So lately when I do my WC and i restart my system, the tank nearly overflows before the water starts draining back to the sump. I'm running a standard Durso overflow. I have pulled the pipe and cleaned it, but it hasn't seemed to help. Any suggestions as to why it has started doing this? I am going to pull the flex hose under the tank on my next WC and see if it is blocked or something. I may take the time to put in the hard lines, but that will all depend on timing...
