I just stumbled across you fun guys over here....
I see a buncha different names, all kinda trying to do something life-threatening on a budget.
Xtreme guys, huh?
OK, I can hang with that...
The little pancake compressor in the picture is probably contaminated with oil.
If NOT in a lube crankcase, it has assembly lube in it...
And guys, if you haven't been advised yet, there is no telling what those Chinese fellows used in the content of the machine...
If it is not made to produce breathing air, it does not!
The gases produced by the compressor and hose (itself) could be and most likely are toxic.
It may not get you now, but it will complicate your life later.
A sure sign of petroleum contamination is a bit of dizziness, or puking when you have to get out of the water.
I'd take that compressor apart, clean it VERY well, and lube it with an acceptable breathing air lubricant.
Also flush the hose with water quite a bit, and also leave it out for a sun tan, to cook it a bit in the UV's.
Next, I would get a filter designed for breathing air... they got 'em... It goes in the line, after the compressor.
Might as well start smokin' cigarettes guys... it's fashionable!
and just as wise as using an import cheapo compressor!
And yes, you can monkey around with the spring in a 2nd stage regulator for hookah use so they work.
But I'll tell yah, I did all that fun stuff many years ago on a mining claim and never got deeper than 6 or 8ft.
Yup, my lungs are hangin' in there, today. But I ain't runnin' no races!
The wreckdiver should be along to give you better advice...
HH
rmptr