Hello, I have a Hayward filter model number C3025. It's an older filter. It is running at 30 and it is usually at 20. We cleaned the filters. I bought a new air relief hose and am going to put that in. The one inside is really short maybe 12 inches. I wonder if it broke off. Even after I manually bleed the valve it is staying at 30 . Any ideas? We have had a lot of wind storms and sand in the pool but the filters are clean. I'm worried it might explode. Is there a filter at the bottom of the hose? There is suction in the skimmer and the vacumn is working properly. Is 30 too high for an old filter ?