Hi my name is Michael and I am having a major issue with the sewer pipes in my house. The problem began this summer when the tub began to drain slowly. Although my house is in Milwaukee WI, it has no basement and is built on a slab. I tried chemicals, but didn't have any luck. Then I tried a 25ft hand snake through the toilet (took toilet off), and that seemed to do a little. I finally took the time to try and fix the issue 2 weeks ago. I rented a 3/4 inch snake and fed 100 ft through the toilet with a 2 inch cutter. I then fed 100 feet through the clean out located at the front of the house. The sake seemed to remove a lot of blockage in both locations and a ton of tree roots when I fed it through the clean out. The only problem is that now the problem is worse than ever. Pooring water down any drain in the house with cause a back-up through the tub and toilet. It will not back-up through the cleanout at the front of the house (I've let a hose run in the cleanout and it seems clear to the street)? The blockage seems to be under the house. How could this be if I fed 100 ft of snake through the toilet? I inspected the vents and they seemed clear. Just to make sure I poured water down the roof vent, and sure enough it backed up through the tub. Water does still drain, just really slowly (maybe 10 gallons per hour). I'm frustrated and concerned. I could call a plumber but what would they do that I have not done? Please help.