My pump pressure is fine if I have it set to circulate but if I turn it to filter my pressure rises to 20. I put new sand in it this year thinking that was the problem, it didn't help. It's a crystal flo 2 filter.
Pump pressure
- Thread starter BarbiAnn68
- Start date
Any valves turned to limit how water is returning to the pool? When I have my Polaris on a return my pressure reads higher than when nothing is in the return.
Just another check-when you turn your pump off the guage goes down to zero....right? That will rule out a defective guage.
Its unfortunate you changed the sand, many times all it needs is a good deep cleaning.
Just another check-when you turn your pump off the guage goes down to zero....right? That will rule out a defective guage.
Its unfortunate you changed the sand, many times all it needs is a good deep cleaning.
All the valves are open and yes gauge goes to zero when pump is off. I am at my wit's end over this.
BarbiAnn - Pressure of 20 is not a problem. Do you still have good flow out of your returns back into the pool? Are you seeing any downside with the pressure? What is driving your concern to lower it? Every pool is different, mine runs at twenty pretty consistently. Please fill out your signature with all your pool's details including size of pool and pump. That info will help everyone's outlook on your situation.
My post above has the signature. When using the site mobile it doesn't carry over.
My normal PSI is 15. At 25 PSI the returns lose all their pressure and the skimmers stop taking in water.
My normal PSI is 15. At 25 PSI the returns lose all their pressure and the skimmers stop taking in water.
Lynzizzle - my post was to BarbiAnn the OP (original poster). If you are having concerns please start your own thread rather than hijack another's 
. It's no problem, we just want to make sure that BarbiAnn gets the help she's requesting. As for your setup, if your clean pressure is 15 then you should be backwashing your filter when your pressure climbs to 19 psi. That is the recommended 25% increase over clean pressure. When your filter gets too dirty, the water simply can not make it through your filter effectively and your pressure maxes out around that 25 psi.
I hope this helps and if you have any other questions we can start a new thread or a moderator can split this one off. Good luck!
. It's no problem, we just want to make sure that BarbiAnn gets the help she's requesting. As for your setup, if your clean pressure is 15 then you should be backwashing your filter when your pressure climbs to 19 psi. That is the recommended 25% increase over clean pressure. When your filter gets too dirty, the water simply can not make it through your filter effectively and your pressure maxes out around that 25 psi. I hope this helps and if you have any other questions we can start a new thread or a moderator can split this one off. Good luck!
When the pressure is at 20 my return flow is very weak, once I back wash the pressure goes down and return flow back into pool is good for about 15 mins then pressure rises again. I h as very a 21st pool with a crystal flo 2 filter, I think the pump is the star- rite. Circulate works fine. Thanks for any help.
Barbi - What is your clean pressure right after you backwash? It is unusual for a sand filter pressure to rise that fast again, even if the pool is really cloudy. Are you backwashing long enough? Are you rinsing for at least 30 seconds after backwashing before returning to filtering? You should backwash once your clean pressure raises 25%, which is likely mush less than 20 psi since your flow falls dramatically there.
Lynn - I know you weren't and definitely no problem at all. I hope I didn't come across as rude
Lynn - I know you weren't and definitely no problem at all. I hope I didn't come across as rude
Regular pressure is between 10 and 15, back washing for about 2 minutes and no not running rinse.
I would target backwash then at a pressure no higher than 18psi then. If you start to see diminishing returns at pressures lower than that then I would lean to 10 as starting pressure and backwash at 10. Rinsing is a critical step to help settle the sand after backwashing. It may help distribute the sand evenly giving you more surface area to filter with lengthening the time between backwashes.
If you are feeling up to it, deep cleaning your sand may help a lot. It's pretty easy provided you can get your multiport valve off. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwib_brNv4fNAhVGQyYKHZnFDlYQFggdMAA&url=http%3A%2F%2Fwww.troublefreepool.com%2Fthreads%2F73192-Deep-Cleaning-a-Sand-Filter&usg=AFQjCNHTgwe6_ggycBORjVBhFfmsfVbT_w
If you are feeling up to it, deep cleaning your sand may help a lot. It's pretty easy provided you can get your multiport valve off. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwib_brNv4fNAhVGQyYKHZnFDlYQFggdMAA&url=http%3A%2F%2Fwww.troublefreepool.com%2Fthreads%2F73192-Deep-Cleaning-a-Sand-Filter&usg=AFQjCNHTgwe6_ggycBORjVBhFfmsfVbT_w
I just completely changed the sand on Sunday hoping that would fix the problem but it didnt. Backwashing is not a problem, the problem is I would have to do it ALL day to keep pressure down.
Oh yeah sorry, i forgot you replaced your sand already. How does your water look? You should really not have to backwash that often. Please post a full set of numbers just to start eliminating issues and update your signature with your pool and equipment specifications. Thanks.
Ok, I think I got my signature update and found book that came with my pool. It says normal pressure should be between 13- 19 psi, so I guess it's normal but output to pool diminish's after 15 minutes.
- May 3, 2007
- 16,819
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
If flow is good right after backwashing and then it decreases after a short period of time, most likely you are filtering out something and usually it is algae. Post a full set of test results and also perform a OCLT (see pool school).
Ok, I will buy the testing kit this weekend and post the results.
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