High Pressure after cleaning filter manually

  • Last Post 09 June 2019
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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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



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.