I have had emails on my air-line setup on my website and I thought if I had a real good drawing of it that would explain it better. It's all put together with 3/4" black pipe, until you get down to the bank of 3 filters. There you will see where I show a reducer. That's where you have to go down to a 1/2" pipe. Don't worry about the reduction and pipe size, it won't affect the air supply because of the volume you get with the 3/4" pipe. Take your filter or filters/regulator to a hardware or building supply and get the fittings and pre-assemble so they are all in line, then you can hook them up to your main line. Black pipe is a little tricky to work with to keep it from leaking. If you use lacquer thinner and a small wire brush and clean those threads really good you won't have any leaks. I have a run of about 75 feet of pipe without any leaks. You can use the teflon tape or the pipe dope, it doesn't matter. It's a good idea to use at least 50' of pipe to cool the air so the filter can capture the water. On the drawing I show just a stubbed off pipe coming out of the last filter/regulator. If you can add more 3/4" pipe, the more pipe the better it is. I didn't try to give you any kind of length here, most pipe is sold in 8' lengths. You can run this setup around an inside or outside corner but the intent of this drawing is to show you how your pipes should slope and the flexible hose doesn't have any flat spots in it to trap water. Any filters will work, there are probably some better than the Sharp. I've been using these for close to 20 years and never had a problem with them. For what it's worth, here are the numbers of the flexible pipe:
DIN EN 853 2SN19 = SAE 100R2AT 3/4" WP 3100 PSI
This is an overview of the lines.