Re: [VAC] plumbing

[Steve Hingtgen <Steve@xxxxxxxxxxxxx>]

Phil,

Plastic has changed.  Engle PEX tubing (the best type of cross-linking)
currently holds the unofficial world record for long-term testing at elevated
temperatures and pressures -- 23 years at 203 ° F at 152 psi, and still going.
PEX tubing is rated at 180° F at 100 psi, 200° F at 80 psi and 73.4° F at 160
psi.

Also, PEX's flexibility prevents creep deformation, or weakness in joints,
caused by movement within the piping of a plumbing system. Over time, this
occurs in less flexible plumbing systems. The flexibility of PEX allows for this
movement and adjustment.

Unlike copper, PEX resists freeze-breaking. PEX material stretches to match the
swelling of frozen water. It then tightens back to its original form when the
frozen water melts.  PEX gets this ability from the cross-linking process which
makes PEX much more stronger than regular plastic pipe.

Steve
http://www.AirstreamDreams.com