Collection: Air Pipe & Fittings

Half inch pipe moving 50 CFM over a 100 foot run gives up roughly 10 PSI. Three quarter inch over the same run gives up about 2. That is the entire argument for sizing aluminum air pipe to flow, and it is why the most expensive mistake in a compressed air system is matching pipe size to the compressor's outlet port instead of to the CFM going through it.

Keep velocity in the mains between 20 and 30 feet per second and you will stay out of trouble. The pipe sizing guide has the tables, and the piping layout article covers why a loop beats a dead end branch: air reaches every drop from two directions, so pressure holds when two machines call at once.

What is in here

Aluminum blue pipe in main and drop sizes, compression elbows at 45 and 90 degrees, equal and reducing tees, unions and straight couplings, tapping flanges and flanges with valves for clean drops, NPT transitions in aluminum and brass for tying into legacy black iron or copper, full port ball valves, and the cutters and prep tools that make the joints actually seal. It all matches up, which is the point of buying a system instead of a bin of fittings.

Two things we will tell you straight

Never run PVC for compressed air. It goes brittle with oil and age and fails as shrapnel. There is no version of that story where it is acceptable.

And black iron is not always wrong. For a ten foot run out of the compressor room on a tight budget, threaded steel is fine and cheaper. Aluminum earns its money on long runs, lots of drops, and systems you expect to extend or move. Either way, take drops off the top of the main and slope mains toward a drain leg, or you will be chasing water out of tools no matter what the pipe is made of.