A brief article about waterproofing as told by a top contractor in Miami, FL
When doing add-on home waterproofing, whether you connect your new bathroom fixtures to a main vent that's already there or run a new vent up through the roof, depends on how far away the present one is. we don't advise locating the new toilet any farther than eight feet from the 3" or 4" existing stack, measured along the centerline of the toilet's soil piping and fittings. In many cases installing a new vent up through the roof is easiest.
When it comes to waterproofing, washbasin waste will drain by gravity into the existing building drain, as a general rule. This is in any situation. When it comes to roughing a DWV waterproofing station, the wide selection of Genova pipes and fittings serves you well.