[QuadList] PVC chemistry

[Dale Lamm]

[snip]

Ah! PVC plasticizer (materials like diallyl pthalate) leaching out of the 
hose. Besides being damaging, this material can be mildly toxic, especially 
for pregnant women.

[other snip]

 However, there is one problem that has been consistent in all of the 
VR-3000's that I've seen.  Because it can be very self-destructive, I'd urge 
anyone that has
one of the machines to check for this, even if there's no intention of using 
the machine because it will only get worse over time.  The problem is with 
the deterioration of the vacuum lines.  As they age, they begin to "sweat", 
and what oozes out on the surface of the tubing will attack any circuit 
board traces that it comes in contact with.

[end]

I've seen my share of synthetic hoses deteriorating after years of use. Am 
concerned whether the PVC spoken of in VTR air systems is the same grade of 
PVC now used as wire insulation. It would seem unwise to build new studios 
using small gauge wiring having PVC insulation or jacket material, if indeed 
it decomposes and eats away at metal. Any wire gurus here who can comment?