5 Signs Your Underground Drain is Blocked

A well-functioning drainage system is crucial for the smooth operation of any home or business.

However, many people often overlook the condition of their underground drainage until a serious problem arises.

Identifying the early signs of a blocked drain can save you from costly repairs, water damage, and potential health hazards.

In this guide, we’ll highlight the top 5 signs that your underground drain is blocked and explain what you can do about it.

1. Slow Draining or Standing Water

One of the first warning signs of a blocked drain is slow drainage in your sinks, bathtubs, or toilets.

If you notice that water is taking longer to drain or if there is standing water, it could indicate a clog in the drainage pipes.

Why It Happens

Slow drainage typically occurs when water cannot flow freely through the drainage system due to a blockage.

This can be caused by a build-up of toilet paper, food particles, grease, or tree roots that have invaded the pipes.

Common Symptoms

  • Water pooling around the shower drain.
  • Toilet water rises higher than usual before draining.
  • Slow water flow from sinks and bathtubs.

What You Can Do

For minor blockages, try using hot water and baking soda to break down the clog.

However, it’s best to call a plumber if this doesn't solve the issue.

Persistent slow drainage can indicate a more serious problem, such as a collapsed drain or a blockage deep within the sewer pipes.

2. Foul Smells or Bad Odours

Unpleasant smells inside and outside your property can signify a clogged sewer line.

If you notice a foul odour coming from your drains, garden, or the surrounding area, it’s a major red flag that your underground drains are compromised.

Why It Happens

When there is a blockage, trapped debris decomposes and releases bad smells through the pipes.

The odour can spread throughout your property, especially if the problem is left untreated.

Common Symptoms

  • Persistent foul smells from bathroom or kitchen drains.
  • Unpleasant smells around your garden or field.
  • Odours that worsen after using the water system.

What You Can Do

For temporary relief, try neutralising the smell with a mixture of baking soda and vinegar.

However, this only masks the problem temporarily.

A camera inspection or a CCTV drain survey is recommended for a permanent solution to identify and fix the underlying problem.

3. Overflowing Drains or Gullies

If you notice that your outdoor drains or gullies are overflowing, especially during or after rainfall, this is a clear sign that your drains may be blocked.

Why It Happens

Overflowing drains occur when water can't flow freely through the drainage system due to a blockage.

This can be caused by a build-up of leaves, debris, or even more serious issues like collapsed pipes or tree root intrusion.

Common Symptoms

  • Water pooling around outdoor drains
  • Gullies overflowing during rainfall
  • Flooding in your garden, even with moderate rainfall

What You Can Do

Start by removing any visible debris from the drain covers.

If this doesn't solve the issue, it's best to call a professional for help.

4. Frequent Sewage Backups

A sewage backup is one of the most obvious signs that your underground drainage is blocked.

If you frequently experience backups in sinks, toilets, or basement drains, it’s crucial to address the issue immediately.

Sewage backups can cause serious water damage and pose a significant health risk.

Why It Happens

When a blockage occurs in the main sewer line, wastewater has nowhere to go but back into your home.

This is often caused by tree roots infiltrating the pipes, a build-up of grease or debris, or even a collapsed drain.

Common Symptoms

  • Toilet or sink water rising after flushing.
  • Sewage is coming up through floor drains.
  • Persistent clogs despite regular drain cleaning.

What You Can Do

A camera inspection is the best way to diagnose the issue and determine whether it’s a simple clog or a more serious problem, such as a collapsed pipe.

Depending on the severity, solutions can range from drain cleaning to replacing the affected pipes.

5. Visible Water Leaks or Water Damage

If you notice water leaks or damage around your property, it could be a sign of a blocked drain or a collapsed pipe.

This is particularly concerning because it can lead to structural damage and create health hazards like mould growth.

Why It Happens

When a drain is blocked, excess water can’t flow properly through the system and begins seeping out of cracks or joints in the underground pipes.

Over time, this can weaken the foundation of your property, causing structural damage.

Common Symptoms

  • Water pooling in the yard or garden.
  • Damp patches or water leaks around the foundation.
  • Wet areas in the lawn, even during dry weather.

What You Can Do

Contact a professional for a CCTV drain survey to inspect your underground pipes.

If a collapsed drain or serious blockage is identified, a professional plumber can recommend the appropriate repair or replacement.

When to Call a Professional Plumber

While minor clogs can sometimes be resolved using home remedies, more serious drainage problems require professional intervention.

If you notice any of the signs mentioned above, such as sewage backup or foul smells, it’s time to call an expert.

A professional plumber will use advanced techniques to clear blockages and assess the condition of your drains.

Preventive Measures to Avoid Blocked Drains

Prevention is always better than cure. Here are some tips to keep your underground drainage in good health:

  • Regular Drain Cleaning: Schedule routine cleaning to prevent the build-up of grease, food particles, and other debris.
  • Tree Root Management: To prevent roots from penetrating the pipes, consider removing or trimming trees near your sewer system.
  • Proper Waste Disposal: Avoid flushing items like wipes or cooking grease down the drains.
  • Install Drain Guards: Use drain guards in sinks and showers to catch hair and other debris before they enter the pipes.

Don’t Ignore the Warning Signs

Taking prompt action will ensure the health and longevity of your plumbing system, keeping your home or business safe from potential water damage and health risks.

By staying vigilant and addressing drainage problems early, you can maintain a healthy, fully functioning drainage system and avoid the headache of costly repairs down the line.