This piece of equipment is what drives the pool water through your system.

Fortunately, it doesn't require much maintenance by the pool owner. Just make sure the pump's strainer basket is free of debris and that the lid is tightly secured. A leaky pump lid can allow air into your system.

Check the O-ring periodically and make sure it is properly lubricated so that it makes a tight seal.

Also, look for leaks around the pump just to make sure it's working properly.