How to Repair Tube Compression Fittings

Tube compression fittings can usually be found on any pipe under a sink or in an air conditioning unit (among other things). Before the use of copper pipes the pipes were connected by threaded ends. Once copper began being used soldering became the method of attaching pipes. This was not something that even the best handyman would attempt. Tube compression fittings were created so that two pipes could be joined together without having to solder them together or even having to screw them together. The tube compression fitting can be used to repair a burst pipe quickly. When a tube compression fitting fails it can start an entirely new list of problems. The article below will explain how you can repair the tube compression fitting, which is much easier than you think.

Step 1 – Stop the Water

Trying to repair any damaged tube compression fittings without the water shut off would be like running up a hill with weights. It is not impossible to do but it will take time. Turning the water off is not a difficult task. Find the knob near the back of the sink, toilet or water heater and turn it to the right to turn it off. You can also do the same thing at the main source of the water.

Step 2 – Replace the Ferrule

Essentially, tube compression fittings are made up of three parts. Once the fitting is removed you will be left with the bare pipe which has two threaded ends. There will be a small component furthest from the end of the tubing. This is the ferrule. To remove it you will need to first remove the current tube compression fittings by unscrewing the nut. Place the pipe cutter just above the ferrule and then cut through the tubing which will remove the piece of the pipe along with the ferrule. Place the new ferrule on the pipe and then put joint compound on pipe and ferrule. Slide the new pipe into the ferrule until it stops.

Step 3 – Tube Compression Fitting Installation

Tube compression fittings are installed on a pipe or tube behind the ferrule. Place the new fitting and then slide it until it hits the ferrule. Continue pushing the tube compression fitting along the tubing so that it and the ferrule move down toward the valve or hub of the fitting. Wrap the threads of the tubing with the plumber’s silicone tape. This helps to prevent leaks. You can then twist the compression fitting on to the threaded end of the tubing. Hold the fitting in place with a wrench while you tighten the nut with the second wrench. Be careful to not tighten the nut too much.

Step 4 – Check for Leaks

Once the compression fitting is tight you can then turn the water back on. Check for any leaks at the fitting and if there are some present then tighten the nut until the leak stops.