Well, what's a well? Basically, to obtain water found in an aquifer, a well is a hole drilled into the earth. To pull water from the soil, a pipe and a pump are used and a screen filters out un Wells are drilled into the rock as deep as 1,000 feet to enter the water. ... Through a well pump, water flows through this casing. Above level, the well structure is closed off. From a pipe connected between the casing and a pressure tank (generally located in the basement of your house), the water then reaches your home.