Sounds like inadequate venting for the drain lines. Could have been build this way or maybe a clog has developed in the vent pipe. Such as birds or squrrels building a nest in the vent pipe up on the ... read more
Begin by going to www.NARI.org and find a chapter of the National Association of the Remodeling Industry in your area. NARI members are held to a high standard and they commit to a Standard of Ethics ... read more