Drano Gel Max didn't work on my drain; its connected to the dishwasher and all the water is coming out of the dishwater, or backs up back into the kitchen sink, and it goes all out on the floor.

a tolit plunger

call a plumber. you have a back up in a main line and you cant fix it. and none of those things ever work.

See if you can Remove the P-trap and clear it that way. IF, it is not the P-trap clogged and further down the drain, you may have to use a small Rotor-Rooter it a flexible spring thing. Hardware stores sell them. They worth the money, because you may need it again, and, what it save in Plumber costs it Money well spent. Another thing you can try, but, you have to think. When the P-trap removed and the clog is further down, you can try a Garden Hose, poke the end in the Drain and SEAL around it with something and have someone turn on the water, sometimes the water pressure will force the clog to move to the next bigger drain. The water from the sink and dishwasher not have pressure to force the clog to move.

Have your drain systems "snaked", roto rooted. After this is done, once a week pour a cup of bleach down the drains and this will help keep them running freely.Gets rid of soap scum,grease, etc.

you need your drain cleand with a "roto-rooter" or a "snake"my advice is call a plumber. the fact that the water is backing up in your sink proves you have a sink stoppage. the fact that it is coming out of you dishwasher proves that the plumber who installed your dishwasher did not install it to code. if you live in the L.A. area, call me if not call a plumber to snake out your drain. Don't worry, this is a very common problemn and cheap and easy to fix.