How Many Hours A Day Should I Run My Pool Filter?

If you have a swimming pool at your house, it is most likely you encountered your pool filter. Swimming pool water clarity is a combination of maintaining chemical balance and filtration of your pool. They are both needed to make sure that you are getting the safest and freshest water available.

How many hours a day should I run my pool filter? It will always depend on the size of your pool as well as the hydraulics. Residential pools are built to run 8 hours a day for a proper turnover rate with a temperature of 80 degrees. Every 10 degrees warmer it should run an hour longer.

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In this short read, you will have a better understanding of how long you should be running your pool filter.

How Your Filter System Works

In general terms, your pump pulls the pool water from the skimmers on the pool wall and the main drain on the bottom of the pool. The water will then flows through the pump to the filter.

This phase removes the dirt, debris, and other contaminants. After the water is filtered, it will then flows through the plumbing to the heater and then the salt chlorine generator if you have a saltwater pool. After that, the clean water returns back to the pool through the return jets on the pool wall.

How Long The Filter Should Be Run

When it comes to running the filter, it will depend on the size poo to filter the ratio. If you happen to have a small filter, you may need to run it more. It will also depend on how many gallons the filter can accommodate and process at a given time.

You might want to switch on your filter daily, so all the water in the pool is run through the filter at least once. To accomplish this, you need to factor how much water is currently in your pool and the size of your filter. Just be mindful that most pools are sized with filters that run the water for over 8 to 10 hours.

For sand filters, the turn over is approximately 2400 gallons per hour. It is recommended to turn over the water in your swimming pool at least one to two times a day. Run your filter more time during hot weather or heavy bather load and as a general rule, turn your sand filter on 1 hour per 10° F.


As a conclusion, running pool filter is not supposed to be 24/7. If you decide to run your pool filter, make sure to run it overnight. It means that you can keep your energy costs low by avoiding premium use times. When it comes to how long, there is no one size fits all answer.

There are many things things that you have to consider, and ultimately you only need to find the right timing for your pool and your equipment.

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