9 Reasons Why the Sink Is Leaking
Nothing can put a homeowner in a bad mood as fast as a plumbing problem. The situation can be even more stressful if you don’t know why your sink leaks. Seeing water pooling under the sink with no obvious cause can be frustrating. A leaking sink is, at least, a nuisance that will require your time and effort to fix. At worst, though, it could signal a major, costly problem quickly becoming a big headache.
To understand how worried you should be about your leaking sink and determine how to fix it, you must start by investigating possible causes. Here are some of the most common reasons sinks leak.
Faucet Leak
A faucet leak can appear in a few different places and can have a couple of different causes. You might notice puddles of water forming on top of your sink when you turn on the faucet. Your faucet may drip without end. A less obvious faucet leak, however, can appear under the sink.
If your faucet is the culprit of your plumbing problem, you’ll want to check for and immediately replace worn gaskets or failed washers. If this is your issue, then your leaking sink will be solved.
Loose Water Supply Connection
Your kitchen sink has two or three water supply connections. One is for hot water, one is for cold water, and sometimes, one is for a dedicated sprayer. A leak can occur in any of these three connections due to excessive stress, pressure, and movement.
Is the area under your sink completely soaked? A constant leak under the sink can signal a loose water supply connection.
Try tightening the connection to fix the leak. If this doesn’t help, you might need to replace a failed gasket or a corroded part. Call a plumber for help if necessary.
Drain Leak
Check your sink’s drainage plumbing pipes for signs of wear and tear. Drains are sealed with putty to prevent leaks. However, this putty can start to dry out or thin out on older drains. This, in turn, can cause the drain to leak.
It’s a good idea to call a plumber to replace the drain if this is the culprit of your sink leak.
Corroded Valve Seat
Your sink’s faucet and spout connect to a compression mechanism. It’s connected to a valve seat. This valve seat is prone to corrosion if faced with excess water. This corrosion will break down the material, causing a leak.
Prevent corrosion before it becomes a problem by cleaning it regularly. If you’re past prevention, you must replace your corroded valve seat to stop the leak.
Failed O-Ring
An O-ring is a tiny disc with a simple job: It is attached to the stem screw to hold your faucet handle in place. How can such a small part of your sink system cause such a big problem? If this small disc is worn out, loose, or otherwise damaged, it can cause your faucet to leak.
You’ll know this is the cause of your leaking sink if you see water pooling around your faucet handle. You must replace your O-ring to stop your leak if this is your issue.
P-Trap Clog
Under your sink, you’ll see a curved part of a pipe. This is known as your P-Trap. The purpose of the P-Trap is to prevent bad smells in your drain.
If a clogged P-Trap is your plumbing issue, you probably won’t immediately see a leak. Over time, though, the clog will stop water from draining properly, which in turn will cause a leak.
The good news is that you must clear the clog, and your sink should stop leaking.
Sink U-Bend Leak
The Sink U-bend is also known as the waste trap and is a critical part of the waste system. This part can become blocked or be subjected to wear and tear. What’s more, it’s connected at both ends with rubber washers. If these washers fail, a leak can occur. You will likely smell a problem before you see a sink leak if this is your problem.
High Water Pressure
If you’re not seeing any signs of wear and tear around your sink and can’t locate the cause of your sink leaking, your next step should be to contact a plumber to test your water pressure.
If excessively high-water pressure hits your pipes, it can cause problems. At best, you’re dealing with an occasional leak right after you turn on the water. At worst, your pipes can burst. It’s important to get this looked at as soon as possible if you think it could be a potential cause.
Sink Overflow Leak
While a sink overflow leak is not that common, it is commonly missed among homeowners looking for a cause of a leaking sink. If you’ve eliminated all other possibilities, it’s a good idea to consider your overflow pipes a likely culprit. A sink overflow leak will be gradual and occasional rather than constant.
