Protect any wood framing near the fitting being removed with a piece of sheet metal or other non-combustible material. You must heat the copper pipe and fitting slowly with an open flame and take care to prevent combustion of any wood or other materials nearby. If necessary, wrap the copper pipe 4 to 6 inches away on each side of the fitting with a cloth rag soaked in cold water to help prevent unwanted heat from radiating to nearby fittings.
Attach a spreader tip to the burner of a propane torch. Set the flame length to burn approximately 1/2 to 3/4 inch beyond the opening of the tip.
Apply the propane flame to the length of the copper fitting in a back-and-forth motion to heat the fitting and attached piping evenly.
Heat the fitting until the exposed solder begins to liquefy. The dull finish of the solder will become shiny and chrome-like when it is sufficiently softened to separate the fitting. Immediately grip the fitting with adjustable pliers while holding the pipe. Twist the fitting back and forth to pull it loose from the pipe.
Repeat Steps 3 and 4 to remove additional fittings. Clean the residual solder from the pipe ends with a piece of plumber’s emery cloth for reuse.