My old pressure gauge had water in it because the pool guy left it out over the winter in the filter lid. The pressure gauge would show 10-12 as normal pressure with backwashing above 12.
This year I decided to take care of the pool myself and after opening it, the pool was green. I finally got it clear and clean. I also replaced the pressure gauge a couple of weeks later and it is showing 15-18. Would you take the filter apart and clean it or make that my new normal pressure?
Also, I threw the old pressure gauge away and was not thinking that I can use it when the pool gets closed. Where do I find the plug that goes on top of the filter lid when closing the pool?