I went to visit my Dad in Hewitt / WACO TX. and looked at the system that had just been installed. The primary drain line wasnt insullated (thats not to complain about)but the vent pipe was two different types screwed together and not to straight either but the worst thing about it was the 5"old vent was still loose in a flashing that was a china cap with the old cap removed and the new metalfab cap screwed on in its place,and in Texas inforcing hard galv. piping outside the furnace cabinet & running stainless steel flex to it they just ran the old 20 yr old brass flex instead.Permit was pulled? city inspector came & passed.
[Edited by acg on 07-17-2005 at 08:37 PM]