The Most Common Causes Of A Blocked Sink

A blocked drain starts out as a minor problem, but when left untouched, it can escalate into a major problem. When a drain is clogged, the water drainage process slows, flooding can occur and in extreme cases, sewage is backed up resulting in a costly repair. Sink drains are well exposed to excess dirt, food waste, hair, soap and mineral build up. These four things are the most common source of your blocked household sink.


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While sinks are used to wash away unwanted dirt, they were not designed to wash away everything. You probably want to get excess dirt off yourself, clothes or plates, excess or large bits of dirt can build up and cause issues in your drain. To prevent this, shake off excess dirt before washing over the sink when possible.

Food Waste and Fat

Food waste should never go down the drain. Things such as teas leaves and coffee grounds do not break down, which is important to note down when it comes to using your waste disposal too. Greasy foods or oil solidify in the pipes, causing blockages. The best option for preventing a food waste blockage is to set up a composting pile for your food instead. Absorb excess oil or fat with a paper towel and chuck it in the compost, not down the drain.


A drain blocked with hair is one of the more difficult problems to fix. Often the hair binds with grease and any other sticky substance it comes in contact with, forming clogs in the drain and building up on the insides of the pipes. To prevent these clogs, a drain guard is recommended and should be checked regularly.


Similar to fat or oil down the drain, soap is a big culprit. How you may ask? Traditional soap bars are grease based, and when combined with minerals in water, a hard residue is formed - known as soap scum. This stains the fittings and clogs the pipes. Try switching to soap free washes and have your pipes pressure cleaned when doing so to remove any traces of build up.

Regardless as to whether your drain is blocked or not, there are always steps you can take to ensure your drain is running smoothly. Using a drain screen is an easy way to catch unwanted items before it’s too late. This will help catch unwanted things such as food scraps, hair and small household items. Drain screens are often available at your local hardware store.

It is a wise idea to give your drain a brief clean each weekly. This can be done by pouring a kettle of hot water down your sink drain, which melts away any grease or fat that may have collected in the pipes. Keeping drain remover, such as a granules clog remover, gel clog remover and/or foam clog remover on hand can be beneficial for when you need to act fast. If you are ever unsure or encounter an unknown problem, please contact a professional. For problems greater than a DIY fix, we offer professional services for drain blockage, drain repairs and general advice and inspection too.

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