Why water does not drain from the bathroom sink: possible causes of blockages


Why Is My Bathroom Sink Not Draining?

It sounds like you’ve identified several potential reasons why your bathroom sink might not be draining properly. Let’s break down each possibility:

Matted and tangled hair in the plughole or pipes: Hair can easily accumulate in the sink drain over time, especially if it’s not regularly cleaned out. This can create a blockage that prevents water from flowing freely.


Build-up of soap scum: Soap residue can gradually accumulate in the pipes, reducing the diameter of the pipe and impeding water flow. Over time, this build-up can become significant enough to cause a blockage.


Small objects stuck in the pipes: Sometimes, small objects like jewelry or bottle caps can accidentally fall into the sink drain and become lodged in the pipes, causing a blockage.

Poor installation of plumbing and/or piping: If the plumbing or piping in your bathroom was not installed correctly, it could lead to drainage problems. This could include improper slope or alignment of pipes, which can impede the flow of water.

Blocked drains: External factors such as storms or heavy rainfall can lead to blocked drains, causing water to back up in your sink. Even if the pipes appear clear of any obvious blockages, the main drain outside your home could be obstructed.

To address these issues, you can try several steps:

Clean the plughole: Remove any hair or debris that may be clogging the drain using a drain cleaning tool or a bent wire hanger.

Use a drain cleaner: A commercial drain cleaner can help dissolve soap scum and other organic matter that may be causing a blockage.

Check for small objects: Use a flashlight to inspect the drain for any small objects that may be stuck. You may need to use needle-nose pliers to remove them.

Consider professional help: If you suspect that the issue is due to poor installation or a blocked main drain, it may be best to contact a plumber for assistance.

By addressing these potential causes, you should be able to improve the drainage of your bathroom sink.

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