Steve,
Mold/condensation is my number one concern. But I believe that the cases of the mold that really caused bad problems were badly installed systems. (
http://www.greenbuildingadvisor.com/...rth-tube-story) The good news is that I have access to a high pressure jet machine used in the plumbing world. So if/when some mold forms I can completely clean the pipe out, and do this on a routine, kinda like cleaning your shower.
Also I am not using the PVC solid pipe. I think a lot of systems used PVC and I believe it is impossible to get every drop of water to drain out of a long piece of PVC. With corrugated pipe each and every inch will have its own drain.
Pull no punches, I will do nothing that will endanger my family. I will take every warning seriously and as always TEST TEST TEST before I go full scale.
Awesome article:
https://milligansganderhillfarm.word...ool-your-home/
I also have a pipe line inspection camera, so when the test do start I can get a good picture of the pipe if it starts to form mold.