How to Fix a Split Galvanized Metal Pipe


Galvanized pipe deteriorates from the inside out as it ages and becomes corroded. In most cases, this indicates that the pipe has already sustained significant damage before the leak becomes apparent. Although galvanised pipe hasn’t seen widespread usage in domestic plumbing systems since the 1940s, there are still numerous homes that have it installed. If there is a visible leak forming in your galvanised pipe, there is a good possibility that the pipe has already developed a significant amount of corrosion. Temporarily stopping the leak with a repair clamp is possible, but in the long run, the pipe will have to be replaced.

  1. Determine where the pipe has split. Use a pipe repair clamp made of stainless steel to fix a tiny crack in the pipe. To remove the water from the pipe, turn off the water supply and then open a faucet. Utilizing a putty knife, scrape away any rust and corrosion that has accumulated in the area surrounding the leak. Utilizing a damp towel, thoroughly clean the area. After the pipe has been dried, choose the clamp that is adequate for its size. Wrap the clamp over the pipe while ensuring that the rubber gasket completely covers the crack in the pipe. Utilizing an adjustable wrench or nut driver, shut the clamp by applying pressure, and then continue to tighten the nut. Start the water running as you check for any leaks. Replace a broken portion of threaded galvanised water pipe by first cutting out the damaged area using a reciprocating saw. This will allow you to replace the broken part. Two separate cuts need to be made: one several inches away from the threaded connection, and the other at the threads themselves. Do this at both ends of the section. Take out the piece of the pipe that is damaged. While one pipe wrench is used to hold the remaining pipe in place, the second pipe wrench is used to remove the connection. After cleaning the threads, put some thread compound on them. Repeat the operation on the other end, beginning with screwing on a female PEX fitting and ending with tightening it with a wrench. After taking the necessary measurements, cut a piece of PEX pipe to length, and crimp it into the fittings.

  2. After cutting off the damaged piece of the galvanised drainpipe using a reciprocating saw, you may then replace the section of the drainpipe that was damaged. Cutting close to or directly through the threads is not required. If there is any PVC pipe in the line that is already there, cut the galvanised pipe back to where it was. Take the damaged pipe out of service. Put a rubber coupler for repairs onto each of the severed ends. Take the necessary measurements, then cut a piece of PVC pipe to size. After positioning the PVC pipe where it needs to be, slide it within the couplings. Utilize a wrench or nut driver to pull the coupling clamps in closer together.

  3. Replace as much of the galvanised pipe in your plumbing line as you can with PEX or PVC pipe after you have removed as much of the galvanised pipe as feasible.

    Things You Will Need

    • 2 pipe wrenches

    • Adjustable wrench

    • Nutdriver

    • Stainless steel repair clamp

    • Reciprocal saw

    • 2 female PEX adaptors

    • PEX pipe

    • Crimping tool

    • PVC pipe

    • 2 rubber repair couplings

    • Pipe thread compound


    It is easier for a galvanised drainpipe to develop a significant split than it is for a water pipe since the drainpipe is not under pressure and the split may not be immediately spotted.

    In order to remove a coupler that has rusted on, you may either heat it with a torch or spray it with lubricating oil.

    Because the pipe will continue to corrode, a repair clamp is simply a short-term solution to the problem.


    A repair clamp is only a temporary fix because the pipe will continue to corrode.