Freddy wrote:The 1" pex-al is larger inside than the 02 barrier. I don't think one loop of 02 would do the job. I ran two loops of it. I insulated it myself.
The next thing....pex is only rated 180 or 190*..
Freddy, just curious.... Two questions for when I goto install a coal fired boiler:
1) Why didn't you go with a single loop of 1 1/2" or 2" dia pipe? Why two loops of 1"? I believe you have 3 or 4 times the volume in a 2" , with reduced restriction, than a 1".
2) If your worried about the pex overheating temp (190F), why not use copper? Expensive? Yes. But it solves the worry of overheating it.