Not sure whether this would be better in materials or mechanical. I'm building a vacuum chamber which is going to house silica gel, I've got a prototype made out of PVC, but I'm afraid of running it up to 180-200 deg F to regenerate the silica. For the large scale I'm gonna need to build a chamber to house around 40 gallons of silica gel, I will have a better estimate once I play around with the prototype some more. Oh and I plan on using multiple tubes rather than a single pressure vessel. I was wondering if anyone has any experience with heating CPVC. I know it will do better by looking at the pressure temperature tables, but is this a reasonable solution? Is there something better? Thanks.