Swimming pools can provide lots of fun for your family during hot, summer days, but they require quite some effort to maintain. Here is some helpful information to consider if you want your pool to remain as new as the day you installed it. The Importance of Having a Pool Pump A pool pump is the core of the circulation system in any swimming pool. Its primary job is to pull water from the main drain and replace it by pushing fresh water into the heater, filter and any other designated areas.