Plumbing rough in Home › Forums › Public Forums › General Plumbing › Plumbing rough in This topic has 1 reply, 2 voices, and was last updated 23 years, 2 months ago by fourth year. Viewing 1 reply thread Author Posts 29 Jun 2001 at 3:03 am #275031 MasterPlumbersKeymaster I must run a PVC pipe through a 2 inch thick gypsum fire separation wall between apartment units. Where do I find what the regulations are as to what I need to do to maintain the fire rating required? Jack 30 Jun 2001 at 6:19 pm #290965 fourth yearParticipant Your building department can give you that information, and also advise if you can even use PVC if it is a fire rated structure. 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