How to Replace a Flue Pipe
A flue pipe is a metal pipe lining the inside of a chimney. Sometimes it is a stand-alone pipe that carries smoke or toxic fumes out of the fireplace or stove. Most flue pipes are single walled and made out of galvanized metals sheets to ensure that the sheets do not rust because hot gases that are emitted from the fireplace have a corrosive effect that eats up the galvanized coating after time.
Tools Needed:
- Screw drivers
- Screws
- Tape measure
- Pipe crimper
- Replacement galvanized pipe
- The first step to replacing a flue pipe is to determine the section of the pipe that you want to replace. Each of the section of the flue pipe is attached to the other sections on its ends using metal sheet screws.
- Locate the screws on the section of the flue pipe that you want to replace, loosen them and remove them carefully using the right size of screwdriver. Make sure that you keep them in a safe place so that you do not lose them in case you may need to use them again.
- Slide the section of the flue pipe that you want to replace by twisting it back and forth out of the other sections.
- Measure the length of this section that you have removed and cut out a replacement piece from another flue pipe, which equals this length.
- Crimp one end of the replacement section with a pipe crimper and slide it over this end to place a crimp on the pipe. Repeat this process until the entire end of the replacement section has been crimped.
- Slide this section into the remaining sections of the flue pipe such that the overlap is about one and a quarter inches. Then put back the metal screws and ensure they are tight enough.