# Thread: when and how long to run the pump each day?

1. ## when and how long to run the pump each day?

Last year when our pool was installed we ran the pump 12 hours a day. It was a very hot summer here. Now it is in the 70's and supposed to go back to the sixties next week. I'm wondering how long and when we should run the pump, (hottest time of the day? morning? evening? Should we increase amount of time once weather heats up?

2. ## Re: when and how long to run the pump each day?

One good rule of thumb is to run the pump one hour a day less for every 10 degrees colder the water is. Of course that is not exact, but it is a good starting point.

3. ## Re: when and how long to run the pump each day?

So if the water is 70 degrees run it 6 hours a day? Should that be split into 3 hours a.m. and 3 pm or during the hottest part of the day?

4. ## Re: when and how long to run the pump each day?

There are no definite answers. It's really a "whatever works for you" thing.

If you have a lot of pollen or other tree debris, you may need to run it more to keep the skimmer working. Cleaners, heaters, chlorinators, the weather and the environment around the pool all have an effect on how much you need to run the pump. If it's sunny and you want the pool to warm, run during the hottest part of the day. If you want the pool to cool, run it at night.

The only requirement is to run the pump whenever you have swimmers in the pool unless you have a small pool that doesn't have a pump that is UL or otherwise certified for swimming pool use.

5. ## Re: when and how long to run the pump each day?

I'm across the border from you in PA. We run our pump 6 hours during the night when the rates are 50%, and we run it for an hour after the dogs have been in the pool to skim the hair off the surface. You can split the time but you need to get one full circulation of the volume. I have no idea how to calculate that which is why I run the pump 6 hours. Just a wild guess on my part.

6. ## Re: when and how long to run the pump each day?

Anna, where in PA are you? I'm from Bucks County. We are lucky that there are no trees near the pool and other than the occasional bug the pool stays very clean. We do not have a heater either.

7. ## Re: when and how long to run the pump each day?

Melissa, I'm in the northern Lehigh Valley, Northampton County. Want to get together some time?

8. ## Re: when and how long to run the pump each day?

So I thought we had to run our pumps in the daytime in the sunlight hours during warm weather season. Is this not true?

9. ## Re: when and how long to run the pump each day?

Originally Posted by RobbieH
So I thought we had to run our pumps in the daytime in the sunlight hours during warm weather season. Is this not true?
Correct, not true.

Mine runs in dark half the time & 9am-12pm the other half.
Early seaon (like now) & late season when it is cooler, it runs one 6 hr period in the darkness
Hotter part of the season is 7 hrs.
All this can vary a bit
When a cleaner is on, the filter pressure drops so less filtering is happening so careful then- may need a bit more time to filter

10. ## Re: when and how long to run the pump each day?

There are many reasons to run the pump at different times of day, and none of them are important enough to consistently over-rule the other. In other words, running only at night is totally fine as long as there is some reason to do so (like lower electrical rates). Spreading the pump run time out around the clock helps, ie have the pump on for more than one period, perhaps morning and evening, or day and middle of the night, has minor advantages.

11. ## Re: when and how long to run the pump each day?

Should it be added that you should run the pump when people are in it?

12. ## Re: when and how long to run the pump each day?

Most people prefer to have the pump running when they are swimming, but it is not essential. In some low end above ground pools it is actually important to have the pump off when people are in the pool for electrical safety.

13. ## Re: when and how long to run the pump each day?

Does anyone know if it shortens the life of the pump having it turn on and off a few times a day as opposed to having it run 24/7?

14. ## Re: when and how long to run the pump each day?

flyboy320, while it might make some very small statistical difference, it isn't anything worth worrying about.

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