TrimixToo
Contributor
I've picked up few of these used for very reasonable prices (like $35 a pop). Look for industrial salvage sellers. I have one rigged with a DIN valve fitting to run off scuba tanks when I'm away from home where the big shop compressor lives. It works great, but the booster is very air-hungry so there has to be significant motivation to use it. Really expensive mix fills and no way to transport lots of tanks. No mix available. Stuff like that. Shop compressors are a lot cheaper than breathing air compressors. I mean, a *lot* cheaper. If I had to buy fills to run the booster, I could pay for a suitable continuous duty shop compressor in a year or two at most. Did I mention that shop compressors are less expensive than breathing air compressors?