:confused: Our basement drain and air conditioner drain along with the upper level kitchen sink drain apparently meet under the basement floor before going on to the main drain. All 3 must be connected as we can put water in any of them and it comes up in the basement drain. We have been unable to get a "snake" far enough through to hit the main drain as it stops before then. The rest of the house drains work super! Is there a trick to getting a "snake" through a trap and on down line? I'd try about anything before we call a plumber! The water is standing up to the top of the floor drain. We've tried Liquid Plummer and so far no good! Thanks for any help you can give us.