Leaking water under the sink can be caused by a number of problems. At Terry’s Plumbing, we encounter leaks under the sink all the time, but find that the reasons behind these problems can be varied. In this post, we’ll cover some of the most common causes of water leakage under the sink and suggest solutions that can help.
The first thing to determine is where the leak is coming from. Remove everything from underneath the sink and dry the area out. Try to discover the source of the leak; this can be done by turning the water on to see the seepage, letting the drain backfill somewhat or by leaving a few paper towels underneath the sink to determine the location. Now let’s talk about the places where the sink is leaking.
Looking under your sink, you’ll see multiple potential sources for a leak.
Often the source of the leak is a loose connection between a line and a valve. To tighten the connection between a line and a valve, use one wrench to hold the valve and use a second wrench to tighten the compression fitting. If the connection continues to be loose, this could be a sign of dirt or sediment in the pipe around the fitting. To clear out the dirt, turn off the water supply and disconnect the supply line. Clean the fitting with a cloth, line the fitting with Teflon tape, then reattach.
If you determine that the source of the leak is a connection around the drain line P trap, use a wrench to tighten metal fittings or use your hands to tighten plastic fittings. If this doesn’t work, detach the pipes and clean them out. Line the joint with Teflon tape, then reconnect. Water will be trapped in the P trap, so you’ll need a bucket on hand to catch what comes out of the pipe.
If you’ve tried everything suggested above and you haven’t been able to find the source of the leak or fix the leak, this is a good time to get professional help. At Terry’s Plumbing, we help people just like you to maintain their home’s plumbing and avoid costly disasters. If you live in or around Pittsburgh and need help with your plumbing, or if you have a leak you just can’t seem to fix, contact us today. We can help you determine the source of your problem and can also make repairs.