How much work is it to replace the exhaust vent pipe of a natural gas appliance such as a water heater?

If the appliance is in the utility closet of a one-story A-frame house (on the main floor, not basement) and the vent pipe goes straight up to the roof, what tools do you need to replace the vent pipe? How heavy is it likely to be?|||thats pretty easy. The hardest part is getting to the mounts for the vent that may be in the wall and could be set every few feet. The vent sections are not that heavey, but if you try to move the whole thing all at once, you may have trouble by yourself. For the tools, you will need a drill, some mounting strips (i used the metal plumber mounts. it comes in a spool and you just cut off what you need as you need it, mount with a few screws and attach to your vent - a cutter like tin snips if you use this type of mount) Most of the time, the vent sections have a linking system to let the sections pop together, but check and make sure; you may need a gromit gun if the sections to self-attach. Thats the basics for hanging the vent, but you may need more tools if you have to dig into your wall. If thats the case, you will need some tools for cutting and repairing drywall / plaster. Take special care attaching to the water heater. Any leak there could leave you with a carbonmonoxide problem.