Fittings Home › Forums › Public Forums › General Plumbing › Fittings This topic has 1 reply, 2 voices, and was last updated 18 years, 2 months ago by Retired plbg1. Viewing 1 reply thread Author Posts 21 Feb 2006 at 7:15 pm #277793 EBI What is an OSIP coupling or joint fitting. This is related to connecting 2″ pvc or copper pipe to a meter or backflow preventer » This message has been edited by dbarr1 on 22 February 2006 21 Feb 2006 at 11:25 pm #297150 Retired plbg1Participant Check out this site http://comet.lco.cl/WebLogs/forum/threads.php?id=286_0_15_0_C Art retired plbg 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