Help! We moved into an old house, our plumbing vent is about 4 ft. from basement floor. Every time we use kitchen sink or bathtub, it backs up into vent pipe. Also, our sump pump backs up into vent. We have tried to snake it and also poured drain cleaner down every drain. I know the vent should be out of roof, but we have a 2 story house with attic. We rent this house. Is there a cheap and easy way to reroute vent or fix it so water doesn't keep backing up. It floods one corner of our basement and smells BAD!!