I am attempting to blow out my pool lines for the 2nd year, last year was successful. I turn the muti-port valve to Recirculate. Whenever I blow air from one of the drain plugs in the pump, the air comes out of the backwash/waste line and does not make it to the returns.
The air seems to come out of this line on any setting other than filter. If I run water with the Recirculate option, it cycles right back to the pool.
I changed out my multi-port valve about a year ago.
Any help would be appreciated!