My filter pressure was about 26 PSI and I finally had a day off so I decided to clean my cartridge filters. I gave them a 2 hour soak in TSP and rinsed them off. They looked pretty clean after the washing and they seem to be in good condition. After re-installing them my pressure dropped to 18 PSI.
I have a brand new The Pool Cleaner and a Pentair Rainbow Kreepy in line leaf trap that was sitting in my garage that I had planned to install after I cleaned my filter. I have a dedicated suction port and installed the cleaner the same day I cleaned the filters. The cleaner seemed to run okay the first day but it still needed to be dialed in so it would clean my entire pool and climb the walls.
The next day after running the cleaner about 2 hours I noticed it had stopped moving and my filter pressure was up to 28 PSI so I switched the valve back to the skimmer and main drain only. The pressure remained high at 28 PSI. I also noticed that there was air in the leaf canister.
Today I tried The Pool Cleaner again after removing the air from the leaf canister and I noticed my pressure was back down to 18 PSI. I switched the valve back to skimmer and drain to check the pressure and the pressure went back up to 28 PSI.
Has anyone experienced something like this? Do I need to clean the filters again and possible soak them in Acid?