MagillaGorilla wrote:
Here is my question; If this way is the better way to winterize, why don't the RV places use this method instead of the antifreeze method?
Actually, they do. I know of at least one major, well respected RV manufacturer that when asked about this subject, said that they use the compressor blow out method on units they ship up north, and they say it works just fine.
I also know of an mobile RV service tech that is contracted to winterize several RVs that are parked somewhat permanently up in the mountains. He also, used air.
I have always used air blow out method to winterize. Been doing it that way for years, as long as I can remember. Never had an issue. My thoughts have always been, if its good enough for the ones that build these things, AND for a service professional that works on them every day, its good enough for me.
However, after watching my brother in law have a plumbing leak on one of the toilets in his RV last Spring after he did the blow-out method....I'm starting to re-think that. Made me feel bad that I taught him how to winterize with the air compressor, he followed my suggestion for such, and had a plumbing fitting on the toilet break the next Spring.
I think the key is, you have to do it right, and many people do not. With the blow-out method, there is not as much room for error. You have to get all the water out, and that takes a little more time with the air method than it does with antifreeze. The big advantage, though, is that you keep that nasty pink stuff completely out of your fresh water lines, so 'de-winterizing' is pretty much non existant.
Not sure if I'm going to continue using the air method or not...