Hi, I have been having a continuous problem with the tub backing up. I have used Draino a couple of times, but I've been told that I should not be doing this since the house is old (1920)... I did have a plumber come out once, but he said that the tub and bathroom was done kind of cheap when it was remodeled. The drain does not come out, and there is no overflow piece on the tub. I think he used an auger as best he could since the drain stopper does not come out and only lifts out maybe a half inch to an inch. Does anyone have any recommendations? I would greatly appreciate it. Can I continue to use a little bit of draino every 6-8 weeks?? Thanks!