Using a spring to bend pipe?

Are you talking about ductile copper? If so, that's all there is to it.

Make sure that the pipe goes in the correct end of the spring. It has to wind CCW from the top. If you get it wrong just turn the spring around.

Less than 1 inch diameter 6061 or "structural" aluminum from McMaster-Carr. Seemed to work okay, I just wanted to avoid crimping or weakening the pipe. It is shaped like the upper rear part of a folding chair, an upside down U.

Wait, what?

He's just havinga bit of fun. You've got to unwind the spring and wind it the other way around. ;-)

Are you sure I don't need a left-handed monkey wrench to take it apart if I get it wrong?

I think you can fix that with a can of vacuum, too, but I can't remember the details.

I can't seem to locate an MSDS for vacuum.

We laugh at "can of vacuum" but if you look under the hood of '76 Lincoln you'll find a coffee can being used as a vacuum reservoir--maintains a pressure low enough to work the headlight covers several times.

It's right next to the assortment of replacement smoke.

On Sat, 10 Jul 2010 09:54:38 -0700, "Paul Hovnanian P.E." wrote the following:

Well, that sucks.

Does not! All that stuff outside the can blows!

Yeah, but you have to have a Langstrom 7 inch wrench to do that. Contrary to popular belief it works on Finley sprinkler heads too.