How to Fix a Leaky Pipe Under Sink: A Step-by-Step Guide

A leaky pipe under the sink can be a frustrating and messy problem, but with the right tools and a little patience, you can fix it yourself. Whether the leak is coming from a loose connection, a cracked pipe, or a worn-out washer, this guide will walk you through the steps to identify and repair the issue. Below, we’ll cover everything from gathering supplies to testing your repair.Before you begin, make sure you have the following tools and materials on hand:

• Adjustable wrench
• Pipe wrench
• Plumber’s tape (Teflon tape)
• Pipe cutter or hacksaw
• Replacement pipes or fittings (if needed)
• Bucket or towel to catch water
• Flashlight for better visibility

Once you’ve gathered your supplies, follow these steps to fix the leak:

1. Turn Off the Water Supply: Locate the shut-off valves under the sink and turn them clockwise to stop the water flow. If there are no individual valves, you may need to shut off the main water supply to your home.
2. Identify the Source of the Leak: Use a flashlight to inspect the pipes carefully. Look for dripping water, corrosion, or cracks. Common leak sources include loose connections, worn-out washers, or cracked pipes.
3. Tighten Loose Connections: If the leak is coming from a loose nut or fitting, use an adjustable wrench to tighten it. Be careful not to overtighten, as this can damage the threads.
4. Replace Damaged Washers or Gaskets: If the leak persists, the washer or gasket inside the fitting may be worn out. Disassemble the connection and replace the faulty part.
5. Repair or Replace Cracked Pipes: For cracked pipes, use a pipe cutter or hacksaw to remove the damaged section. Install a replacement pipe or fitting, securing it with plumber’s tape or a coupling.
6. Test Your Repair: Turn the water supply back on and check for leaks. If everything looks good, dry the area and monitor it for a few hours to ensure the leak is fully resolved.

Preventing future leaks is just as important as fixing the current one. Here are some tips to keep your pipes in good condition:

• Regularly inspect under-sink pipes for signs of wear or corrosion.
• Avoid using harsh chemical drain cleaners, as they can damage pipes over time.
• Insulate pipes in cold areas to prevent freezing and cracking.
• Replace old or brittle pipes before they fail.

By following these steps, you can save money on plumbing repairs and avoid the hassle of water damage. Remember, if the leak is severe or you’re unsure about the repair, it’s always best to call a professional plumber.