On Tue, 14 Mar 2006 06:34:23 -0800, Larry Jaques
wrote:

On Tue, 14 Mar 2006 14:16:05 GMT, with neither quill nor qualm,
Michelle quickly quoth:

In talking to our local plumbing supplier about that very subject....
Black copper or PVC is fine.
I went with PVC. easiest to work with and cheapest.

Michelle, I worked with PVC air lines for years and nobody got shards
imbedded in their eyes (skulls, or anything else) BUT, PVC isn't rated
for air pressures and can explode. I no longer recommend its use after
reading the official stance. OSHA has _kittens_ upon its mention in
that usage.

http://www.osha.gov/dts/hib/hib_data/hib19880520.html

I now recommend black pipe or copper tubing or air, though there are
some plastics now used in air lines: Nylon, polyurethane, and ABS.

http://www.cbs.state.or.us/osha/interps/1989/im-89-06(rr).pdf
http://www.newageindustries.com/sprthncl.asp
http://www.colexint.com/pneumn.htm


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Heart Attacks: God's revenge for eating his little animal friends
-- http://www.diversify.com Comprehensive Website Development --
Greetings Larry,
I worked in a shop that had all PVC airlines. These were mounted about
8 feet from the floor just because it was easiest. These airlines
started to blow up about about 15 years after being installed. When
they did blow shards were imbedded in plywood about 6 feet away.
Nevertheless, I have installed PVC in my shop. It is 8 feet up and
behind OSB sheets. Again, just because it was easiest. However, it
will all eventually be replaced with something safer. Already some has
blown and it is only about 7 years old.
ERS