Bill thanks for your advice and offer. In order to avoid damaging the threads on my inlet valve i'm looking for something on the other end of the supply hose (female). The 3/8 npt male will go in a couple of turns but not enough to seal the compression barb in the hose. I think your suggestion would work going BSPP male > NPT female, but it doesn't work going the other way. In any case, I have MacGuyver'd up a temp solution with some hose and screw clamps and will order up the correct part Eric identified (Swagelok SS-6-HN-6RS) or the McMaster equivalent. Actually i'll probably order about 10 of them so I have a stash.

I will not force any NPT on BSPT or viceversa,
you might create a small airline crack forcing brass fittings
that will now "explode" until later and you will have a lake view where there shouldn't be one
JG believe is a very easy and after all not too expensive way
you can see some prices on our web page or from other vendors online

Actually i'll probably order about 10 of them so I have a stash.

At about $10 each, I'd have a second thought on that one. For a garage test installation, "all bets are off" and you can do just about anything you want.



As per the above, you really don't need to "tap" into a positive pressure line - all you really need is some container at about pump height and all should be well. However, the great part about a garage/test installation is that you can duplicate what you might plan for the kitchen (shut-off valves, pressure regulation, filtration/softening, drip tray drain fittings) and "work out the bugs" as they say. This is NO trivial matter.

In the picture, I happened to have had the "tank" from a previous adventure and the machine hookup required just one trip to the hardware store. So, in your case, a simple hookup to test out the machine in the garage using John Guest (or equivalent) fittings and tubing is relatively simple. BUT, to configure this machine's (or a future acquisition) kitchen-based inlet system requires a little thinking and a cup-o-coffee or other suitable beverage.