adding a tank to my compressor

Yeah, that's what I did on my setup too - you can see the wiring in the photo.

Paweł

You should install the pressure switch in/to the new tank, or move the switch from the existing tank to the new one, so that shutoff is controlled by pressure in new tank.

Disclaimer----You build this at your own risk----

You can take a section of heavy wall PVC pipe, use the PVC primer and glue to attach end caps. If available get caps with threaded fittings and adapt to air hose fittings.  You can get a regulator with gauge at Harbor Freight.  If not running a water trap, you can get the disposables at HF as well for a couple of bucks each. Tailor the length of pipe to your space, but I would go at least 18 inches.

EDIT******* this is only suitable for AB compressors that generate around 50 psi.  DO NOT use on standard compressors that generate upwards of 100 PSI

I went with the 3 gallon oiless compressor from HF which I picked up for 40.00 on a coupon, then attached a water trap and regulator/gauge.

Grainger has complete setups with 2 gal tanks starting at $129.00. Harbor Freight units w/3 gallon tanks for as low as $59.00. No hassles and certified components. I set mine, a 1/2 horse compressor with a 7 gallon tank, out in the workshop, wired it to a switch indoors by my model room spray booth with a regulator and gauge assy. Cant hear it and it's got plenty of air. Sometimes I do forget to turn it off when I'm done because I can't hear it. Gonna replace the switch with one with a pilot light to help remind me.

EJ

Hello!

While the cost to do it has to be taken into account, there are benefits, too - like if you physically separate the air tank from the compressor, the air flowing through the air line can cool off - this is much better for the moisture trap. You could also contemplate putting the compressor in another room and the tank at the workbench for more quiet operation.

A suitable tank can be recycled - people around here often use old fire extinguishers, gas bottles or parts from old air conditioners for this purpose. I have personally built my compressor using a refrigerator compressor and a gas bottle:

Hope it helps, have a nice day

Paweł

Think about what it would cost you for a tank and all the connecting hardware. Plus are you gonna have the tank just hanging out next to the compressor connected only by a hose or tube? Or are you going to the time and expense of somehow housing them together. After all this is your Rube-Goldberg like contraption gonna work or work as well as a store bought unit?

Are you looking for something like this....... http://i967.photobucket.com/albums/ae157/Jun_Austria/AirbrushCompressor_zps853fb96d.jpg My compressors is an Iwata on the left and a Sparmax on the right. Both sharing the same iwata tank with a regulator. The tank I bought from www.hlj.com http://www.hlj.com/product/AIWHPA-TNK35/Sup