as what your neighbour needs since all residential homes are not the same. When categorizing your plumbing needs, your plumbing contractor knows what plumbing is required for a hot tub, sinks, toilets, showers and so on. To help you understand which one you have, a qualified plumber can help.
Branch plumbing. This plumbing practice has a mixture of designs, however, they all share similarities with the pipes splitting and going into different ways as they give out hot and cold water. Branch plumbing is when one floor needs cold water and the other needs hot water at the same time, and the water will split off in different directions to accommodate the needs of the users. This kind of plumbing is most efficient in providing hot and cold fixtures but is most complicated for plumbers to repair.
In-series plumbing. This plumbing practice is often simple as the hot water will just come from a water heater and the cold water will be supplied from a ground supply. They can run alongside but they are mostly separate. Since this system is just simple, plumbers also find fixing this fixture much easier as they just need to eliminate the pipes that are fine.
To understand more about the plumbing system you have, you may consult qualified plumbers. They can help you with any of your plumbing needs.