Factory assembled and requires no threading, flaring, soldering or welding to install Insert plain end of pipe in fitting and tighten the nut Neoprene gasket makes a perfect seal and is not affected by the properties of air, water, gas, butane or propane Withstands high pressures and temperatures Used where a cut must be made in existing lines and for hard to get at repair or installation jobs Re-heater lines water systems, etc soldering or welding to install Galvanized malleable iron 1-1/4 in. IPS x 5-1/8 in. length