LarryJM wrote:
Biggest issue with just blowing out the lines is that if your system has a low run of pipe you could end up with water in it after blowing out the lines since residual water could drain and collect in that low section, freeze and cause an issue.
Larry
That could only be an issue if you don’t blow the lines out properly. I did an experiment a few years back for sceptical friend to show him how well it works. I took a 100’ coil of clear fuel hose and hooked to to tap, then with it standing vertically hooked it to the compressor with the regulator set to 50 psi. There wasn’t a drop left in the line.
The issue arises when someone uses a very small compressor that can’t
maintain the required pressure for very long, or just doesn’t perform the task correctly.
JoshuaH wrote:
Thanks. We like to camp off grid in the winter, after pricing RV antifreeze I got to thinking I'm going to be spending a lot of money each time we go, would save some money to just blow out the lines.
That makes it sound like you think you’re going to put water back in the system each time you use it during the winter. That is a VERY dangerous proposition. You will have a lot of lines in places you can’t heat enough to prevent freezing.