Blocked drains are one of the most common issues faced by homeowners and businesses. Understanding the main causes can help you avoid costly repairs and keep your drainage system running smoothly. Here are the top 10 causes of blocked drains in County Durham—and how to prevent them.

1. Grease and Fat Build-Up

Pouring grease, fat, and oil down the sink may seem harmless, but it solidifies and sticks to pipes, causing serious blockages over time.
Prevention: Dispose of grease in a container and throw it in the bin.

2. Hair Accumulation

Hair can quickly clog bathroom drains, especially when combined with soap residue.
Prevention: Use drain guards to catch hair before it enters the pipes.

3. Wet Wipes and Hygiene Products

Even “flushable” wipes don’t break down properly and can lead to severe blockages.
Prevention: Only flush toilet paper—dispose of wipes in the bin.

4. Food Waste

Coffee grounds, food scraps, and starches can build up and restrict water flow.
Prevention: Scrape plates into the bin before washing.

5. Tree Roots

Roots can infiltrate underground pipes, causing cracks and blockages.
Prevention: Regular inspections and maintenance can catch this early.

6. Foreign Objects

Items accidentally dropped into drains can obstruct flow.
Prevention: Be mindful of what goes near sinks and toilets.

7. Soap Scum

Soap residue can harden and narrow pipes over time.
Prevention: Regular cleaning and occasional hot water flushing.

8. Poor Pipe Installation

Incorrect pipe gradients or poor workmanship can lead to recurring issues.
Prevention: Always use qualified professionals for installations.

9. Collapsed Pipes

Older or damaged pipes may collapse, blocking the system completely.
Prevention: CCTV drain surveys help identify structural problems early.

10. Mineral Build-Up

Hard water can leave mineral deposits that restrict flow.
Prevention: Periodic descaling and maintenance.

Need Help with Blocked Drains in County Durham?

If you’re dealing with slow drainage or recurring blockages, Northumbria Water & Gas Limited provides fast, reliable solutions. Our expert team can diagnose and resolve issues quickly using professional equipment.

Contact us today for expert help with blocked drains in County Durham.