Overview of the Leak Issue

At a property on Trevelyan Street in Elsternwick VIC 3185, our team at Your Choice Plumbers Elsternwick was called out after the homeowner noticed the entire front garden had become extremely soggy, with water pooling across the lawn.

This is a common situation where homeowners begin asking, “why is my garden always wet in one spot?” or “could I have a water leak underground?”

In this case, the issue had been developing over time. What likely started as a small leak on the main water line had progressed into a major burst, saturating the entire front yard.

Initial Diagnosis and Key Clues

As part of our structured leak detection melbourne approach, we began by checking the water meter located at the front of the property — approximately 8 metres from the house, which is typical for Californian bungalow homes in this area.

The water meter confirmed continuous flow, indicating a live leak on the main supply line between the meter and the house.

At this stage, the challenge became clear.

Why This Leak Was Difficult to Locate

Unlike standard underground leaks where water is localised, this property was built on flat ground, and the leak had been left unattended for an extended period.

As a result:

  • The entire front garden became saturated
  • Water spread across the full lawn area
  • No clear “soft spot” could be identified

This is often when homeowners ask, “how do you find a water leak under the ground if everything is wet?”

Standard Detection Method (When Conditions Allow)

Under normal conditions, our approach involves:

  • Tracing the water main from the meter to the house using a directional technique
  • Mapping the pipe path using copper rods (similar to water divining methods)
  • Probing the ground using a fibreglass soil probe to identify the softest point

This method is highly accurate and typically allows us to locate leaks within 300mm of the fault.

Why Standard Detection Failed in This Case

Due to the entire garden being waterlogged, the ground was uniformly soft, making it impossible to isolate a specific failure point.

At this stage, continuing with standard methods would have resulted in unnecessary excavation and increased cost.

Advanced Leak Detection (Tracer Gas + Acoustic)

We escalated to a professional leak detection contractor.

The system was:

  • Pressurised using tracer gas (5% hydrogen, 95% nitrogen)
  • Tested using acoustic listening equipment

This allowed us to pinpoint the exact location of the underground burst despite the saturated conditions.

Excavation and Repair Approach

Due to the heavy water saturation, we:

  • Excavated a large working area
  • Created a sump within the trench to collect water
  • Used pumps to remove excess groundwater

Once the burst pipe was exposed, we identified a severely corroded galvanised water main.

Root Cause of the Problem

The original galvanised pipe had deteriorated over time.

Key issues:

  • Internal corrosion restricting flow
  • External corrosion weakening the pipe
  • Long-term undetected leak progression

This is a common issue in older homes, especially in areas like Elsternwick.

Repair and Full System Upgrade

Given the condition of the pipe, we recommended a full replacement of the affected section.

We:

  • Replaced the main with new 20mm copper pipe
  • Connected to existing internal copper services
  • Flushed the system thoroughly
  • Tested all fixtures

Critical Compliance Finding – High Water Pressure

After restoring supply, we tested the water pressure.

Recorded pressure: over 800 kPa

This significantly exceeds the recommended 500 kPa limit under AS/NZS 3500.

We installed a pressure regulating valve at the meter to bring the system into compliance and protect the new pipework.

Outcome and Client Result

  • Leak accurately located using advanced detection
  • Full pipe replacement completed
  • Water pressure corrected
  • System performance improved

The client was especially impressed with the improved water flow and shower pressure after replacing the restricted galvanised pipe.

Compliance & Prevention Insight

This case clearly shows how a small leak, if ignored, can escalate into a major underground failure requiring specialised detection and increased repair costs.

Many homeowners experiencing soggy gardens or high water bills are often dealing with hidden underground leaks.

Compliance with Australian Standards

All work carried out by Your Choice Plumbers is completed in accordance with AS/NZS 3500, ensuring safe and compliant plumbing systems.

In simple terms, this means your plumbing is installed and tested to strict national standards — helping protect your property from leaks and costly damage.

Our Home Plumbing Experts Approach

As part of our Home Plumbing Experts approach, we focus on both repair and prevention.

We offer a Complimentary Property Protection Audit as part of our service, assessing key areas like water pressure, hot water temperature, and flexible hoses — helping homeowners stay ahead of potential plumbing failures.

Learn More About Our Leak Detection Services Melbourne