Just got the Dec/Jan Copy . In the article titled"Shop compressed air for in
house tire service" The author describes in detail a coil of copper tube he
installed in his air line, but doesn't tell us why. Am I missing something?
Is it obvious why? All I can see is it adds volume to the system and might
be a good way to camoflage a still from the revenuers.

Anybody have any ideas?

John