Question about Hayward SAND FILTER, PRO SERIES

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Hayward Swimpro Sand filter shuts off after approx 2 minutes

I recently opened my pool (24ft round above ground). After adding the chemicals from the starter kit, I ran the filtration system for 24 hrs. I shut off the pump. The next day when I went to tunr the pump on again it shut off within 2 minutes. The switch remained in the on position so I turn it off and back on. Within 2 minutes it shut off. I had someone turn the switch on again and I checked to see if water was being returned to the pool (yes). I am not sure if the pressure guage is working because it sits at 20 when off and goes to about 40 when full filtration occurs. The circuit breaker never trips during the shut off. So I looked at the motor which seems to be shutting off to protect itself.
I tried to backwash to see if something was clogged but it shuts off. The water that came out looked clean. I opened the top of the sand filter and did not notice anything strange. The pool & filter system is 3-4 yrs old and has the original sand. What could be the problem or what should my next step be?

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It sounds like the pump is either overheating or the thermal protection switch that senses the overheating situation is defective. If nothing else changed like running on an extension cord, etc, a small motor repair shop can get you back up and running fairly inexpensively.

Posted on Apr 22, 2010


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Hayward s-180T sand filter works with what size above ground pool?? I have a 28" round will it work on that?

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Thank you for posting your question here on

32' round by how deep? Flow rate is how you size a filter so with total gallons you can calculate how many per minute will add up to the whole pool being turned over is 6-8 hours. The pump and filter are then sized for that required flow...Assuming the pool is an above ground ~4' average depth then total gallons would be about 24,000 gallons. For an 8 hour turnover you would need about 50 gallons per minute. The 210T, T for top mount, is designed to handle up to 44 gallons per minute and turn over a 21,000 gallon pool in 8 hours or a 26,000 gallon pool in 10.

What that basically means is that using a 210 on a pool 32 x 4 would be pushing it. It will work but you will end up backwashing more frequently which raises the overall cost of running the pool. If it is not to late a 24" filter would be better; especially if you have periods of time in your pool season where heavy amounts of debris such as pollen get into the water. A 21" filter won't handle any over a normal filtration load.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at Positive feedback is appreciated once your problem is solved!

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1 Answer

We have a hayward sand filter for our 24ft round above ground pool. We changed the sand this season and replaced the 8 fingers @ the bottom of the filter tube. After doing so and turning the pump on it...

its more likley to be too much sand in it and its just cloged up,,,take the sand out and run the pump out of the pool in a big tub of water to flush it out and also to back flush it,,,if its working ok after that fill it up with the right type of sand but only a little at a time,,,,
i dont think the phosphates are a problem its not being filterd thats the problem this needs sorting out fast or the pool will fill up with algy and green slim

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The SW256T was a marathon group exclusive. It is not standard to the Hayward catalog. You are not going to be able to go into most dealers and ask for parts for a 256 and find it. The good thing is with the exeception of the tank( which should be greenish in color) All the parts used on the filter are in the hayward catalog and are used in other filters they sell.
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