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Kitchen Sink Won't Drain Not Clogged: Troubleshooting Solutions

June 8, 2023

Kitchen Sink Won't Drain Not Clogged: Troubleshooting Solutions

Having a kitchen sink that won't drain can be incredibly frustrating. You may assume that the problem is a clogged drain, but what if you've tried everything and the sink is still not draining? Don't worry; there are several other potential causes and solutions to explore before calling a plumber. Here are some troubleshooting tips:

Check the Garbage Disposal

If your kitchen sink has a garbage disposal, it's possible that the unit is preventing your sink from draining. Turn off the power to the disposal and check for any clogs or debris that may be blocking the blades. You can also try resetting the disposal by pressing the reset button located on the bottom of the unit.

Inspect the Pipes

The problem may be a clogged vent pipe or drainpipe. Check both the P-trap and the main drain line for obstructions that could be preventing water from flowing through. Use a plunger or a plumbing snake to clear any blockages that you find.

Look for Air Locks

If you've ruled out clogs and blockages, an airlock could be the issue. Run water until it fills the sink, then quickly turn off the faucet. At the same time, use a plunger to create suction to help clear out any airlocks in the pipes. This can help water flow freely again.

Try Boiling Water and Baking Soda

If the problem is due to grease buildup, try pouring boiling water down the drain, followed by half a cup of baking soda and a cup of vinegar. Let this sit for 5 to 10 minutes before flushing the drain with hot water again.


A kitchen sink that won't drain can be a frustrating problem to deal with. However, with a few simple troubleshooting tips, you may be able to fix the problem without calling in a professional plumber. If none of these solutions work, it's time to call in a plumber who can diagnose and fix the problem safely and effectively.


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