When choosing a place for the well, it should be remembered that underground sources do not pass at the same level. In some places they are closer to the surface, in some further. The depth of the well depends on this. If you miss only a meter, then your well will go deep underground, but there will be little water supply, and if you get there for sure, you can only be enough to get to the water. And this is primarily saving on rings and work. Therefore, if you yourself do not know how to look for water, trust this specialists.