I just purchased a new home with a pool. Roughly 10-12 years old, but had it inspected at time of purchase by reputable company and even hired a company to come out and walk me through all the equipment.
It has a DE filter and the psi was starting to get a little high so tonight I took it apart, cleaned all the filters, put everything back together, primed the pump with water, lubed the gaskets and fired it back up.
The psi is back down around 15 right where they told me it should be, but now periodically the pressure drops way down and it sounds as though there is air in the line. I also noticed that when this occurs the skimmers almost drains itself for a short period then the suction backs off.
I opened the air valve on the filter until water came out as I was also told but it just seems like there is air in the lines and I don't know if this is common after taking apart the filter like that and it may work itself out or if this is a symptom of a larger problem. I never had any other issues with it until I cleaned the filter.
Any advice would be greatly appreciated from a newbie pool owner.