"William Noble" wrote: you can get one at sears
or maybe even a used tool place - any decent air line filter (not a pure
moisture trap) will do. (clip)
^^^^^^^^^^^^^^^^^^^
A mason jar full of cheesecloth makes a pretty good filter. Make sure when
you solder in the tubing, that one of the lines goes to the bottom and the
other to the top. Or a hose with cheesecloth stuffed in.