For many homeowners across Perth, Western Australia, irrigation systems are something that quietly operate in the background without much thought. The sprinklers come on automatically, the lawns stay green, the gardens remain healthy, and everything appears to work exactly as it should. That is, until one day a section of the reticulation system suddenly stops functioning properly and nobody knows where the problem is actually located.
One of the most common challenges with irrigation systems is locating buried solenoids. Over time, these underground valves often disappear beneath grass, soil, mulch, paving, or landscaping changes, leaving homeowners with no idea where critical parts of their irrigation system are hidden. When repairs or maintenance become necessary, this can quickly turn into a frustrating and expensive exercise if the right equipment and experience are not involved.
At Plumbdog Plumbing, we regularly assist homeowners with underground plumbing and irrigation issues including buried irrigation solenoids, hidden water leaks, underground pipework faults, and reticulation repairs. While we are certainly not afraid to get our paws dirty, we also believe there is a smarter and more efficient way to approach underground diagnostics. Digging is simply part of plumbing life, but there is a huge difference between targeted excavation and unnecessarily tearing apart an entire backyard hoping to eventually find the problem.
That is exactly why we combine practical plumbing experience with modern locating technology. We like to say we have “all the gear and every idea,” and nowhere is that more apparent than when tracking down hidden underground plumbing and irrigation faults.
Understanding What an Irrigation Solenoid Does
Most people have heard the term “solenoid” before, but many homeowners are unsure what these components do or why they are so important.
An irrigation solenoid is essentially an electrically controlled valve that manages water flow to different parts of a reticulation system. When the irrigation controller activates a watering schedule, it sends an electrical signal through underground wiring to the relevant solenoid. Once activated, the solenoid opens and allows water to flow through a particular irrigation zone.
This is what enables different areas of the property to water independently. One solenoid may control the front lawn sprinklers, another may operate drip irrigation through garden beds, while another may manage the backyard reticulation. Without these valves functioning correctly, the irrigation system simply cannot distribute water where it is needed.
The challenge is that these valves are rarely visible. In most installations, solenoids are buried underground inside valve boxes for protection and to keep the system visually unobtrusive. Over the years, however, many of these valve boxes become completely hidden as lawns grow over them, gardens are redesigned, paving is added, or soil levels gradually change. In some cases, homeowners move into a property years after installation and have absolutely no idea where the irrigation valves are even located.
This becomes a major problem when something goes wrong.
A reticulation zone may suddenly stop operating, water pressure may drop unexpectedly, sprinklers may fail to activate, or sections of the garden may become flooded because a valve is no longer shutting off properly. Without knowing where the buried solenoid is located, even relatively straightforward irrigation repairs can become extremely difficult.
Why Proper Detection Matters
Traditionally, locating buried irrigation valves often involved a lot of guesswork. Contractors would attempt to follow underground pipework manually, probe around gardens, or simply begin digging in areas where they believed the valves might be located. While this approach occasionally works, it can also lead to unnecessary excavation, damaged landscaping, wasted labour time, and significant frustration for homeowners.
At Plumbdog, we genuinely enjoy the physical side of plumbing work. We are always happy to grab the shovel, get our paws dirty, and do whatever is required to solve the problem properly. But we also understand that most homeowners would prefer not to have their entire backyard dug up simply to locate one hidden valve.
That is where specialised locating technology becomes incredibly valuable.
In our VLOG, Evan from Plumbdog Plumbing demonstrates how professional plumbers use a dedicated solenoid locator to accurately identify buried irrigation valves underground. Rather than relying purely on guesswork, the locating equipment allows us to narrow down the search area significantly before excavation even begins.
The process itself is quite fascinating. The locator is first connected directly to the irrigation controller or system wiring. Once connected, the device sends a traceable electrical signal through the underground wiring network which runs directly to the buried solenoids. A handheld locating wand is then used above ground to track the signal path and identify the valve locations beneath the surface.
As the technician moves closer to the buried solenoid, the signal strength increases, allowing the exact location to be pinpointed with far greater accuracy than traditional manual searching methods.
One of the key parts of the process involves adjusting the signal strength correctly. In the video, Evan explains how settings between four and eight often provide the best balance between range and precision. If the signal is too weak, the locator may struggle to trace the underground wiring properly. If the signal is too strong, the detection area can become too broad, making it harder to accurately pinpoint the valve location. Understanding how to properly balance these settings is something that comes with both experience and a solid understanding of underground plumbing systems.
Experience Still Plays a Huge Role
While modern locating equipment is extremely effective, technology alone does not solve problems. Like many aspects of plumbing and leak detection, successful diagnostics still rely heavily on practical experience and technical understanding.
At Plumbdog, we regularly perform underground investigations throughout Perth involving water leak detection, blocked drains, hidden pipework tracing, gas leak detection, and irrigation system diagnostics. Many of these jobs share similar principles. The equipment provides valuable information, but understanding how to interpret that information correctly is what ultimately leads to accurate results.
During irrigation investigations, it is also quite common to uncover additional underlying issues. What initially appears to be a simple buried solenoid problem may actually involve damaged underground wiring, leaking pipework, faulty valves, root intrusion, corroded fittings, or previous poor quality repairs. Because we are licensed plumbers and not simply irrigation installers, we are often able to both locate and repair the broader plumbing problem at the same time.
This can save homeowners considerable time, money, and frustration compared to coordinating multiple contractors for different stages of the work.
Minimising Damage While Solving the Problem Properly
One of the biggest benefits of professional locating equipment is the ability to minimise unnecessary disruption to the property. Accurate detection allows excavation to remain targeted and controlled rather than excessive and destructive.
For homeowners, this often means less damage to lawns and landscaping, less unnecessary digging, faster diagnosis, reduced labour costs, and a far more efficient repair process overall.
More importantly, once the buried valves are properly identified and exposed, future maintenance becomes much easier. Homeowners and technicians alike gain a much clearer understanding of the irrigation system layout, making future servicing, upgrades, or repairs far less invasive.
At Plumbdog Plumbing, we believe good plumbing is not simply about digging holes and replacing parts. It is about combining practical hands on experience with modern technology to deliver smarter, more efficient, and longer lasting solutions.
Of course, we are always happy to get our paws dirty when the situation calls for it. But by investing in the latest locating equipment and continually improving our underground diagnostic capabilities, we can enjoy the digging without destroying the whole backyard in the process.
Because at the end of the day, having all the gear and every idea means being able to solve problems properly while treating our customers’ homes with the care and respect they deserve.
