[Shop-talk] Portable air tanks?

[cavanadd at frontier.com (David C.)]

I have an old portable propane tank I use for a portable air tank.  I 
did the conversion probably 15 years ago and all I remember is that the 
valve was really hard to get out and you need to be ingenious in 
securing the tank so you can get enough torque on it.  It also takes 
quite a while for all the propane smell to go away.

shochschild at att.net wrote:
> I would like to piggyback on this and ask if any of us have added the
> hardware to an outdated propane tank to make an air pig out of it??
>
> I remember seeing this discussed, and I seem to recall that unscrewing
> the original valve is a challenge -- any actual experience?