I have spent years finding leaks in Las Vegas pools, usually with my knees on hot deck stone and my head half inside an equipment pad. I work on plaster pools, fiberglass spas, raised spillways, negative edge basins, and old neighborhood pools that have been patched more than once. The desert makes water loss feel personal because every inch in the pool shows fast, especially in July. I approach each job like a puzzle, because a leak rarely announces itself in a neat way.
The Desert Makes Small Leaks Feel Bigger
I never start by scaring a homeowner into thinking every drop of water is a broken pipe. In Las Vegas, a pool can lose a visible amount of water from heat, wind, splash-out, and a tired autofill valve. I have seen a 30-foot pool look suspicious during a windy week even when the shell was sound. That is why I ask about timing before I unload dye bottles or listening gear.
A customer last spring told me the pool was losing almost 2 inches every couple of days, but only after the pump had run all afternoon. That detail mattered. I watched the equipment pad, checked the backwash line, and found a slow discharge that only showed under pressure. The shell was fine, and the fix was far cheaper than the owner feared.
I like using the bucket test because it gives me a clean starting point. It is simple work. I set a bucket on a step, match the water level inside and outside, shut off extra water features, and come back after about 24 hours. If the pool drops faster than the bucket, I know I am probably chasing a leak instead of normal evaporation.
What I Check Before I Blame the Plumbing
I inspect the tile line first because small cracks there can fool people. A dark line under a loose tile, a tiny gap around a return fitting, or a worn skimmer throat can leak enough to keep an autofill busy all week. I carry dye because water moving through a crack tells a better story than a guess. On one older pool near a golf course, the leak was hiding behind a faceplate that looked clean from 5 feet away.
I also look at light niches, main drains, and fittings before I talk about digging. Many pools in the valley have seen years of hard water, sun, and chemical swings, so seals and gaskets get brittle. I once found a spa leak that only appeared when the water sat above the jet line overnight. The homeowner had already priced out deck removal, but the real repair was around a fitting inside the spa wall.
Some owners call me after reading about a Las Vegas pool leak detection company because they want a second set of eyes before anyone cuts concrete. I understand that instinct because a leak can turn into several thousand dollars of wrong repairs if the first diagnosis is rushed. I would rather spend an extra hour checking fittings, valves, and visible cracks than send a crew to open a deck without proof. Good detection work should reduce guessing, not dress it up with fancy words.
Why Pressure Testing Still Matters
After the visible checks, I move to pressure testing when the symptoms point toward plumbing. I isolate lines one by one, cap returns or suction points, and watch whether a line holds pressure for a reasonable period. A bad line often talks through the gauge before it talks through the deck. I do not trust one reading if the setup was rushed or the plugs were loose.
The tricky part is that pools do not always leak under the same conditions. A suction line may behave differently with the pump off than it does while pulling water. A return line may hold just long enough to make a careless test look normal, then drop after 10 or 15 minutes. I have learned to slow down at that point, because the expensive mistakes often happen after someone accepts the first convenient answer.
Listening equipment helps, but I treat it as one tool, not a magic answer. In a quiet yard, I can sometimes hear a pipe leak under pavers or concrete with good clarity. Near a busy road, an air conditioner, or a loud water feature, the sound can get muddy. That is where experience matters, because I need to separate a real leak sound from noise bouncing through the deck.
How I Read the Equipment Pad
The equipment pad tells me how the pool has been living. I look for salt stains, damp soil, calcium trails, valve drips, and tiny wet spots that stay wet after the rest of the pad dries. A pump lid that pulls air, a cracked union, or a filter clamp with a slow seep can mimic a shell leak over several days. I have found more than one leak by checking the waste line while the system was in a normal run cycle.
Autofill systems deserve their own attention because they hide water loss. I have seen an autofill quietly mask a leak for weeks, then the first high water bill makes the problem feel sudden. I usually ask owners to shut the autofill off for a short test period and mark the waterline with tape or pencil. A small mark on the tile can save a lot of arguing later.
Heaters, solar valves, and water features add more paths for water to escape. A raised spa spillway can leak through stonework while the main pool level looks stable. A sheer descent might lose water behind the wall only when it runs for 20 minutes or more. I try to test the pool in the same way the owner actually uses it, because a perfect still-water test does not always match real life.
What Owners Can Do Before I Arrive
I like when a homeowner gives me clear notes instead of a long theory. The best notes are simple: pump on or off, water level change, recent repairs, and whether the leak stops at a certain point. A photo of the waterline taken each morning can help. So can a picture of the equipment pad while everything is running.
I usually ask owners not to keep adding water right before the appointment unless the level is too low for the pump. A stable waterline helps me see where the pool wants to stop leaking. If the water drops to the bottom of the skimmer and then slows down, that tells me something. If it keeps falling below the returns, I start thinking about lower fittings, lights, drains, or the shell itself.
There are a few things I prefer owners leave alone. I do not want fresh silicone smeared around six fittings before I arrive, because it can hide the exact path of the leak. I also do not want valves moved into strange positions unless the owner writes down what changed. Clean access is helpful, but mystery repairs make the job harder.
Repairs I Trust After the Leak Is Found
Finding the leak is only half the work. I care about matching the repair to the actual failure, because a quick patch in the wrong place can buy 2 months and then fail during the next heat wave. Skimmer throat cracks, light niche leaks, pipe breaks, and structural cracks all need different treatment. I am suspicious of any repair plan that sounds the same for every pool.
For small fitting leaks, I have had good results with proper surface prep and materials made for submerged pool work. For broken plumbing under deck, I want the smallest clean access point that still lets the repair be done right. I have watched crews make a narrow cut, expose the bad section, replace it, and pressure test before the deck was closed. That second pressure test matters to me.
Structural cracks are a different conversation, and I do not pretend every crack means the pool is failing. Some are cosmetic. Some are active. When I see staining, sharp movement, or a crack that pulls dye steadily, I tell the owner what I know and what I do not know. A pool shell deserves a careful repair plan, not a tube of sealant and crossed fingers.
I still like this work because every backyard teaches me something, even after years in the Las Vegas heat. The best leak detection jobs end with the owner understanding the cause, the proof, and the next step without feeling pushed. If your pool keeps asking for water, I would mark the level, watch the equipment, and get the leak found before the desert turns a small problem into a bigger one.

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