A leaking sink can lead to water damage, increased utility bills, and mold growth if not addressed promptly. Sink leaks can originate from various sources, including the faucet, supply lines, drain, or the sink itself. Identifying and repairing the issue quickly helps prevent further damage and ensures the sink functions efficiently.

1. Leaking Faucet:

• Worn-out washers, O-rings, or cartridges in the faucet can cause drips or leaks.

2. Loose or Damaged Supply Lines:

• Water supply lines connecting the faucet to the shutoff valves may develop leaks due to wear or improper installation.

3. Faulty Drain Assembly:

• Leaks can occur around the drain flange or P-trap due to poor seals, corrosion, or misalignment.

4. Cracked Sink Basin:

• Chips or cracks in the sink material can cause water to escape.

5. Improper Installation:

• Gaps or loose fittings in the plumbing can lead to water seepage.

1. Identify the Source of the Leak:

• Faucet: Look for drips from the spout, base, or handle.

• Supply Lines: Inspect for moisture around the shutoff valves or where the lines connect to the faucet.

• Drain Assembly: Check for leaks under the sink, around the P-trap, or at the sink drain flange.

• Sink Basin: Look for visible cracks or chips.

2. Turn Off the Water Supply:

• Shut off the hot and cold water supply valves under the sink.

• Open the faucet to release any residual water pressure.

3. Repair the Leak Based on the Source:

• Faucet Leaks:

• Disassemble the faucet and replace worn washers, O-rings, or cartridges.

• Tighten any loose components.

• For severe damage, consider replacing the faucet.

• Supply Line Leaks:

• Tighten loose connections at the faucet or shutoff valves.

• Replace damaged supply lines with new ones, using Teflon tape to ensure a watertight seal.

• Drain Assembly Leaks:

• Remove the drain flange and clean old plumber’s putty or sealant.

• Apply fresh plumber’s putty around the flange and reinstall.

• Check and tighten the P-trap connections, replacing washers or gaskets if necessary.

• Cracked Sink Basin:

• Seal small cracks with waterproof epoxy as a temporary fix.

• Replace the sink for larger cracks or structural damage.

4. Test for Leaks:

• Turn the water supply back on and run water through the sink.

• Check all connections and seals for drips or moisture.

5. Clean and Dry the Area:

• Wipe up any water and ensure the area under the sink is dry to prevent mold or mildew growth.

1. Regular Inspections:

• Periodically check supply lines, drain components, and the faucet for wear or damage.

2. Use Quality Materials:

• Invest in durable faucets, supply lines, and plumbing components to minimize future issues.

3. Avoid Over-Tightening:

• Tighten connections securely but not excessively to avoid damaging threads or seals.

4. Protect Against Freezing:

• Insulate pipes and fittings in cold climates to prevent freezing and bursting.

• If the leak persists despite repairs.

• For complex issues, such as hidden leaks or major structural damage.

• To replace a sink or faucet requiring significant plumbing modifications.

• DIY Repairs:

• $5–$30 for replacement washers, gaskets, or Teflon tape.

• $20–$100 for supply lines, drain components, or plumber’s putty.

• Professional Repairs:

• $75–$200 for labor and basic repairs.

• $200–$500+ for major repairs or replacements.

1. Prevents Water Damage:

• Stops leaks from damaging cabinets, walls, or floors.

2. Saves Money:

• Reduces water waste and potential repair costs.

3. Improves Hygiene:

• Prevents mold, mildew, and bacteria growth in damp areas.

4. Restores Functionality:

• Ensures the sink operates efficiently without leaks.

Fixing a sink leak is an essential maintenance task that protects your home from damage and keeps your plumbing system in good condition. Many leaks can be resolved with basic tools and replacement parts, but professional assistance is recommended for more complex issues or replacements.