A plumbing repair begins with a very simple concept. The concept is that the homeowner knows exactly what he is doing and has the proper tools to do it.
Doing a major plumbing job without this type of knowledge or equipment can be a disaster.
For example, let's say that you were about to fix a broken water pipe. You fix the broken water pipe and then decide to treat yourself to a nice dinner at a fancy restaurant.
While you are at the restaurant the water pipe breaks because it was not fixed properly and causes serious damage to the rest of your home.