Posted by David Sherman on Thursday, March 13, 2003 at 6:45PM :
In Reply to: Re: burying air lines posted by Don Williams on Thursday, March 13, 2003 at 9:13AM :
I can easily see how PVC would become shrapnel. It also tends to get brittle with age, especially where the sun hits it, so even if it worked fine for a few years, it might surprise you later. Copper is cheap enough and easy to work with.
For a long underground run, what do you think of using the black polyethylene (poly) water pipe? It's flexible enough to withstand settlement and frost heaves, and tough enough that it shouldn't fly apart into shrapnel if it breaks. It won't corrode no matter what the soil or electrolytic conditions are. It's readily available in ratings from 80 to 300 psi. I have 1500' of 1" black poly pipe for my temporary water line, laying on top of the ground. It freezes and thaws daily for about half the year, but has never broken. The bears bite holes in it, but that's a different problem. Anyway it seems like this would be good for a long compressed-air run, but nobody uses it. Am I missing something?
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