am reading the air is OK if done right. how do you know if you have done it right? In my first TT I got lazy and blew out only one winter. apparently I didn't do it right since the next spring I had some pipe to replace. some have said there is no way they would hook up an air compressor to their fresh water system esp since the air compressors have rusty dirty water in the bottom of the tanks. they do not want that stuff in their pipes. My conclusion is to drain you compressor, and do blow out the lines then follow up with anti freeze. this is what I have been doing and have had no problems with freezing pipes in the last 40 years.
