In 90% of cases, the leak is at the P-trap—that curved pipe that looks like a fancy U. It’s held together by two big plastic nuts. Don’t be scared; they’re designed to be unscrewed by hand. Try twisting them a little tighter first. Sometimes a leak is just a lazy nut that didn’t get a proper handshake.
If that doesn’t work, you’ll need to unscrew them, check the rubber gasket inside, and clean it. Over time, these gaskets get crusty with mineral deposits or just squish out of place. Wipe it clean, reposition it, and re-tighten the nut by hand plus a quarter turn with pliers. This solves maybe half of all sink drips. Celebrate that small win with a snack.
When The Pipe Itself Is The Traitor
Sometimes the pipe has a tiny crack or a hole. If it’s a metal pipe, you might see rust or a pinhole leak. Plastic pipes get brittle and snap if you look at them wrong. Don’t try to patch it with tape—I know you’re tempted, but that’s a scam that will fail at 3 AM. Suck it up and buy a replacement pipe from the hardware store (they’re like $5).
Leaking Pvc Pipe Under Kitchen Sink at Johnny Lopez blog
Bring the old piece with you to the store. The nice person at the hardware counter will help you match the size. And buy two new rubber washers while you’re there, just in case. It’s like buying socks—always good to have a spare.
