A grooved fitting, also referred to as a grooved coupling, has four things: grooved pipe, gasket, coupling housing, and nuts and bolts. The groove is produced by chilly-forming (or machining) a groove at the end of a pipe. A gasket encompassed by coupling housing is wrapped within the two pipe http://valvesandfittings69147.atualblog.com/134322/the-fact-about-valves-and-fittings-that-no-one-is-suggesting