Blocked drains are one of the most common and frustrating plumbing problems faced by both homeowners and businesses. While some blockages build up gradually over time, others happen suddenly and without warning. But what actually causes drains to block in the first place?

In this blog, we’ll break down the most common culprits behind blocked drains, how to spot the warning signs, and how to prevent them in future.

1. Grease, fat & food waste

In kitchens, grease and fat are among the biggest offenders. When poured down the sink, hot oils may seem harmless but as they cool, they solidify and stick to the inside of your pipes. Over time, this forms a thick, sticky build-up that traps food particles and leads to blockages.

Tip: Always wipe pans and dishes before washing, and dispose of fats in the bin not down the drain.

2. Wet wipes & sanitary products

Toilets are designed to handle human waste and toilet paper nothing more. Items like baby wipes, makeup wipes, cotton pads, nappies, and sanitary products don’t break down easily in water. Instead, they clog up pipework and cause serious blockages.

Tip: Stick to the rule. only flush the 3 Ps: pee, poo, and (toilet) paper.

3. Tree Roots

Roots are naturally drawn to moisture, making underground drainage systems a prime target. Even the tiniest crack in a pipe can allow roots to infiltrate, expand, and block water flow completely.

Tip: If you suspect root intrusion, a CCTV drain survey can confirm the problem quickly and help prevent serious damage.

4. Hair & soap scum

In bathrooms, hair and soap residue are two of the most common causes of slow-draining showers, sinks, and baths. Hair binds together with soap and other debris, forming clumps that gradually block your pipework.

Tip: Fit plughole guards to catch hair and clean them out regularly.

5. Foreign objects

It’s surprisingly common for small items like children’s toys, cotton buds, or even excessive toilet paper to get accidentally flushed or dropped into drains. These can cause sudden, complete blockages that may require professional removal.

Tip: Keep bathroom bins within reach to avoid the temptation to flush unsuitable items.

What To Do If You Have a Blocked Drain

Early signs include:

• Slow drainage
• Gurgling sounds
• Unpleasant smells
• Water backing up

If you notice these symptoms, don’t wait. The longer you leave a blockage, the worse it will get and the more expensive it may be to fix.

Our drainage specialists offer fast, affordable unblocking services using professional tools like high-pressure water jetting and CCTV cameras to diagnose and clear problems quickly.

Prevent it before it happens

• Avoid pouring fats or food waste down the sink
• Install drain guards in kitchens and bathrooms
• Never flush wipes or sanitary products
• Schedule routine maintenance or inspections if your property is prone to issues
  

Need help with a blocked drain?

Whether it’s a slow sink or a serious sewer issue, our team is on hand 24/7 to help. No call-out fees, fast response, and guaranteed results.