winterizing with compressed air

larry cad wrote:

Lantley wrote:

larry cad wrote:

JaxDad wrote:


It might just be easier to learn how to do it properly.

For several years I used the pink stuff, and several years ago, I decided to do the air winterize procedure. Come spring, I put water in the coach and guess what, I had a leak. Now, here is the interesting part, the leak was behind my shower, in the water control spigot. Even more interesting is the mode of failure. The water control valve has a threaded hole in the bottom, and there was a nylon 1/2" pipe plug in it. In the top side of the pipe plug, was a depression molded in during manufacturing. If you look at a nylon pipe plug, you will see it. Since the depression was facing up, it remained filled with a tiny bit of water during the winterizing. During the winter, it froze and cracked. When I put water into the system, it ran out the crack.

So, as suggested above, I learned how to do it properly. Properly would be to remove the wall around my shower every winter, remove the plug, empty out the tiny bit of water remaining after I use compressed air, replace the plug, and my RV is winterized.

Or, I can just use the gallon of pink stuff I always had used in the past. Even though I now know how to do it "properly"!!

:S

This^^^ Is why you use the pink stuff. It is simply more foolproof.
Air is doable, but as mentioned there are more variables to deal with that simply are a non factor with anti freeze.

:B

When two people are wrong it doesn’t change the facts and suddenly make it right.

Google “Venturi effect”. If you pass air over a dead end to the passing air will create a vacuum on the dead-end tube and inhale the water out of the tube and pass it into the stream of moving air.

If you pass air over a dead end tube the passing air will create a vacuum on the dead-end tube and inhale the water out of the tube and pass it into the stream of moving air.

That is why Doug said clearly you need to keep the air flowing until there is no more drops spitting out of the fixtures.

Using too little a volume of air and / or not blowing the lines long enough will almost certainly leave water behind.