How Much Does It Cost To Unblock A Sink (UK – 2025)?
SUMMARY
Which Trade would normally do this: Plumber
Average time to unblock a toilet: 1 to 2 Hours
Average cost to unblock a toilet: £80 (Range of £50 – £150)
- Material Costs 10%
- Labour Costs 90%
- Disposal Costs 0%
Introduction: How Much Does It Cost To Unblock A Sink (UK)
The cost to unblock a sink is relatively predictable at about £80. Most of that charge will be callout/labour. It can get more costly if the blockage is not straightforward.
Let’s take a more indepth look and find out why sinks block, what you can do about them, and when you might to call in an expert.
Why Do Sinks Block
Whether it’s a kitchen sink, or a bathroom sink, there are generally just a handful of reasons why they become blocked. these are
Accumulation of Debris
This is the most common reason for sink blockages. Over time, various materials such as hair, food waste, soap scum, or even small objects can accumulate and cause a blockage in your sink.
Grease or Fat Buildup
In kitchen sinks, fat or grease can often be a culprit. When hot grease or fat goes down the drain, it can solidify as it cools and stick to the pipes, causing a blockage over time.
Pipe Design or Installation Issues
If a pipe is not installed properly, it can lead to a blockage. For example, pipes with inadequate slopes may not allow waste to flow out as expected. Furthermore, issues such as pipe corrosion or misaligned pipes can also cause obstructions, preventing proper water flow and leading to a blocked sink.
More Serious Blockage Further On
In rare cases your sink may become blocked due to a pipe blockage further on away from the sink itself.
Things You Can Try To Unblock Your Sink Before Calling A Plumbe
There are several steps you can try to unblock a sink before resorting to calling a plumber:
Boiling Water
The easiest and least expensive method to try first is pouring boiling water down the drain. This can often dislodge simple blockages caused by fat or soap. Pour the water carefully to avoid splashing onto your skin or backing up and overflowing.
Plunger
Using a plunger can create pressure that may dislodge the blockage. Make sure there’s enough water in the sink to cover the base of the plunger, then plunge vigorously. Every few seconds stop and see what happens. You may see bubbles or hear gurgling noises. Both of these are possible signs its beginning to work.
Baking Soda and Vinegar
If hot water and plunging aren’t effective, you can try using a mixture of baking soda and vinegar. Pour half a cup of baking soda into the drain, followed by half a cup of vinegar. Wait 15-20 minutes and then rinse with hot water.
Hand Auger or Plumber’s Snake
If the clog persists, you may need to use a hand auger or plumber’s snake. This is a long flexible metal rod that’s pushed down the drain to dislodge the blockage. Be careful not to get the rod stuck or damage your pipework.
Drain Cleaner
If none of the above methods work, you can try a chemical drain cleaner as a last resort before calling a plumber. Be sure to follow the instructions on the product carefully, as these chemicals can be hazardous.
Remember, if the blockage continues after trying these methods, it’s important to call a professional plumber to avoid damaging your pipes.
