Water leaks: repair parts and repair methods

Water leakage is said to be the most common type of water-related problem in bathrooms / kitchens / toilets. This is probably because water is a lifeline that is used almost every day, and faucet parts that operate without a break deteriorate and wear out rapidly. So what parts are needed for repair and what procedure should be followed? This article will explain in detail.

Repair parts and repair methods necessary for water leakage

The parts used for faucets are consumables. Therefore, in most cases, the water leakage can be repaired simply by replacing the parts. Let's check the necessary repair parts and repair methods for each symptom and leakage area. This article will discuss the single faucet and the handle mixing faucet.

Water leakage from the base of the pipe

If water leaks from the base of the spout pipe connected to the faucet body (joint), the cause is that the packing at the turning part is damaged or the nut that holds the packing is loose. To solve this problem, you can replace the pipe packing and tighten the nut firmly.

Necessary parts

  • Pipe packing (U-packing, flexible pipe attachment packing)
  • Check the outer diameter of the pipe and use the appropriate size.

Repair method

  1. Close the water stopcock. (Water will not flow out even if it is not closed, but to make doubly sure)
  2. Loosen and remove the bag nut using a repair wrench or similar tool.
  3. Pull out the pipe and remove the old packing and ring. At this time, make sure to check if the packing is still inside the faucet.
  4. Install the new packing into the faucet body. At this time, install the packing with the grooved side facing the faucet body.
  5. Insert the pipe with the ring and nut set into the faucet body and tighten the nut. Be careful not to tighten the nut too tightly as it will make the pipe difficult to move.

Water leakage from the bottom of the handle

When using a mixing faucet with a handle that is twisted to release water, it is common for water to leak from the joint between the handle and faucet body. It is most likely that the packing inside the faucet handle is damaged, so replace it with a new gasket. Since this packing is in constant contact with the shaft, it is subject to severe wear.

Necessary parts

  • Faucet packing (triangular packing, cap packing, packing inside faucet handle)
  • Check the nominal diameter of the faucet (13 mm, 20 mm) and use the appropriate size.

Repair method

  1. Be sure to close the water stopcock.
  2. Use pliers or similar tools to remove the screw on the top of the handle that holds the handle in place. 
  3. Pull up the handle to remove it.
  4. Loosen and remove the bag nut, and replace the old packing and packing receptacle with a new one. It may be easier if you use tweezers or similar tools.
  5. Assemble in the reverse order of the previous step, bag nut → handle →  screws and you are done.

Water leakage from the end of the pipe

Water drips from the water outlet at the end of the pipe even though the handle is firmly tightened... This is most likely caused by damage to the frame (also called a krib) inside the faucet body. The frame is a part with a rubber seal attached to its shaft, and it is used to open and close the faucet and adjust the water volume by moving it up and down. Replacing the frame or the rubber packing of the frame will solve the problem. However, there are some types of faucets for which the rubber seal cannot be replaced.

Necessary parts

  • Faucet frame (krib)
  • Check the diameter of the frame and use the appropriate size (15 mm for general household use).

Repair method

  • Be sure to close the faucet.
  • Loosen the bag nut at the bottom of the handle using a repair wrench or similar tool.
  • Turn the handle counterclockwise and remove the upper part of the faucet.
  • The frame is located at the bottom of the spindle (shaft part). Use tweezers to remove it.
  • Insert the new nut into the spindle and set it on the faucet body while lightly pressing down on it. Follow the reverse procedure of the previous step to install the upper part of the faucet and you are done. Be careful not to tighten the bag nut too tightly, as it will make it difficult to turn the handle.

Water leakage from the faucet

If water is leaking from the mounting part of the faucet body (such as the wall of the sink, etc.), the sealing tape used to screw the faucet body into the plumbing may have deteriorated. Replace the tape with a new one.

Necessary parts

  • Sealing tape

Repair method

  1. Be sure to close the water stopcock.
  2. Use a faucet wrench to twist and remove the faucet body.
  3. Use a brush to clean the inside of the piping and the threads. At this time, if there is old sealing tape, dust, or rust left behind, it may cause water leakage, so be especially careful with the threads.
  4. Wrap new sealing tape around the mounting screw part of the faucet body. Hold the faucet body with your left hand and wrap the sealing tape clockwise 7-8 times while gently pulling the sealing tape with your right hand. (You can adjust the tightness of the tape by the number of wraps.)
  5. Complete by attaching the faucet body to the piping. Tighten the tape slowly in a clockwise direction. At this time, be careful not to turn it in the opposite direction, as this will damage the threads and cause water leakage.


After replacing the repair parts, open the water stopcock and check for water leakage. Each work itself is not so difficult, but you need to be careful.