Threaded Connections: Black pipes are commonly obtainable with threaded ends, enabling for easy and safe connections using fittings. Threaded connections empower a good seal amongst pipes, making certain correct flow and minimizing the chance of leaks. CSST pipes are made of skinny-walled stainless-steel tubing using a corrugated or ribbed outer https://www.lookah.com/bongs-and-water-pipes/