Abstract: A combination in a mixture, solution, emulsion, or other ways of combining the different elements that make up the combination, to prevent odors in sewer lines from entering various types buildings, trailers, motor homes, manufactured homes, and the like which have plumbing fixtures therein with a connection to be made to a sewer line to conduct refuse from the plumbing fixture or fixtures to the sewer line. Sewer lines are breeding grounds and conduits for odors, and unprotected plumbing fixtures connected to sewer lines can be the entry points of such odors, particularly when the fixtures are left idle for many weeks or even months. The different elements forming the combination are water and polyethylene glycol (PEG) or a similar member of the glycol family, such as polypropylene glycol (PPG), propylene glycol (PG), and ethylene glycol (EG). It may also include, when appropriate, one or more odor-control and/or other control substances.