Ok, so I know it's bad to admit, but I never wrote down the initial filter pressure last year when our pool was installed. I did take note of it this year when we opened - @18 - and it seemed high to me. But everything has been working just fine. I've had new cartridges on my list for a while but other things keep eating my budget's wiggle room lately.
My question is this: we have a SwimPro Voyager series cartridge filter. We are having people over this afternoon so I went out this morning to vacuum and do all my usual testing and prep. I noticed the filter was running a little over 20psi and, honestly, couldn't remember the last time I cleaned it or anything. So I popped it open, cleaned everything out really good. However, when I put everything back together, the filter psi hadn't changed. Also, I noticed that the gauge, that usually sits flush with the top of the casing, had popped up a little. I unscrewed it, emptied the water, and refit the gasket-thingy that's around it, and put it back int, screwing it nice and tight and it sat flush again. I'm hoping that I didn't mess something up by doing that. Do I just need a new filter cartridge? Or could there be something in the lines? And is resetting that gauge in the casing going to hurt anything?
More importantly, is a psi rating in the 20's going to hurt anything?