upstairs bath install Home › Forums › Public Forums › Drainage & Sewerage › upstairs bath install This topic has 1 reply, 2 voices, and was last updated 22 years, 2 months ago by racefanone. Viewing 1 reply thread Author Posts 9 Sep 2002 at 12:38 pm #279099 MasterPlumbersKeymaster I am looking into installing an upstairs bathroom, and was wondering if I could “T” my drainage into the existing vent pipe from the downstairs bathroom. 11 Sep 2002 at 11:22 pm #300045 racefanoneParticipant No Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In