Pex and Freezing Temps

I guess if your interpret it literally then no, sewage drain and vent pipe are not pex but I don't think sewer and vents are areas that would freeze. It's really the water lines from the fresh tank and city service and the water that collects in the p traps that you have to worry about.

1L243 wrote:
Huh what?

Are you saying all of your drain, waste and vent pipe is PEX and only the p-traps are not? That's how it reads.

Bruce

Huh what?

Have been in temps as low as -14*F and no issues other than high propane use.

PEX is very forgiving piping.

Fittings are the weak link.

1L243 wrote:
All the plumbing in my trailer not counting P traps are pex.

Huh?

Bruce

I wouldn't worry about the PEX freezing solid, but You would end up with split faucets and shower heads

Jack L

In the freeze test the guy put pex in the freezer for a week with no rupture. I think that is pretty good. There are other tests where a guy used elbow fittings with no problem. I think pex is pretty good. For those who might be full timing in the winter....

I have had a freeze up while in use and no leaks. Maybe just lucky.
Since have added a circulating warm water system to avoid issues.

Pex can and will freeze and break - it is not immune or freeze proof.

I have done my own freeze test.

Back on 2006 I took the north route to Utah and NV Well when I stopped for the night in Wyoming the weatherman said "low tonight 19" I figured we'd be ok.

Woke up long about 3am, feeling a bit chilly, -6 on the outside temp display.

Busted a fitting less than 10 bucks to repair. (ICE MAKER line was full of air by the way).

Last winter hit 11 degrees, Could not flush toilet, (Pex froze) Connections were well heated but the line that crossed over from the water pump (Curb side) to Toilet (Driver's side) froze. And thawed.

NOTE: only the cold line froze so I flushed with a 2-quart measuring cup as a bucket and dumped hot water in the thing to flush it. (You can do that with a Sea-Land style).

Soon as the temps came up with the sun flow returned.. No damage, repair cost 0.00.