How your pool works

A standard pool filtration system is very simple: Suction is created from the pump motor when turned on. This draws dirty water from the main drain at the bottom of the pool and the skimmer port, which is the square hole near the top of your pool.

The dirty water is pulled through underground pipes to the pump, into the filter, and the clean water is then redistributed into the pool, typically through water ports (jets) in the walls of the pool. A timer turns the pump on for a specified amount of time every day (an hour for every ten degree of water temperature) and continually circulates the water during this period. In order for the filtration system to work at maximum efficiency, it is important that the filter is clean, free of dirt and debris, and cleaned at least once a month.

Two of the most common filtration systems are:

Single Line Suction System has a pipe that runs from the skimmer, connects with the main drain pipe, goes directly into the pump and filter, and then back into the pool.

Multi-port Suction System has individual pipes running from the main drain and skimmer. These interconnect just before they reach the pump and typically have a valve that can be adjusted. This valve allows you to manipulate the force of suction from the skimmer or main drain. Some pools have a side port with an individual valve adjustment, which an automated floor vacuum can be attached. The side port pipe that leads to the pump is separate from the main drain and skimmer pipes.