At a home on Railway Parade South in Chadstone VIC 3148, our team at Your Choice Plumbers was called out after the homeowner reported a recurring sewer overflow through the Overflow Relief Gully (ORG).

This was not the first time the property had experienced sewer trouble, which immediately suggested the issue was deeper than a one-off blockage. On older homes, recurring sewer overflows are often a sign that the drain needs more than just another temporary clear. They need proper diagnosis to identify whether the real problem is tree roots, a damaged section of pipe, or a missing access point that has made past clearing attempts incomplete.

This is exactly the kind of situation where homeowners start asking, “why does my sewer keep blocking again?” or “do I need a CCTV drain inspection if the drain has already been cleared before?” As an experienced plumber Chadstone, we know recurring sewer problems need proper investigation, not guesswork.

The Problem – A Recurring Sewer Overflow Through the ORG

When we arrived, the homeowner already suspected this was more than a simple toilet blockage.

The property lacked proper sewer inspection access points, which made previous troubleshooting and maintenance more difficult. That is a common issue on older properties where the original drainage system may still be in place but the access for modern diagnostics and clearing has not kept up with what is actually needed.

Recurring ORG overflow is one of the clearest signs that the sewer line is struggling to discharge properly. In practical terms, it usually means there is a deeper issue affecting the main drain, not just one isolated fixture inside the house.

The First Step – Confirming the Main Sewer Drain Was Blocked

To understand whether the ORG was the actual problem or just the relief point showing a bigger issue, we carried out initial testing by flushing toilets both upstream and downstream of the gully.

That testing confirmed the blockage was affecting the main sewer drain, not just the ORG itself.

This was an important result because it changed the job from a localised overflow issue to a full sewer diagnosis. At that point, the homeowner agreed to proceed with proper drain clearing followed by camera inspection so the true cause could be identified.

Clearing the Sewer Blockage Properly

To restore flow, we gained access via the external 100mm inspection opening bend near the upstream toilet.

From there, we used hydro jet drain cleaning to clear the blockage through the main drain line. The jetting process took time because the issue was not just a light obstruction — it was a stubborn recurring blockage affecting an older sewer system.

Once the line responded properly and the drain opened up, we were able to move to the most important part of the job: finding out why it had been blocking repeatedly.

CCTV Inspection Revealed the Real Cause

After the drain was cleared, we inserted a CCTV drain camera to inspect the full sewer line properly.

The footage showed that the recurring blockage was being caused by tree roots entering through the top of the pipe at an old inspection opening cap. Over time, the mortar holding that cap in place had perished, creating a direct entry point for roots to get into the drain.

This was the key discovery.

Without the camera inspection, the drain could easily have been left as “cleared for now,” with the homeowner likely facing the same blockage again later. Instead, the inspection gave a clear explanation for why the sewer kept failing and why temporary root cutting alone would not be enough as a long-term answer.

Pinpointing the Exact Repair Location

Once the defect had been confirmed on camera, we used a NaviTrack Scout locator to pinpoint the location of the damaged section from above ground.

This showed the affected section was approximately:

  • six metres from the corner of the property
  • in an open grass area
  • around 1.2 metres deep

That was a good result from a repair-planning point of view because it meant the defective section could be accessed in a relatively straightforward area without unnecessary disruption to harder surfaces.

Accurate locating is a major part of good drainage work. It helps keep excavation targeted and ensures the repair is based on real data rather than assumptions.

Why a Permanent Sectional Repair Was the Right Option

At this point, the homeowner made an important decision.

Rather than simply clear the roots and wait for them to come back, they chose to proceed with a proper sectional repair. That was the smarter long-term call because the drain had already shown it would keep failing while the defective inspection cap and root entry point remained in place.

This is exactly why recurring blocked drains Melbourne issues should not always be treated as standard clearing jobs. Once a structural defect is confirmed, ongoing maintenance alone is rarely the best long-term answer.

Permit and Compliance Steps for the Repair

Because the work involved below-ground sewerage alteration, proper compliance steps were required before the repair could proceed.

We organised:

  • a P.I.C. number through South East Water
  • and booked an underground drainage inspection through the Building and Plumbing Commission

These are important parts of compliant sewer repair work. They make sure the repair is not just practical, but also completed to the right regulatory standard.

Completing the Sectional Drain Repair and Upgrade

Once approvals and inspection arrangements were in place, we carried out the sectional repair by replacing the damaged terracotta sewer section.

As part of the same work, we also installed an additional 100mm inspection opening to surface level at the repair location.

That upgrade added real long-term value because it means any future maintenance or inspection can now be carried out far more easily than before. Instead of dealing with a property lacking proper access, the homeowner now has a much more serviceable sewer setup going forward.

So the final outcome was not just a repair — it was also a meaningful improvement to the drainage system’s future maintainability.

The Result – Sewer Flow Restored and Access Improved

Once the work was complete, the homeowner had:

  • the recurring sewer blockage cause identified properly
  • the root entry point removed
  • the damaged terracotta section replaced
  • the sewer brought back into reliable operation
  • and a new 100mm surface inspection opening for future access

That is a much stronger result than a temporary clear alone.

Instead of simply relieving the symptoms, the job addressed the root cause and improved the property’s sewer access at the same time.

Why This Job Matters

This case is a strong example of why recurring sewer blockages should never be treated as “just another blockage.”

Where a sewer keeps failing, the most important question is not how quickly it can be reopened — it is why it keeps closing up in the first place. In this Chadstone property, the answer was a combination of:

  • an ageing terracotta sewer line
  • a failed inspection opening cap
  • root intrusion
  • and poor existing access for modern maintenance

That is why combining hydro jet drain cleaning with a CCTV drain inspection and proper targeted repair is often the best path on older sewer systems.

Our Home Plumbing Experts Approach

At Your Choice Plumbers, we focus on both immediate drain clearing and long-term reliability.

Where a blockage is temporary, we clear it properly. But where the real issue is structural, we explain that clearly and guide the homeowner toward the repair that gives the best long-term result.

That is the difference between simply reopening a drain and actually solving the drainage problem.

Need a Plumber in Chadstone?

If you are dealing with a recurring sewer blockage, ORG overflow, or want the real cause of your drain problem identified properly, visit our Plumber Chadstone page to learn more about how we help local homeowners.

You can also learn more about our blocked drains Melbourne, hydro jet drain cleaning, and CCTV drain inspection services.