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How to Unblock a Sink

It can be costly to call in a plumber to tackle the jobs that you can easily do yourself, and unblocking a sink is just one job that you can learn how to do. So, to help you out and make things easier, we’ve created this step-by-step guide on how to unblock a sink.

The drain in the bathroom sink can easily become clogged with hair and soap scum, but the good news is that it only takes a few minutes to remove the blockage and get the water draining away freely again without using any harsh chemical cleaners.

What you’ll need to unblock a sink

Unblocking a sink with a plunger

Step 1 – If the water is not draining away in the sink, take a plunger and position it over the plughole, making sure to hold a rag against the overflow.

Step 2 –  Keeping the overflow covered, move the plunger up and down. This will create a vacuum, which should dislodge the blockage.

Step 3 – If the plunger method doesn’t work, then you will need to remove the u-bend underneath the sink. Place a bucket underneath to catch any water.

Step 4 – Once you’ve removed the u-bend, remove any debris that have caused the blockage and refit once done.

Step 5 – If there’s no blockage in the u-bend, you will need to dig a little deeper. So, unscrew the main part of the trap to allow access to the waste pipe.

Step 6 – Use an auger and push the flexible wire down into the waste pipe as far as it will go, then use the handle to wind the wire. This will twist the wire, which should dislodge the blockage and break it up.

Step 7 – You can then reassemble the underneath of your sink, ensuring all connections are tightened up before running the water to see if the blockage has cleared.

Unblocking a sink with baking soda and vinegar

You may also want to try using baking soda and vinegar to unblock your sink…

Step 1 – Pour boiling hot water down the drain.

Step 2 – Add 250ml of baking soda, followed by 500ml of hot water, and leave to sit for a few minutes.

Step 3 – Next, add 250ml of vinegar and allow the two to react below the surface of the drain.

Step 4 – Cover the plug hole and leave for 5-10 minutes.

Step 5 – Flush through one more time with boiling water.

If you have tried both of the above ways to unblock your sink and not had any luck, then we recommend calling out a professional plumber to investigate further.

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Categories: Help & Advice
Liz: Liz has a passion for home decor, interior design and renovation projects.