Definitions please Home › Forums › Public Forums › General Plumbing › Definitions please This topic has 1 reply, 2 voices, and was last updated 24 years, 9 months ago by Scott Bryan. Viewing 1 reply thread Author Posts 26 Feb 2000 at 3:17 am #272534 MasterPlumbersKeymaster What do PDI and LIA stand for? 26 Feb 2000 at 2:42 pm #285888 Scott BryanParticipant What are these terms related to in the plumbing field? 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