Water in basements may also be caused by a drain tile issue. Drain tiled basements have a pipe that is continuous around the entire perimeter of the foundation. This 4” pipe has holes that will gather ground water before it gets to the basement floor. These pipes dump water into the sump pump, which is then pumped outside.
If you see two 4” pipes coming thru the side of the sump pump basket, the basement is drain tiled. If there are no pipes, the basement is not drain tiled and could face even more moisture problems. Often times if there is an issue with the drain tile you will have moisture evidence at or near the floor of your basement. This is something that should be investigated further with a drain tile test. The purpose of a drain tile test is to determine whether drain tile replacement is needed and if so, how much drain tile needs replacing.