
Locating plastic pipes in walls is crucial to avoid costly damage and injuries when drilling holes, driving screws, or hanging pictures. While plumbing knowledge and visual inspections help, using tools like electronic pipe detectors ensures accuracy and safety. These devices, such as the Bosch D-TECT 150, can identify the exact location and depth of pipes, preventing accidental punctures. Alternatively, an old-school method involves using a screwdriver to penetrate walls while listening for water flow, though this may not work for all pipe materials. Understanding plumbing basics and employing detectors are key steps to successfully finding plastic pipes in walls.
| Characteristics | Values |
|---|---|
| Tools | Pipe detectors, stud finders, Gloc pe locator, MULTIDETECTOR PS 50, BOSCH D-TECT 150, screwdrivers |
| Techniques | Visual inspections, tapping techniques, electronic detection |
| Precautions | Turn off all appliances, check insurance coverage, consult a professional if unsure |
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What You'll Learn

Using a screwdriver
The screwdriver technique can be used to get a good idea of where pipes are, and then you can decide if you need to use more sophisticated measures to find their exact location. This method is similar to using a stethoscope to listen to the walls. You can also use a screwdriver to penetrate the plasterboard and see what is behind it. This method may result in a few holes that will need to be filled, but it is a good way to check for pipes before drilling.
It is important to locate plastic pipes in your walls to avoid damaging them during home improvement projects or repairs. This will prevent costly water damage and the inconvenience of having to shut off your main water supply. Before drilling into any walls, always make sure to turn off the main water supply to your home. This will prevent any accidental leaks or flooding.
If all else fails, it is best to consult a professional plumber. They have specialised tools and knowledge to accurately locate plastic water pipes in walls without causing any damage.
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$179.95 $199.95

Electronic pipe detectors
Some advanced pipe detectors can also create a full electrical plan of your home, helping to identify hidden telephone and coaxial cables. These devices are precise and help prevent damage to pipes and cables during renovation work. They are also useful for detecting metal grids and can be used on ceilings to prevent short circuits.
Popular Mechanics recommends the Bosch GMS120-27 Wall Scanner and Stud Finder, which can identify metal pipes, electrical wires, and wood studs. This model uses ground-penetrating radar to create a subsurface image, ensuring more precise detection of objects.
Other recommended pipe detectors include the Laserliner 083.070A CableTracer Pro, Ridgid 76898 SeekTech SR-24 LE Utility Line Locator, and the Bosch Professional D-Tect 120 Multidetector, which can locate empty plastic pipes.
While electronic pipe detectors offer precision, some traditional methods can also be used, such as using a screwdriver to penetrate the plasterboard and listen for water flow, though this may not be as accurate.
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Visual inspections
Start by looking in the most obvious places: under sinks, in basements, or utility areas where pipes are often exposed. Exposed pipes in these areas can provide valuable clues about the direction in which the pipes are running and branching off to different fixtures. This initial inspection can give you a general idea of the plumbing layout and help you make more informed decisions when using other detection methods.
If you suspect a leakage in one of the walls, look for visual damage or signs of moisture. Hidden water leaks can often be noticed through visual clues, such as discoloured or damaged walls, peeling paint, or the presence of mould. Pay close attention to areas near sinks, bathtubs, or toilets, as leaks are more common around plumbing fixtures.
When performing a visual inspection, keep in mind that water pipes typically run from the ground up. In houses with basements, it's often easier to trace the pipes' path. However, for slab foundations, tracing pipes can be more challenging, and you may need to rely on other detection methods in conjunction with your visual observations.
While visual inspections are a crucial first step, they might not always be sufficient on their own. Combining visual inspections with other techniques, such as tapping methods or using dedicated detectors, will provide a more comprehensive understanding of the plumbing system. Remember always to exercise caution and consult a professional if you have any doubts during the process.
By conducting a thorough visual inspection and familiarising yourself with the basic plumbing layout, you can increase your chances of successfully detecting plastic pipes in walls and avoid costly mistakes during your home improvement projects.
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Tapping techniques
Using a Screwdriver
One method that uses a screwdriver involves running water through the pipes and placing the tip of the screwdriver against the wall. By placing your ear against the handle of the screwdriver, you can listen for the sound and vibration of running water. This technique creates a makeshift stethoscope, allowing you to pinpoint the location of the pipes.
Stethoscope Method
A similar approach involves using a stethoscope in place of a screwdriver. Turn on the water and use the stethoscope to listen to the walls, identifying the sound of water running through the pipes. This method is simple and reliable for finding plastic water pipes.
Acoustic Detection Tools
Modern acoustic detection tools, such as infrared cameras and acoustic detectors, offer a non-invasive way to locate pipes. These tools amplify the sound produced by water flowing through the pipes, allowing you to trace their path behind the walls. Acoustic detection is a favourite for quick inspections as it is accurate and does not pose any risk to the pipes.
Wall Scanners and Stud Finders
Wall scanners and digital detectors are cutting-edge tools that provide a visual map of what lies behind your walls. They can accurately locate plumbing, studs, and electrical conduits. While they may be more expensive than traditional stud finders, their precision makes them invaluable for renovation projects.
When using tapping techniques to find plastic pipes in walls, it is important to exercise caution to avoid causing any accidental damage. Combining these methods with visual inspection through access panels or small holes can help confirm the location of the pipes without the need for invasive procedures.
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Professional help
If you are unsure about how to locate plastic pipes in your walls, it is best to seek professional help. Consulting with an expert plumber in your area can save you time and money. They will know where to look and fix the issue effectively and efficiently.
Professionals use specialised wall scanners to detect plastic pipes, metal pipes, studs, and any other obstructions. These scanners can be expensive, so it may be more cost-effective to hire a professional who already has one.
Another method used by professionals is a pipe detector, which can find plastic water pipes in your wall. To use this, you need to run a nearby tap or shower so that the detector can detect the pipes.
If you are worried about pipes in your walls, you can also upgrade your house insurance to cover accidental drilling through pipes. This can give you peace of mind and protect you financially in case of any mishaps.
Overall, while it is possible to locate plastic pipes in your walls on your own, seeking professional help can be a wiser and more prudent decision. They have the knowledge, expertise, and specialised tools to get the job done right the first time.
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Frequently asked questions
You can use a handheld electronic pipe detector to find plastic pipes in your walls. These devices are designed to identify the location of electrical cables, gas and water pipes, and other obstructions in the wall. Alternatively, you can use the "old school" method of a long screwdriver. Turn off all water appliances, let the water run from the tap, and press the tip of the screwdriver into the wall, listening for the sound of water flow.
Drilling into a wall without checking for pipes can lead to serious damage to the pipeline, which can be very costly. It can also be dangerous, as it may result in hidden water leaks that are difficult to notice during repair.
If you suspect a leak in one of your walls, you can use a hidden water leak detection service. You can also try to visually identify the leak by turning off all water appliances and checking for signs of damage.











































