High Pressure after cleaning filter manually

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Butter posted this 30 June 2017

I cant figure this out. After backwashing my DE-4800 filter several times, my system starts at 12-15psi with great flow for a couple hours. then creeps back up to 25 or higher and eventually flow slows to a crawls. I then tried manually cleaning the fliters and starting the system again. Same thing, started at 12 psi with GREAT flow for 2 hours. I let it run over night.. and after 6 hours psi jumped back up to 25 psi and flow has slowed again. 

I notice when I look inside the pump skimmer when I start it with great flow the pump is full of water.. but as the but after a few hours it look like it get about half full.. I am beyond frustrated..

Before I go and buy a new filter grid to see if that help, I thought I would see if anyone has any suggestions. Thanks!

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Palin123456 posted this 3 weeks ago

I have same issue, I also tried new de filter grids without any success. Did any one found solution?

BobbiW posted this 26 August 2019

I have a similar problem but I dont have a cartridge filter. I have a brand new DE filter that runs fine for the first however long and then slowly the pressure on the filter goes up and you start to see air bubbles in the pump. I have replaced the gaskets, as I have been told there may be a air leak before the pump. This is just super weird this is happening all after I just purchased a new filter. Any suggestions?

Golfnmike posted this 09 June 2019

I have the exact same problem. I replaced all the filter grids. However, I ran the filter WITHOUT the grid installed and it functioned perfectly, no pressure build up and the flow was great. Once I reinstalled the brand new and clean filter grid, the same thing happened, high pressure builds and the flows nearly completely stops. 

Service posted this 05 July 2017

Hi Butter,   We have dicussed this issue with a couple of the manf service reps and based on those discussions offered this explanation to several customers in response to Comments. Comments aren't set up for feedback so I haven't got anything back for customers that may have tried this.    One possible cause of a gradual reduction in water flow is a buildup of air pressure in the top of the filter tank If you have a closed system, air cannot enter into the tank, just water. But if you have a suction leak at or before the pump. air will get sucked into the system and be collected at the top of the filter tank.Over a short time, this air will cause a substantial buildup in backpressure which will impede the flow of water through the filter. When you do a Backwash, your will release this pressure. Returning to "Filter" will restart the air buildup cycle,   One indication that you have a backpressure comes when you turn off the pump. If you have a strong surge of water shooting back through the pump and out the skimmer, it's the immediate release of this backpressure. Some customers have seen a column of water blow the skimmer cover off after shutting off the pump.   The solution to this problem is to isolate and correct the suction air leak. Here is a Guide on On How to Insolate and Correct Suction Leaks which you may find helpful.

Thank You

Patrick

www.inyopools.com

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