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Published: 5/23/2025

How to Fix a Leaky Faucet Base of a Kitchen Sink Faucet?

Overview:

  • Repair Summary: This repair entails disassembling the faucet base to identify and replace the worn-out or damaged O-rings or gaskets causing the leak.
  • Estimated Time: The repair is estimated to take about 30 minutes to 1 hour for someone with basic plumbing experience.
  • Skill Level: This repair requires an intermediate skill level, involving basic plumbing tools and understanding.
  • Prerequisites: Ensure you have a clean workspace, and it's beneficial to have prior knowledge of basic faucet mechanics.
  • Expected Outcome: Upon successful completion, the faucet base should no longer leak, restoring the sink’s full functionality.
  • Safety Precautions: Before starting, turn off the water supply to the faucet. Wear protective gloves and eyewear to prevent injury from sharp edges or tools.

Tools Required:

  • Adjustable wrench
  • Basin wrench (optional)
  • Channel-type pliers (for removing old O-rings or gaskets)
  • Needle-nose pliers
  • Teflon tape
  • Replacement O-rings or gaskets (specific to your faucet model)
  • Flashlight (for better visibility under the sink)

Step-by-Step Repair Guide:

  • Turn Off Water Supply: Locate and turn the shut-off valves under the sink to cut off the water supply to the faucet. Open the faucet to drain the water from the pipes.
  • Disassemble Faucet Base: Use an adjustable wrench to loosen and remove the faucet base by unscrewing it from the sink. You may need a basin wrench if there's limited space.
  • Identify Leak Source: Inspect the base for worn-out O-rings or gaskets. Use a flashlight for better visibility.
  • Remove Old O-Rings/Gaskets: Carefully use channel-type pliers to remove the old O-rings or gaskets. Take note of their position and orientation.
  • Clean Area: Use a cloth or brush to clean the area where the new O-rings or gaskets will be installed. Ensure there’s no debris or old material left.
  • Install New O-Rings/Gaskets: Apply a small amount of plumber's grease to the new O-rings or gaskets and install them in their correct positions. Ensure they are properly seated.
  • Reassemble Faucet Base: Reattach the faucet base to the sink, tightening it securely but avoiding over-tightening which can cause damage.
  • Test for Leaks: Turn the water supply back on and check for leaks by running the faucet for a few minutes.

Estimated Cost:

  • Replacement Parts: $5-$20 (depending on the faucet model and type of O-rings or gaskets needed)
  • Tools: $20-$50 (if you don’t already have basic plumbing tools)
  • Labor Cost: If hiring a professional, expect to pay $50-$150, depending on your location and the plumber’s rates.

Tips and Warnings:

  • Practical Tips: Regularly check and maintain your faucet to prevent future leaks. Applying plumber's grease during reassembly can help extend the life of new O-rings or gaskets.
  • Warnings: Be cautious when handling sharp tools and ensure the workspace is well-lit to avoid accidents. Over-tightening can damage the faucet or sink, so tighten fittings carefully. If you're not comfortable with DIY repairs or if the leak persists after attempting the fix, consider consulting a professional plumber.

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