NPS to NPT?

Shana,

Seems you have put much thought into your system but, personally, I think it's 'over engineered'! Have a look at some commercial AB compressors with tank and you'll find a much simpler arrangement. You simply need to connect the compressor to the tank, have an outlet from the tank to your regulator then to your airbrush. From the description of your Vlair tank, it has 4 ports - all 1/4" NPT. Get a 1/8" BSP female to 1/4" NPT male and attach to your compressor. Then a 1/4" NPT male extension into one of the ports on the tank. Connect the two with pressure tubing. Screw your gauge into one of the free ports on the tank. From another port on the tank insert another 1/4" NPT extension, connect a 1/4" pressure hose that goes to your regulator then regulator to AB. One thing missing from your schematic is a drain valve. Water is likely to collect in the tank and you need to be able to drain it. I don't think the moisture trap at the compressor is needed (or will do much good), I don't think the ball valve is needed (I empty and drain my tank after each session). I don't remember your regulator but you'll likely need and 1/4" NPT male to 1/8" BSP male or an 1/4"NPT male extension from the regulator and a another 1/4" NPT female to 1/8" BSP male.

Awright, I use a system that's similar to the one on the drawing. It looks like this:

I also have a moisture trap at the supply port of the tank, made out of a gas bottle. I had no way to drain the tank, so at least I wanted to keep it as dry as it gets. This way the air has the opportunity to cool down in the coiled line before it hits the moisture trap. But on the delivery port of the tank I only have a safety valve and a regulator, that also works as a shutoff valve if necessary (if you turn it down to 0 psi). The quick disconnect also is airtight if you disconnect it. So you don't need a valve, for sure. You also don't need a separate fitting for a gauge - you got one on the supply line, on the moisture trap, showing you what's inside the tank, and another one on the regulator, showing you what's coming out.

Hope it helps, have a nice day

Paweł

Shana, check out if you have a Parker store near you. Parker is a storefront that supplies pneumatic and hydraulic hoses and fittings. They most likely will be located in an industrial park but they do sell to anyone. If you don't have one in your area, look for grainger.

Shana, after my post above it occurred to me that you really only need two adapters to do what your want. And, if there's a Harbor Freight near you, you can get all you need there. The Harbor Freight airbrush hoses come with 1/8" BSP hose ends plus a 1/8" BSP male to 1/4" NPS female adapter (see my pic below). Get two of them (about $6 each when I bought the one shown). Screw one end of the hose into your Sparmax compressor (it will fit) and, using the adapter attach the other end to a 1/4" male/male extension which you screw into your tank. Attach another 1/4" extension into your regulator and then screw regulator into another port on your tank. If needed, add another extension to the regulator and attach the second hose - adaptor first - to you regulator. The other end of the hose will fit you airbrush. Any other connections you wish to make are all 1/4" NPT and easily available (at Harbor Freight or local hardware store) i.e. tank pressure gauge, drain, pressure relief valve etc.

BTW Pawels set up is very nice - and probably very quiet (refrigerator compressor?) but more complex because of the few (one) tank ports. Anway, HTH.

EDIT If no Harbor Freight nearby you can get the adapters here:

http://www.chicagoairbrushsupply.com/iwaitobaho.html

Hi and Wow I read all of that, thank you very much guys! I knew I forgot to mention something though, is that I have everything on there except for the moisture trap, ball valve (but I don't need it so), and, as Bick said, 2 adapters. I realize that the 2nd one isn't really needed, but I'm always a "rather be safe than sorry" type of guy, and especially since I read the other thread about having a 2nd moisture trap to be safe. I probably will follow Pawel's setup almost, and I see I don't need the NPS pressure gauge anymore, which is good, but just to make sure, the 2nd moisture trap I'm getting is this:

www.ebay.ca/.../271328574117

it includes 2 1/4 male BSP to 1/8 Male BSP

so that alone will be enough to stop the air coming OUT of the tank when not in use? In the new setup below? (A little too bad cause now that NPS gauge will be useless and on the side, oh well only $12 for it xD)

http://imageshack.com/a/img835/3836/2pc2q.jpg

http://imageshack.com/a/img839/8691/09yy.jpg

Once again thanks for spending time on helping me.

EDIT2: Looked and the closes Parker is 90 km away :( (I live in Canada), and there is a grainger nearby, so I'll check that out, but if they don't have the 2 adapters, I'll just order from a guy on ebay in UK who has everything :D

EDIT3: I don't need a check valve do I?