How to Replace Galvanized Iron Pipe and Fittings Part 1

What You'll Need
Cutting saw, or snap cutters
Pipe wrenches

If you have a galvanized iron pipe with fittings in your home, then you may be unsure how to replace it. Most home improvement manuals do not deal with the handling of galvanized iron, and while it is a durable and hard wearing item, it is less well known than PVC piping. In the first part of this guide to replacing your galvanized iron pipe and fittings, you will learn how to remove and replace corroded fittings, and a length of pipe between two fittings, cutting through a pipe section, and how to remove that pipe, and then how to take off corroded fittings.

Step 1 - Shutting off the Water

In order to perform this task correctly, you will have to shut off the water supply to that area of the pipe system. If you do not have a shut off valve nearby to the galvanized iron pipe, then you should certainly shut off the mains supply, which will be located outside the house. Run the water in upstairs and downstairs taps until the water is emptied from the supply pipes and drains. Once the water is gone, you will then be free to begin removing the corroded galvanized iron pipes.

Step 2 - Cutting off Corroded Pipes

If you are having to remove a length of corroded pipe between 2 connections, then you should first use your saw to cut down the section of pipe. If you don't want to remove a fitting at this point, cut the pipe around 2 inches from any fitting. You should then take your pipe wrenches, and apply one pipe to the fittings. Put the second pipe wrench onto the pipe itself, and holding the wrench over the fitting, turn the other until the pipe starts to come away. You can alternate hands which are being used to turn the wrench from time to time, as it is a rather hard job.

Step 3 - Cutting Off Corroded Fittings

Once the pipe has been removed, then you can try and get rid of any corroded fittings at the same time. Cut the pipe which is jointed to the fitting using your saw, and then take your pipe wrenches, and place one on the pipe behind the cut, and the other on the top of the fitting. Turn the wrench holding the fitting, while keeping the pipe in one place with the other wrench. Turn the fitting until it comes away from the pipe.

Step 4 - Disposing of the Corroded Fittings

Once you have removed the fittings, you will need to take them away from the pipe while you are replacing them with some more pipe work. You can take any of the metal pieces you have removed, and offer them to a scrap dealer, or to a plumber who restores old pieces of pipe. They can also be thrown away in the garbage if you have no other alternative.