2″ drain lines clog up all the time but should never get to this extent. Drain lines need to be cleaned up and that all to it. Professional drain snakes need to be ran though drain lines to open up the circumference of the pipe. Make sure you know who to hire when you undergoing your next sewer drain back-up.
Ken’s Sewer Service has been around since 1974 and will unclog or repair your drain lines. Laundry lines typically get cleaned out yearly due to lint, food and grease build-up.