Ever notice it’s damp under the kitchen sink? Or notice puddles of water? Do you leave a bucket to catch leaking sink water? You may have a leak in your supply line. Supply leaks can go unnoticed since they are in the back of cabinets. The water leak can run down pipes into the floor, subfloor, sink base, and framing.

The Signs:

• Puddles, dampness, or water stains
• Stains on ceiling below

The Source:

• Dab shutoffs and connections with a paper towel and look for wet areas
• Run the dishwasher and check for leaks under it.

The Fix:

• If the valve stem or shut off valve drips, tighten the packing nut. If the leak doesn’t stop, replace the valve.
• For other leaks at the shutoff valve or at the faucet, tighten the compression nut first. If that doesn’t stop the leak, disassemble the fitting, coat the ferrule or gasket with Teflon joint compound, and reassemble the connection.

These tips should help identify leaks caused by the supply line. If the issue persists, or just unsure, have the professionals at All Good Plumbers help you today.