Compression fittings (from time to time termed "lock-bush fittings") encompass a tapered, concave conical seat; a hollow, barrel-shaped compression ring (sometimes referred to as a ferrule); and also a compression nut that's threaded onto the body of your fitting and tightened to create a leakproof link. They are usually manufactured http://doubleblockandbleedvalve00741.pointblog.net/The-Greatest-Guide-To-pipe-fitting-26999330