I am an instructor in the Pipe Trades Program at The Northern Alberta Institute of Technology (NAIT) in Edmonton Alberta Canada. My specialty area is in the gasfitting and gas appliance areas. Also hydronic heating is a hobby of mine. I would like to offer assistance to those that need it. I'm sure that my years of experience will do some good. I am a journeyman Plumber, Steamfitter/Pipefitter and a First Class Gasfitter, and have been in the trade since Jan. 1997. I don't always have the answer, but would be glad to do some research for you if I can. Remember taht I am in Canada so some of the codes and standards here may be different than the US.