I would have it done. It shouldn't be that high. Or you can rent a roto-rooter type set up from equipment rental people, in my case it was cheaper to have it done. If it is roots and you own the building, you might want to put in plastic sewer lines from he house to the main sewer.I unscrewed the clean out drain cap and the water drained from the sinks, I have a snake...should I try to snake the line from there?