How to unstop drain backup from washing machine?
My washer is ejecting the water ok but it backs up the dispensing pipes to overflow. I have snaked the pipes. I have put the water hose with a plumbing bladder on it into the pipe and run water for 10 min. with no backup. I have run the snake down the roof vents. And as soon as I hook the machine back up, the water again backs up. Help!