I don't have a valve on the top, but there was a drain valve on the side. I opened it up and drained all the water out, then filled it back up out of the water hose, let water fill up the lines too till it was full. Turned the pump on and it seems to be working fine now. Not sure why that fixed it, or how long it will last lol. Thanks for the help, i will keep you posted if it happens again.