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    June 12, 2026
    David L.
    4 min read

    The 7 Most Common Causes of Blocked Drains in London

    The 7 Most Common Causes of Blocked Drains in London

    A blocked drain is unhygienic, disruptive, and can cause foul odors to permeate your home. Understanding what causes blockages is the first step to preventing them.

    1. Fat, Oil, and Grease (FOG)

    Pouring cooking oil down the kitchen sink is the number one cause of drain blockages. The fat cools, solidifies, and coats the inside of your pipes, trapping other debris until the pipe is completely blocked.

    2. Hair

    In the bathroom, hair is the main culprit. It binds with soap scum to form dense clogs that are incredibly difficult to remove without professional equipment.

    3. "Flushable" Wipes

    Despite their name, most wet wipes do not break down in water like toilet paper does. They catch on imperfections in the pipework and cause massive blockages.

    Expert Tip

    Use drain guards in your sinks and showers to catch food particles and hair. This simple, inexpensive device can save you hundreds of pounds in drain unblocking fees.

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