Drains are an essential part of any domestic property. They help to remove unwanted water and waste, as well as help other services such as the toilets and sinks to work properly. However, they can sometimes become blocked which can be very inconvenient and costly if left untreated. The most common causes of drain blockages are hair, dirt, leaves and tree roots but there are many other reasons too.

Drain blockages are common, and it can be a big headache if you have a blocked drain.

Drain blockages are common, and it can be a big headache if you have a blocked drain. You may not be able to use your sink or bathtub, and the smell from the blocked drains might make your home smell bad too.

Here are some of the main causes of a blocked drain:

Blocked Drains from Hair

Hair is a common cause of drain blockages. It can tangle, clog up the drain and even get caught in the drain cover or pipes.

Hair is especially problematic if it’s long and hangs down in your sink or bathtub. If you have long hair, consider tying it back when washing dishes or taking baths so that it doesn’t get trapped in your plumbing system and cause problems later on.

Blocked Drains from Plants and Dirt

Plants and dirt can cause blockages in your drains. This is because they build up in the drain, which blocks water from flowing through it. If you have a pipe that is blocked by plants and dirt, then you need to use a snake or high-pressure water jetter to remove them. However, if it’s an underground pipe that has been blocked then we would recommend using our professional drainage services which will be able to help unblock any pipes within your property quickly and efficiently.

Blocked Drains from Broken Pipes

The most common cause of a blocked drain is broken pipes.

As pipes age and corrode, they become more susceptible to cracking or breaking under pressure from water flow, which can cause your drains to become blocked.

Another common reason for a drain blockage is limescale buildup in the pipe. This occurs when minerals like calcium build up on the inside of your pipes over time and harden into rock-like formations that clog up your drains easily when they get wet again (like after you flush your toilet).

An increase in water pressure can also cause cracks and breaks in old plumbing systems, making them less able to withstand increased pressure levels without breaking down completely – so if you notice any unusual noises coming from your drains while running hot taps or washing machines, this could be why!

Blocked Drains from Foreign Objects

Foreign objects can get stuck in your drain, causing it to block. These include hair, coins and food waste. Here are some tips on how you can prevent this from happening:

Use strainers on all drains to catch any large pieces of dirt or hair before they reach the sewerage system.

Clean out sinks regularly by using a plunger or plumber’s snake (a flexible cable), which will loosen any blockages caused by food scraps like eggshells and potato peels.

Avoid putting grease down the sink as it will harden over time, making it difficult for water to pass through the pipes under pressure when you turn on your taps next time!

Blocked Drains from Toiletries

Toiletries can clog drains. Toiletries, including hair, soap and toothpaste are not biodegradable. If you have a blocked drain from toiletries the build-up has likely been caused by using too much product in one go or not clearing the sink after use. 

The best way to prevent this is to always use less than you think you need when washing your hands or brushing your teeth and always wash down the sink after use so that any excess product doesn’t sit there for long periods building up into blockages.

Blocked Drains from Heavy Rain and Storms

Heavy rain and stormwater drains can become blocked with leaves, dirt and other debris. This can cause flooding in your home as the water cannot drain away. We will clear the blockage and prevent further problems by using high-pressure water jets to unblock your drain pipes.

Fat, oil, and grease

Fat, oil and grease are the three most common causes of blocked drains. Fat is a byproduct of cooking, while oil can be used in frying food and grease is used to lubricate machinery.

Fat, oil and grease are solids at room temperature but they become liquid when heated up by being cooked or fried in a pan. When the fat cools down again it solidifies inside your pipes causing them to become blocked and unable to drain away any water that enters them after this point.

Blocked Drains from Bad Pipe Installation

Bad pipe installation is one of the most common causes of drain blockages. Bad pipe installation can result in blocked drains due to:

The pipes are installed too close together, resulting in smaller gaps for drainage water to flow through.

Angled pipes that do not direct water towards the main drain. This can cause debris to build up at an angle, causing a blockage further along the line and potentially causing flooding if left untreated for too long!

Venting pipes (which allow air into your drainage system) are not being included in new builds or renovations, which can cause pressure on your sewerage system – leading to serious problems down the road!

Blocked Drains from Poor Water Flow

The flow of water is a crucial part of the drainage system. The main reason for this is that it helps to keep sewage and other waste products moving through your pipes, which prevents blockages from forming.

The environment also benefits from good water flow because it ensures that contaminants aren’t left behind but instead move on through the network until they reach treatment plants or septic tanks. If there is poor flow in your drains, then this can lead to serious problems such as flooding or even sewage backing up into your home!


Disintegration is the most common cause of drain blockages and can be caused by corrosion, wear and tear or freezing. When pipes disintegrate they break down into smaller pieces which then clog up the drainage system.

Although it may seem like an easy fix to simply unblock your drains yourself with a plunger or snake, this will not solve the problem long-term as it does not address any underlying issues such as corrosion or wear in your pipes.

Cat litter

Cat litter is a common cause of drain blockages. This is because it’s made from clay, which isn’t biodegradable and can cause harm to the environment and your health. As well as being unsightly, cat litter can also be harmful to your household plumbing system as it builds up over time in your drains. Avoid using clumping or scented litters (which tend to stick together) as they’re more likely than non-clumping varieties to cause problems when flushed down the toilet or washed away by rainwater seeping into drains outside homes with no gutters or downpipes installed properly.

Woking Drainage Services will give you a fast response with our specialist equipment to clear your blocked drains. We have a 24-hour emergency response service, so if you find yourself with a blocked drain at any time, day or night, we are here for you. Our experts are fully trained and qualified to clear any blockages and provide an expert solution for all of your drainage problems.

In a nutshell

We hope that this blog has helped you understand some of the common causes of blocked drains and how you can prevent them from happening. We also want to reassure you that if your drain does get blocked, our specialist team will be able to clear it quickly and efficiently with our state-of-the-art equipment.

Don’t let blocked drains disrupt your life. Contact Woking Drainage Services for quick and efficient solutions to all your drainage problems.