soil stack Home › Forums › Public Forums › Drainage & Sewerage › soil stack This topic has 1 reply, 2 voices, and was last updated 24 years, 7 months ago by SylvanLMP. Viewing 1 reply thread Author Posts 8 Mar 2000 at 5:05 pm #278467 MasterPlumbersKeymaster What is the best way to plug a 2″ hole in a cast iron soil stack? This is a T in the pipe that a 2″ pipe from a sink drain use to go to. Right now I have a 2″ “test plug” in installed. Is there a better way to plug this long term. 2 Apr 2000 at 9:06 pm #298570 SylvanLMPParticipant If it is a bare pipe use a NO HUB Cap NOT A FERNCO but real NO hub or a Mission cap. SylvanLMP 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