Leak Under Bathroom Sink Compression Nut

This usually stops the leak.

Leak under bathroom sink compression nut.

The compression nuts holding a sink trap to the tailpiece and waste arm are designed to be hand tightened and when you do it properly the trap is watertight. The faucet works great but the drain pipe is leaking under the sink. The compression nut the compression ring and the compression seat. Use light steady pressure so you don t damage the water lines.

So what specifically causes a leaky compression fitting under your sink. Tighten the packing nut on the toilet shutoff valve one eighth turn clockwise to try to seal a leak around the nut. If the leak does not stop once the first valve is switched off is another line that is leaking. Tighten the packing nut.

Once you know where the leak originates you can repair or replace the defective part. The leak is coming from where the plastic nut on the drain pipe meets the bottom of the bathroom sink. Also make sure the pipe or tube goes straight into the fitting. Unscrew the compression nut and slide it back along the pipe.

When one of these pieces becomes worn broken or wasn t put on properly you ll have a leaking problem on your hands. A compression fitting consists of three parts a compression nut a compression ring and a compression seat. Decide which side of your faucet is dripping closing the water supply valves one at the same time. Wrap cloth or masking tape on the plier s jaws to protect the nut s finish.

After determining which side is leaking switch off both the supply valves. A compression fitting is a kind of coupling and has three distinct parts. When you open up the cabinet under your bathroom sink and see water chances are good that you have a leak. Part of knowing how to fix a leak in a bathroom sink is figuring out exactly where the leak is coming from.

If it s cracked or the threads are damaged replacing the nut may stop the leak. I installed a new bathroom faucet and it came with a new drain pipe and sink drain outlet flange. How to seal leaks around compression fittings for copper water pipes. It is leaking down into my bathroom cabinet and getting everything wet.

If the fitting leaks after you turn on the water try tightening the nut an additional one quarter turn. Misalignment will cause a leak.