To sweat a copper pipe, cut and clean the end of the pipe, then apply a soldering paste to the end, and seal the new fitting with a blow torch. You need a hacksaw, pipe cleaning tools, a flux brush, soldering materials, a blow torch and a rag.Continue Reading
Use a hacksaw to give the end of the pipe a clean, straight cut.
Use a wire pipe brush to clean the insides of the pipe and fitting. Use a wire brush to polish the outsides of the pipe and fitting.
Coat a flux brush with soldering paste, and apply the paste to the polished surface of the pipe as well as the inside of the fitting.
Slide the fitting on the end of the pipe, and twist the fitting into the desired position. Ignite a blow torch, and run the flame along the middle of the fitting rather than the area with the soldering paste.
With the flame still running along the middle of the fitting, solder the joint where the end of the fitting meets the pipe.
Turn off the blow torch, and wipe away excess solder with a clean rag.