No vex with pex

[HKestenholz]

Pex is only rated to last a century.
Plumbers don’t like it when anybody can put systems together using fittings that don’t require solder.

http://en.wikipedia.org/wiki/Cross-linked_polyethylene

http://www.HeatProUS.com energy businessmen’s knowledge

Yes, you really have to find out the MAKE and MODEL to get good answers. There IS more than one machine made.