Yes. Acoustic listening, pipe testing, and trace gas work together to narrow the location of an underground pool pipe break before any concrete is opened.
The question homeowners ask most often before agreeing to a leak detection visit is whether there is any chance of finding the problem without tearing up their deck. The answer is yes -- not always with perfect precision, but with enough accuracy to make any necessary excavation targeted rather than exploratory.
A ground microphone pressed against the deck surface picks up the sound of a pressurized break traveling through soil and into the concrete above. The technician follows the mapped pipe path, listening at intervals. Signal strength changes as the microphone moves closer to or farther from the break. The area of strongest signal gives the general zone. Ground composition affects how clearly the signal travels -- sandy soil (common in South Florida) typically transmits sound better than clay or waterlogged ground.
Air is introduced into each pool plumbing line individually through LSL's custom-built manifold. The technician tests from multiple positions and runs multiple tests, verifying the testing equipment itself between runs to eliminate false readings. A line that loses pressure has a break. Combined with the pipe locator showing the route, knowing which line is leaking is critical information before any acoustic or trace gas work begins.
When acoustic listening identifies a general zone and additional confirmation is needed, trace gas is introduced into the confirmed leaking line. Because gas cannot practically rise through a concrete slab in field conditions, the technician drills small holes at strategic points along the pipe path. These controlled release points allow the gas to reach the sensor. The technician scans each point, identifies where the signal is strongest, then shuts the gas off and continues sniffing -- the last point showing residual concentration is typically the origin zone of the break.
It is important to be honest about what these methods produce. The goal is to narrow the excavation -- not necessarily to locate a single spot accurate to the inch before any digging happens. Acoustic listening gives a zone. Pipe testing confirms which line. Trace gas narrows the zone further. Combined, these methods reduce a 20-foot pipe run to a much smaller area of interest. The repair crew then opens that section and finds the break.
Some jobs produce highly accurate results -- a specific area that the technician is confident about. Others, particularly very small breaks in difficult ground conditions, require the technician to document the evidence gathered and acknowledge where uncertainty remains. An honest result that accurately reflects the confidence level is always better than a false precision that leads to an excavation in the wrong place.
Very slow breaks -- those losing just a fraction of an inch per day -- can produce acoustic signals too faint to read clearly through concrete and soil. The pressure drop may also be too small to confirm definitively on a gauge in a single test session. These situations are the hardest in the trade. When evidence points to a line but the break cannot be pinpointed, the technician documents the findings honestly and discusses options with the homeowner. In some cases, a targeted small inspection hole is opened to give the gas a direct path to the surface -- staged escalation rather than large-scale excavation.
Use these tools to understand your pool's water loss before your visit.
Leak and Subsurface Locators works to narrow underground breaks as precisely as conditions allow. Call Sandra to schedule a visit.
No honest technician guarantees a single-inch accuracy before digging. What leak detection provides is a narrowed zone based on evidence -- acoustic signal, pressure behavior, and trace gas when used. The combination reduces exploratory digging significantly. On most jobs the repair crew opens a small targeted section and finds the break exactly where indicated. On a small number of difficult jobs, some exploratory opening is still needed within the narrowed zone.
Pool plumbing sometimes runs under lanais, covered areas, or even portions of the home. When the pipe path goes under a structure, acoustic and trace gas work can still be performed if there is floor or surface access inside. When there is no access, the technician documents the constraint and discusses options. Locating work is limited to areas where equipment can reach the surface above the pipe.
Yes. Water-saturated soil absorbs and scatters acoustic signals and can slow trace gas migration through the ground. Scheduling a visit after a dry period produces the clearest results. In South Florida where afternoon rain is routine, morning appointments after an overnight dry period tend to give the best conditions for underground work.
Yes. Calling a repair company first -- before the leak is located -- means paying them to do exploratory excavation. That increases labor costs, increases the amount of concrete removed, and increases restoration costs. Leak detection first, repair second is the correct sequence. The repair becomes faster and cheaper when the crew knows exactly where to go.