Even minor household water leaks account for nearly 1 trillion gallons of wasted water annually in the United States, according to the U.S. Environmental Protection Agency (EPA). That’s enough water for approximately 11 million U.S. homes for a full year. Major residential leaks also contribute to billions of dollars in property damage and water loss each year. Let’s explore prevention, identification, and repair techniques for hidden leaks in homes.
Leak Detection Methods
Professional plumbers have an array of leak detection methods at their disposal, ranging from tried-and-true to state-of-the-art technologies. Which technique or techniques a plumber recommends for your home will depend on the symptoms you’re experiencing. The most notable assessment options include:
- Visual inspections
- Video camera inspections
- Acoustic listening
- Infrared thermography
- Tracer gas
- Hydrostatic testing
- Moisture sensing
Visual Inspection
A basic visual inspection is often the first step in determining how to proceed. Inside your home, a plumber can check water pressure and listen for unusual plumbing noises. It’s also an opportunity to look for visible signs of water damage and inspect accessible plumbing components. Outdoors, your plumber can inspect spigots, the foundation, landscaping, and hardscape for signs of plumbing problems, including drainage issues. A soggy landscape, for instance, can indicate a significant leak in either your main water line or sewer line.
Video Camera Inspection
Video inspections involve the use of high-definition cameras that transmit a real-time video feed to handheld monitors. The camera attaches to a flexible cable that a plumber can thread through certain sections of your plumbing system. It’s an effective way to find cracks, blockages, corrosion, and other problems in plumbing components not otherwise easily accessed, particularly within drain and sewer lines:
- Drains
- Slab plumbing (drain lines)
- Sewer and septic lines
Acoustic Listening
Acoustic detection is another effective means of identifying plumbing problems behind walls and other surfaces. Most pressurized water leaks produce detectable sound vibrations. While you may not hear them unaided, plumbers can identify them using specialized acoustic equipment. They use sensitive microphones and headphones to pinpoint leak locations. Modern systems can also process the audio to provide visual data and enhanced analysis.
Infrared Thermography
Many plumbing leaks create temperature differences that can be detected with thermal imaging equipment. Infrared thermography uses advanced cameras to identify subtle surface temperature variations. If there’s a leak behind a wall or beneath flooring, it may appear as a temperature anomaly on the screen. Plumbers can use this method to help locate leaks and assess the extent of moisture spread.
Tracer Gas
Plumbing can sometimes develop small imperfections called pinhole leaks. In some cases, such leaks don’t create enough sound for acoustic detection. This method involves introducing a safe hydrogen-nitrogen tracer gas mixture into a drained line under low pressure. If there’s a leak, the gas escapes and rises to the surface, where a sensitive detector can identify it. Plumbers often use this method to help locate leaks beneath driveways, patios, and slabs.
Hydrostatic Testing
Hydrostatic testing involves isolating a plumbing subsystem, commonly a sewer line, and filling it with water to a specified level. If the water level drops over time, it indicates a leak. This method is effective for determining whether a buried drain or sewer line has integrity issues.
Moisture Sensing
Moisture sensing allows plumbers to detect elevated moisture levels in building materials such as drywall, wood, and flooring. Different types of meters measure moisture through electrical resistance, capacitance, or relative humidity. This method can help identify leaks under cabinets, around appliances, and near fixtures. It’s particularly helpful for slow or intermittent leaks. Plumbers may also use moisture meters after repairs to confirm that materials are properly drying.
Leak Repair Solutions
The repairs recommended will depend on the nature of the leak and any related damage. The key repair concepts to understand as a homeowner include:
- Temporary fixes
- Pipe and joint repairs
- Pipe replacements
- Trenchless pipe repairs and replacements
- Rerouting
Temporary Fixes
In some cases, it’s necessary to provide an interim solution before completing a permanent repair. A burst pipe is a common example. Plumbers may apply a temporary clamp or seal to restore limited function until full repairs can be safely completed.
Pipe and Joint Repairs
For relatively small leaks, repairs are sometimes a viable alternative to full replacement. In certain situations involving metal piping, professional welding or brazing may be used. Other repair solutions for various pipe materials include:
- Epoxy compounds
- Pipe repair clamps
- Rubber patch kits
- Self-fusing silicone tape (temporary use)
Pipe Replacements
Plumbers can perform full or sectional pipe replacements. A full replacement involves removing the entire pipe run between connection points. A sectional replacement involves removing the damaged section and installing a new segment with appropriate fittings. For pipes behind walls, this may require limited drywall access. For buried piping, excavation may be necessary unless trenchless methods are suitable.
Trenchless Pipe Repairs and Replacements
For certain buried sewer lines, modern trenchless methods allow for repairs or replacements with less disruption to landscaping and hard surfaces. Cured-in-place pipe (CIPP) relining is commonly used for sewer line rehabilitation. Pipe bursting is another trenchless replacement method typically used for sewer or main service lines, depending on site conditions.
Rerouting
Rerouting can be an alternative solution for slab leaks. In this scenario, the damaged line beneath the slab is abandoned, and a new line is installed through walls or ceilings where it will be more accessible for future service.
How Should Homeowners Prevent Hidden Leaks in the Future
The EPA estimates that approximately 10% of U.S. homes have leaks that waste at least 90 gallons of water per day. As a homeowner, it’s important to remain vigilant by:
- Monitoring water usage
- Scheduling annual plumbing inspections
- Performing plumbing maintenance as needed
Monitor Water Usage
Track your water use month to month and year to year so you can identify unexpected increases. Many water utilities offer usage tracking tools or leak alert programs that notify customers of unusual consumption patterns.
Schedule Plumbing Inspections
Don’t wait for plumbing problems to arise. Schedule periodic plumbing inspections to identify wear or deterioration early. In many regions, fall is a practical time to schedule service before freezing temperatures arrive.
Perform Annual Winterization and Other Maintenance
Winterizing exposed plumbing components can help prevent freeze-related pipe failures. Periodic sewer camera inspections may also be recommended for older homes or properties with mature trees.
Advanced Leak Detection and Repair for Farmington Hills and the Surrounding Areas
AJ Danboise Plumbing, Heating, Cooling & Electrical is a fourth-generation family business located in Farmington Hills, MI. Our company provides a full range of residential plumbing services, including advanced leak detection and repair. We offer same-day service and emergency availability. To schedule an appointment, call now or contact us online.
