For use on galvanized pipe and copper tubing. 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. This Compression Coupling is one of many top quality items in our Brass Unions & Couplings department.