Threads on fittings and plugs?

[Externet]

Hi all.
Tried to find an adapter to hook-up a plain 0-200 psi industrial gauge to a low pressure port on the first stage to confirm regulation is in specifications, and after visiting many suppliers of hardware, from hydraulics to automotive to aviation to pneumatics, none seem to fit.
What are they? Scuba-unique threads and sizes? Is there metric and non-metric too?

The sample hose I carried with me was a low/inflator one, with the "3/8" thread; and asking for quick disconnect fittings, nobody had seen one alike before.

I also want to install a "Y" a couple of inches before the inflator quick-disconnect end and permanently attach a secondary second stage "octopus" with about 5 inches of hose there. (or the opposite, tapping a quick-disconnect to a secondary regulator hose) The hydraulic fitting experts do not have anything for hoses under 1/4" to do it. ¿?

:no I clearly understand life supporting equipment is not to play with; but I wasn't born yesterday either, and safe plumbing is still safe plumbing. As safe as any regulator manufacturer can crimp a fitting.
Thanks,
Miguel

 

[rigdiver]

Go to your LDS and ask to see a Global or A-plus catalog. There are adapters made specifically for your needs. They are hard to come by, but available. M-J Engineering makes the Y that you need. They may have just changed their name to Omniswivel.

 

[neil]

Start with an adaptor, 1/4 NPT to BC QD, there's one on this page http://www.diveriteexpress.com/regs/hoses.shtml


Even better, thanks Rigdiver.
Omniswivel http://www.omniswivel.com/products.html

 

[knotical]

http://www.scubatools.com/AirProd.html

 

[DA Aquamaster]

A 1/4" NPT to BC QD fitting can be attached to a standard hardware store 2" long 1/4" NPT to 1/4" NPT nipple which can then be attached to your industrial pressure gauge.

It will then connect to any standard BC hose. It's a lot more convenient than screwing it into an LP port and saves wear on the o-ring used on the LP port plug.