Now, how does a basement sump pump work? As we explained above, it is equipped with valves. These valves detect increased water level or water pressure. Thus, when there are heavy rains in your area and the water table begins to rise, the sump pump detects this and starts running.
How do you know if your sump pump is working? First of all, you see the results – a dry basement. But you can always listen to it in operation since it is equipped with a motor. Even a submerged sump pump (the most silent model) can be heard when it is working if you go to the basement.