Larry Jaques wrote:

On Tue, 11 Jan 2011 18:16:22 -0800, Rich Grise
wrote:

Pete C. wrote:
Rich Grise wrote:
Pete C. wrote:

This a a notable risk, particularly if you plan to be breathing this
pure O2 in proximity to a running engine. A safer option would be to
breath air from your compressor via a proper filter. Such filters are
available commercially to provide breathing air from shop air. I expect
Iggy can find one used for $25.

Or you could probably get an aquarium pump for about ten bucks. ;-)

An aquarium pump isn't likely to supply sufficient volume.

OK, fair enough. What do I know anyway? ;-)

That depends on the aquarium. I've seen giant tanks whose air pumps
would blow your lungs out in a split second. (Try sucking down 350CFM
@40psi from a 5hp blower, Pete.)
http://www.aquaticeco.com/subcategor...-by-Swee****er

Yea, that would do it, but would also do in your wallet as well... I've
got a 15HP, 15CFM, 4,000PSI SCUBA/SCBA compressor sitting out in my shop
waiting for me to get around to overhauling it.