Professional leak detection technology finds the vast majority of pool leaks. But the honest answer is that some leaks -- very small, very slow, or in inaccessible locations -- can push the limits of what current equipment can confirm in a single visit.
Most pool leak companies will not tell you this: there are leaks that are genuinely difficult to find with available technology, and there are situations where the honest result of a professional visit is "we found evidence of a problem here but cannot confirm the exact location." That honesty is a sign of a professional -- not a failure.
The full tool stack -- hydrophones, pipe testing, dye confirmation, pipe locating, and trace gas when used -- finds the vast majority of pool leaks encountered in residential work. Active structural leaks at fittings produce acoustic signals and dye confirmation. Underground pipe breaks that are losing meaningful pressure produce gauge readings and acoustic signals. Light niche failures show on dye testing. Skimmer body separations are confirmed with dye. These are the common findings and the tools are highly effective for all of them.
A hairline crack that is losing one-eighth of an inch per day or less may not produce an acoustic signal detectable by hydrophone. It may not cause a pressure drop large enough to register clearly on a gauge in a standard test session. Very small pressure drops are extremely difficult and sometimes cannot be located on a single visit. These require patience, multiple testing sessions, and sometimes waiting for the break to develop further before confirmation is possible.
Pool plumbing sometimes runs under structures -- covered lanais, portions of the home, or other areas without surface access above the pipe path. When there is no surface to press the ground microphone against or to drill release holes for trace gas, the locating tools cannot be used effectively in that section. The technician documents the constraint and discusses options with the homeowner.
Some of the jobs that come to Leak and Subsurface Locators are the ones other leak detection companies have already attempted -- and could not solve. These are the hardest cases in the trade. The approach does not change. Using the H.U.N.T.E.R. Method, the technician systematically isolates the problem area, whether that is a specific plumbing line or the pool shell, and keeps narrowing the zone down to the smallest section possible.
If a specific plumbing line is confirmed as the source, that is a strong start -- but identifying the exact location of a very small break may be impossible without opening the concrete. In those cases, small strategic inspection holes are made in the deck along the pipe path. Trace gas is introduced into the confirmed leaking line and the technician works each hole until a signal is detected. This approach speeds up the process, lowers cost by avoiding full line replacement, and makes the location as accurate as possible. There may be additional charges for the extra work involved in these more complex locates.
Sometimes, after all methods are exhausted, replacing the entire line is actually the less costly option compared to continued diagnostic work on a line that will not reveal its break location non-invasively. That is a practical business decision made transparently with the homeowner.
Water feature leaks present their own category of outcomes. Some water feature designs do not allow test plug installation at all, making pipe testing impossible for that section. In those cases -- after all available diagnostic steps are completed -- some homeowners choose not to repair the water feature at all. They understand that running the feature will cause some water loss, and they decide to run it only when they want to enjoy it and accept the loss during that time.
In other situations, a leaking water feature line can be isolated or blocked while keeping the main pool circulation system fully functional. The pool runs normally and the problematic feature is simply taken offline. This is a practical option when repair cost does not justify the benefit of that specific feature, or when the leak is in a section that cannot be accessed without major work.
The goal is always an honest conversation about what was found, what the options are, and what makes sense for that specific pool and homeowner -- not a one-size-fits-all result.
When a leak cannot be confirmed, a professional technician documents what testing was performed, what each test showed, what was confirmed, and what remained uncertain. If evidence points to a line but the break cannot be precisely located, that is stated clearly. Options for next steps -- a return visit under different ground conditions, a staged small inspection hole, or a different diagnostic approach -- are discussed. This is not a failed visit. It is an accurate record of what the evidence supports.
Use these tools to understand your pool's water loss pattern and what it might indicate.
Leak and Subsurface Locators documents what was found and what was not. No guesswork, no false confidence. Call Sandra to schedule.
Payment terms vary by company. Ask before scheduling what the policy is if the leak cannot be located. Some companies charge for the visit regardless of result; others have partial-refund or return-visit policies for inconclusive results. Understanding this beforehand sets the right expectations for both sides.
Yes, in some cases. A different technician with different equipment or different techniques may approach the problem from a different angle and find what the first visit missed. However, if both visits produce the same inconclusive result, it may indicate a leak that is genuinely at the limits of current technology -- very small, intermittent, or in an inaccessible location. In those cases, monitoring the loss over time and returning when conditions change may be the most practical path.
Yes. Ground saturation after heavy rain absorbs acoustic signals and can slow trace gas migration. High evaporation rates in summer can make it harder to distinguish leak-related water loss from normal evaporation over short monitoring periods. Scheduling a visit during a dry period and using the bucket test to establish a clear water loss baseline before the appointment helps the technician work with the clearest possible evidence.