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DOHERTY BLOG

Warning Signs of a Blocked Stormwater Drain

February 10, 2025
blocked stormwater drains caused by leaves and debris

Are your downpipes overflowing or gutters spilling water everywhere during heavy rains? Is pooling water creating soggy patches in your yard or driveway?

Blocked stormwater drains can cause all sorts of headaches, especially during Melbourne’s wet winters. They’re not always obvious at first, but the longer they’re left unattended, the more damage they can cause.

The good news? Spotting the early signs and taking preventative steps can save you the stress and expense of dealing with severe blockages later on. Our plumbers in Eastern Suburbs will help you identify the warning signs of blocked stormwater drains and show you how to stop them in their tracks.

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blocked stormwater drains caused by leaves and debris

What are stormwater drains?

Stormwater drains funnel rainwater from your roof, driveway, and outdoor areas into underground drainage pipes. This system helps protect your property from flooding and water damage during rainfall.

When these drains are blocked, water has nowhere to go. Instead, it can back up into your gutters, overflow onto your property, or even cause structural damage over time. That’s why it’s so important to keep them clear and functioning properly. It’s always a good idea to ask blocked drain experts for advice if needed.

What is the difference between sewer pipes and stormwater drains?

Sewer pipes and stormwater drains serve two distinct purposes in your property’s drainage system. Sewer pipes are responsible for carrying wastewater from areas like bathrooms, kitchens, and laundries into the underground sewer network.

In contrast, stormwater drains are designed to manage rainwater. They are connected to downpipes that funnel excess rainwater from your roof and outdoor areas into underground drainage systems.

Stormwater drains play a crucial role in protecting your property. By efficiently directing rainwater away, they help prevent water accumulation that could compromise the structural integrity of your building over time.

Common signs of blocked stormwater drains

Blocked stormwater drains often go unnoticed. But if you know what to look for, you can catch the problem early. Here are the most common signs:

1. Overflowing or slow-draining downpipes

If water spills over your downpipes or takes ages to drain away during a downpour, it’s a strong indication of a blockage in your stormwater system. Unused or redundant pipes can also contribute to blockages if not sealed properly, making stormwater capping an important preventative step.

2. Pooling water around stormwater grates

Water pooling near stormwater grates or other drainage points is a classic sign of a blockage. During heavy rains, this can quickly escalate into larger flooding issues.

3. Unpleasant odour near drains

A blocked stormwater drain can trap organic matter like leaves, dirt, and twigs, which decompose over time. This can create unpleasant smells near your drains, often a mix of stagnant water and rotting debris.

4. Discolouration on walls and/or ceiling

Water stains—those brown or yellow patches—on your walls or ceilings can signal that rainwater isn’t draining as it should. This could be due to water backing up into your property because of a blockage.

If left untreated, mould and mildew can develop, leading to potential health risks and further property damage.

5. Wet or soggy patches in the yard

If parts of your lawn or garden remain wet long after the rain has stopped, a blocked drain could be the culprit. Blockages can force water into the soil, creating soggy or muddy areas.

6. Cracked or damaged pipes

If you notice cracks or damage in visible stormwater pipes, this could be caused by tree roots breaking through. Tree roots are a common cause of blockages and pipe damage, as they naturally seek out moisture.

clean and unblocked stormwater drain

How to prevent blocked stormwater drains

While blocked drains can be a hassle, they’re often preventable with a bit of regular maintenance. Here’s how you can protect your stormwater drains and keep your stormwater system in top shape:

  • Clean your gutters regularly
  • Check and clear stormwater grates
  • Trim back trees and plants
  • Install drain covers
  • Inspect your drainage system
  • Schedule professional maintenance

What to do if you have a blocked stormwater drain

If you’ve noticed any of the signs listed above, don’t wait for the problem to worsen. At Doherty Plumbing Solutions, we specialise in diagnosing and fixing stormwater drainage issues quickly and effectively.

Our team uses reliable tools like drain cameras to inspect your pipes and pinpoint the source of the blockage. Whether it’s debris build-up, causes of blocked stormwater drains such as tree root intrusion, or cracked pipes, we’ve got the expertise and equipment to fix the problem with minimal disruption.

Why choose Doherty Plumbing Solutions?

With years of experience serving Melbourne’s eastern suburbs, Doherty Plumbing Solutions is your trusted local plumber. We’re dedicated to providing friendly, professional service and practical solutions to keep your plumbing in top condition.

Blocked stormwater drains can be a hassle, but you don’t have to deal with them alone. Call us at (03) 9877 5775 or submit an enquiry for expert help and advice.

Preventing blocked stormwater drains is easier than fixing the damage they cause. Let Doherty Plumbing Solutions keep your drains flowing smoothly, rain or shine!

Brett Ward
WRITTEN BY

Brett Ward is a director and co-owner of Doherty Plumbing Solutions, a licensed plumber with more than 20 years in the trade across Melbourne's eastern suburbs. He specialises in maintenance plumbing, renovations and blocked drains, and is a member of Master Plumbers and Backflow Australia. On the blog he shares practical advice from the jobs he sees most often on the tools.

More about Brett Ward →
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