How do I fix a leaking water supply line?

If you have a leaking water supply line, it’s important to address it promptly to prevent further damage. Here’s a step-by-step guide to help you fix a leaking water supply line:

  1. Shut off the water supply: Locate the shut-off valve that controls the water supply to the affected line and turn it off. If you can’t find a specific shut-off valve for that line, you may need to shut off the main water supply to your home.
  2. Drain the line: To avoid excess water leakage, open a faucet connected to the affected water supply line and allow the water to drain out completely.
  3. Inspect the connection: Examine the connection where the water supply line meets the fixture or appliance. Check for any visible signs of damage, such as cracks, loose fittings, or worn-out washers.
  4. Tighten fittings: If the connection appears loose, use a wrench or pliers to gently tighten the fittings. Be careful not to overtighten, as it can damage the fittings or cause them to crack.
  5. Replace washers: If the leak is coming from a compression fitting, it may be due to a worn-out or damaged washer. Disassemble the fitting, remove the old washer, and replace it with a new one of the same size and type.
  6. Apply plumbing tape or thread sealant: For threaded connections, it’s recommended to apply plumber’s tape or thread sealant to ensure a tight and leak-free seal. Wrap the tape clockwise around the threaded portion of the fitting, overlapping the tape as you go. If using thread sealant, apply it to the male threads before tightening the connection.
  7. Replace the supply line: If the leak persists or the supply line itself is damaged, it may need to be replaced. Measure the length of the existing supply line and purchase a suitable replacement. Follow the manufacturer’s instructions for installation, ensuring proper fittings and tight connections.
  8. Turn on the water supply: Once you have addressed the leak, turn on the water supply to the affected line or the main water supply to your home. Monitor the connection for any signs of leakage. If there are no leaks, proceed to the next step.
  9. Test the repaired line: Run water through the repaired supply line and check for any leaks. Ensure the connection remains tight and secure under normal water pressure.

If you’re uncertain about any aspect of fixing the leaking water supply line or if the leak persists despite your efforts, it’s advisable to consult a professional plumber for assistance. They have the expertise and tools to diagnose and repair plumbing issues accurately and safely.

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