If your pool is still losing water and a company says they found nothing, the question is not whether the pool is leaking -- it is whether the first company had the equipment and method to find it.
When a pool is losing water consistently and measurably -- more than the bucket test and evaporation calculator can account for -- and a company says they found nothing, the most likely explanation is not that the pool has no leak. It is that the first company did not have the tools or method to find it.
Dye testing only. A company that used only dye testing checked for structural leaks at visible fittings but missed any underground pipe break entirely. Dye cannot detect a break in a buried plumbing line.
Air pressurization instead of water. Air compresses -- it can hold at a stable gauge reading even when a small break is present. A technician who pressurized with air may have seen a stable gauge and concluded the line was fine, when a water pressure test would have shown a drop. This is how small underground breaks get missed.
No acoustic listening or pipe locating. Without a ground microphone and a pipe locator, the technician had no way to follow the pipe path underground and listen for the sound of a break. They were limited to what they could see in the pool.
No systematic method. A technician working without a structured diagnostic sequence may have checked the obvious locations and moved on without covering every subsystem of the pool.
If your pool's water loss is confirmed beyond evaporation by the bucket test, the leak analyzer shows a pattern consistent with a structural or plumbing leak, and the first company said nothing was found -- schedule a second opinion with a company that carries the full tool stack and uses a systematic method. Ask specifically what equipment they will bring and whether they run multiple verified tests per line.
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Licensed CPC1457277. Full tool stack. Written documentation. Call Sandra to schedule.
Ask what they used. If the answer is primarily dye testing and visual inspection, they were not equipped to find underground pipe leaks. Ask whether they pressure tested the plumbing lines and whether they used water or air to do so. Ask whether they used a ground microphone along the pipe path. The answers tell you quickly what scope of work was actually done.
Yes -- Leak and Subsurface Locators is regularly called to pools where other companies have already attempted a diagnosis without success. This is one of the most common referral scenarios. An incomplete method produces an incomplete result, and the leak continues running while the homeowner believes nothing was found.
If two companies using the full tool stack both produce inconclusive results, the leak may be genuinely at the limits of current detection -- very small, very slow, or in an inaccessible location. In that case, the honest next step is to monitor the water loss carefully over several weeks and schedule another visit when conditions change or the break develops further. Very small pressure drops are the hardest leaks in the trade to confirm.