Review on 🔧 Maxline 1/2 inch x 100 Feet Air Compressor Accessories Kit: Leak-Proof HDPE-Aluminum Piping System, Easy Installation, Connects w/ any Hose, 100 PSI, 35-Piece Set - M3800 by Philip Berry

A 1/2 line is enough for most household businesses and is quite full. You still need air fittings at the end of each drop, you also need wall clamps, but use PEX 1/2 clamps instead, they're half the price and better made and work better. There are several fittings, each requiring a teflon tap and plumbing paste - IN THIS ORDER. I use YELLOW Teflon as it's a bit thicker, I wrap it 2-3 times depending on the size of the piece and then apply a thin layer of paste to it. After fully attaching the fitting, wipe off the excess paste. Don't over tighten the air lines like they say, mark the ends and screw them in 1/4 turn or all the way in, you can't get more than 1/2 max, usually 1/4 inch. Money. Measure twice, measure again, then cut. Oh they sell a fancy air line straightening machine (aluminum = hard) that you can use once, no you can't return it either so I decided to get a 6ft 3/4 PVC rod and run it through the air duct and everything worked great. Use a 5 gallon bucket filled with water as the corner radius - no need to buy $90* because this stuff will run out. will bend pretty tight. A 1/2 hose fitting is included specifically for the Rapidair 1/2 regulator/moisture separator - buy don't skimp - buy once, cry once - it's a well built unit and plugs right into the equipment. Hope that helps! Edit: Update - system is completely installed, everything is self-made, turned out better than expected, see photo