HOME › Forums › Plastic Apex Piping – 9.5 and 9.8 Occupancies Tagged: apex, fuel-fired, piping, sprinkler This topic has 1 reply, 2 voices, and was last updated 9 years, 1 month ago by Charles Turpin. Viewing 0 reply threads Author Posts July 29, 2015 at 3:03 pm #1747 Denis MauriceParticipant Are Fire Departments allowing exposed plastic apex piping in lieu of standard copper piping to sprinkler fuel-fired appliance service rooms to satisfy 9.5.2.10 (3)(b) and/or 9.8.2.3.? Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In