I found antifreeze on sale this year for $2/gal. It takes a bit over a gallon and 10-15 minutes from start to finish. No way I'm lugging a compressor around when it's that easy to do the job without it. The other interesting point is living in the northeast and walking around dealer's lots. I have been doing that for two decades now and have yet to find one where, in springtime, you don't see every sink, toilet and shower of every dealer owned RV with pink slopped all over. Just guess, but if blowing lines was foolproof, and saved a few bucks per rig, I doubt dealers would be buying so much antifreeze, and paying their help to use it in their inventory?
