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The Ultimate Guide: Blocked Drain or Damaged Drain?

Blocked drain and Broken drain
United Drains 29/04/2025

At United Drains, we understand how drainage issues can disrupt your day. From a frustrating blocked drain to a more serious damaged drain, knowing the difference can save you time, money, and hassle.

Many people assume that all drainage issues are due to blockages. In reality, your drain could be blocked, damaged, or (just to keep things interesting) both. Understanding the difference is key to getting the right fix, fast.

In this guide, we break down the signs, causes, and solutions for both so you can take action with confidence.

What is a Blocked Drain?
A blocked drain occurs when something is physically stopping the normal flow of water through your drainage system. Whether it’s grease, food waste, or even tree roots, the result is the same – slow drainage, unpleasant odours, and potentially overflowing water.

Blocked drains are usually quick to fix with the right equipment. At United Drains, we use powerful tools like high-pressure drain jetting and mechanical rodding to get your pipes flowing freely again.

Common Causes of Blocked Drains

  • Fatbergs: Fat, oil, and grease solidify in your pipes.
  • Hair and soap scum: The ultimate sink and shower cloggers.
  • Foreign objects: Wet wipes, sanitary products, or food scraps.
  • Tree roots: Roots invade your pipes, creating blockages.

Signs you have a blocked drain:

  • Slow drainage: Sinks, baths, or toilets emptying sluggishly.
  • Gurgling sounds: Air bubbles trapped in the pipes.
  • Bad smells: Rotting debris causing foul odours.
  • Overflowing water: Water backing up around the drain.

Blocked drains can often be cleared with specialist equipment, think high-pressure water jetting or mechanical rodding, and are usually fixable in one visit.

What is a Damaged Drain?
A damaged drain involves structural issues, such as cracks, collapses, or misalignments. Unlike a blocked drain, a damaged drain is often hidden underground, causing more extensive problems over time.

Causes of Damaged Drains

  • Tree root intrusion: Roots invade and weaken pipes.
  • Ground movement: Shifting soil cracks or displaces pipes.
  • Corrosion: Poor installation or old metal pipes deteriorating over time.
  • Corrosion: Vehicles or construction damaging underground drains.

Signs You Have a Damaged Drain:

  • Persistent blockages: Clearing doesn’t resolve the issue.
  • Cracks and damp: Visible cracks in walls, floors, or driveways near the affected areas.
  • Sinkholes: Unexplained dips or patches in your garden.
  • Mould growth: Damp patches or mould growth indoors.
  • Rodents appearing: (they love a broken drain)

Unlike blockages, damaged drains often require repair or replacement work, which could involve excavation or trenchless solutions like drain relining. This is something our expert team at United Drains specialises in.

Blocked Drain vs. Damaged Drain: How to Tell the Difference

Misdiagnosing a damaged drain as a simple blockage can lead to recurring issues and even long-term property damage. The sooner we pinpoint the real problem, the faster we can get things flowing smoothly again – and save you money in the long run.
The symptoms can sometimes overlap, which is why our engineers use advanced diagnostic tools like CCTV drain surveys. These give us a clear view of what’s going on inside your pipes and help us determine whether it’s a simple blockage or something more serious.

Here’s how to spot the key differences between Blocked Drains and Damaged Drains:

Blocked Drain:

  • Slow drainage, bad smells
  • Often localised to one area
  • Cleared with professional unblocking

Damaged Drain

  • Persistent issues, cracks, damp patches
  • Larger, more structural problems
  • Requires repair or relining

Let Us Handle Your Blocked Drain Today
A blocked drain can escalate quickly if not addressed. That’s why our team is available 24/7 across England and Wales to tackle even the toughest clogs. Whether you need emergency unblocking or a long-term repair solution, we’ve got you covered.

Not sure what you’re dealing with?
Don’t worry, we’ve got you. Whether it’s a stubborn blockage or a sneaky structural issue, United Drains offers fast, reliable, and cost-effective drainage solutions across England and Wales.

Get in touch today for expert advice, no-obligation quotes, and emergency support whenever you need it.