I could have worded my question better, sorry about that. Is that "yes", they do not have annual fees? Or, yes, they do? And, is the insurance professional insurance, such as from V&B, or personal, such as through DAN?
If this is in another thread, let me know, but are there small "personal" sized compressors? That are inexpensive? And, reliable? And, durable? Because I can't imagine ones the size a dive shop would have as being inexpensive enough (plus, space requirements) for somebody with a handful of...
Boboqa- it's a regional company, maineoxy.com. I found them on the DOT website listed as somebody who does hydro's. They said they do lots of SCUBA tanks, though they seemed unfamiliar with the VIP program. I figured if they could do the hydro, then my LDS could do the VIP.
There seems to be some confusion in the field of hydro's and "+" ratings. My local dive shop is certified to do hydro's, but claims that it takes a special certificate/credential/rating/permission (or something) to do the "+" ratings. I called DOT, and they refuse to put anything in writing...
I thought I had read (not sure where, at the moment) that 3500 psi was the cut off, at and above which cylinders become "high pressure", and require a DIN type valve.
I believe I have seen tanks marketed at 34XX psi with yoke valves, perhaps as 'medium pressure'?
And, there are low...
Interesting. So, why would they continue to make and sell ones with a crush washer, if they can be so problematic?
I am learning more about valves. Thanks!
If these don't work well, I can trade back the old valves, or look into other options like the DGX.