Pool Leak Detection Service in Orange County

Losing water faster than the weather explains? We find the leak -- shell or plumbing -- and quote the repair honestly. Detection first, guesses never.

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Serving Orange County, CA · Dye + pressure testing · Upfront detection pricing

Leak or evaporation? The OC buyer's test

Every Orange County pool loses water. The question is how much. Up to 1/4 inch per day is normal evaporation -- and during Santa Ana wind season, with hot dry air scraping across the surface, a pool can look like it's draining itself. Autofill valves hide the loss by topping the pool off silently, which is why your water bill rises before you ever see a low level.

The quarter-inch rule: mark the water level at the skimmer, wait 24 hours with normal use, and measure. Under 1/4 inch = evaporation. Over 1/4 inch, consistently = suspect a leak.
Winter is the tell: evaporation drops sharply when air and water cool. A pool still losing significant water in January is not evaporating -- it's leaking.
Wet spots lie: damp ground near the pool isn't proof -- sprinkler runoff and condensation fool owners regularly. Water level loss is the only measurement that counts.
The bucket test settles it (below) -- free, no equipment, one day. Do this before you pay for detection.

The bucket test, step by step

Fill a bucket with pool water and set it on a pool step so the bucket and pool water sit at roughly the same level.
Mark both levels -- inside the bucket and on the pool wall (tape works). Run the pump normally for 24 hours; no swimming.
Compare: if the pool dropped more than the bucket, you have a leak. If they dropped equally, it's evaporation -- save your money.
Run it twice: once with the pump ON, once with the pump OFF. If the loss stops with the pump off, the leak is in the plumbing or equipment side -- not the shell. That single split tells the tech where to start and saves you diagnostic time.

How the pros pinpoint it

Dye test: for the shell. The tech releases dye near suspect spots -- return fittings, skimmer throats, light niches, steps, main drains -- and watches for the dye getting pulled into a crack or gap. The dye flows toward the leak; there's no arguing with it.
Pressure test: for the plumbing. Each line is isolated and pressurized; the line that won't hold pressure is the leaking one. This is how underground pipe leaks get found without digging up the deck on a hunch.
Light and fitting checks: niches and conduit are the most common structural leak points -- old light gaskets and cracked skimmer throats out-leak everything else in the shell.
The report: a detection visit ends with the leak located and marked, not just a yes/no. That's what the repair quote is based on -- quoting a repair without a detection report is a guess.

Pricing: what leak detection costs in Orange County

Service	Typical OC range	Notes
Leak detection service visit	$150–$600	Diagnostic fee; size and plumbing complexity move the price
Dye test (shell)	usually included	Part of the standard detection visit
Pressure test (plumbing lines)	included or +$100–$200	Needed when the bucket test points at the plumbing
Vinyl liner repair	$455–$3,417	Patch vs. partial vs. full liner replacement (manta 2026)
Plaster crack / fitting repair	a few hundred typical	Often the cheapest fix -- quoted from the detection report

Detection is a diagnostic fee; the repair quotes separately, and many companies credit part of the detection fee toward the repair. Get the detection report first -- the repair price follows the diagnosis.

After the detection: repair paths

Shell cracks and fittings -- plaster patches and fitting reseals are the common fix; most are same-day or next-day work.
Liner leaks -- patches for small tears, partial or full replacement for failing liners ($455-$3,417 range).
Plumbing leaks -- isolated lines can often be repaired or re-routed without tearing up the whole deck; the pressure test tells the tech exactly which line.
Equipment-side leaks -- pump seals, filter gaskets, heater connections. See our filter & equipment maintenance -- weekly eyes catch these before they become structural problems.

Frequently asked questions

How do I know if my pool is leaking or just evaporating?

The rule of thumb: up to 1/4 inch of water loss per day is normal evaporation, especially in Orange County heat and Santa Ana wind season. Losing more than that consistently -- or watching the level drop in winter when evaporation slows -- points to a leak. The bucket test below is the free way to settle it before you pay for a pro.

How much does pool leak detection cost in Orange County?

A professional leak detection service typically runs $150-$600, depending on pool size, leak complexity, and whether plumbing pressure-testing is needed. It's a diagnostic fee: the tech finds and marks the leak, then quotes the repair separately. Many companies credit part of the detection fee toward the repair.

What is a bucket test and how do I do it?

Fill a bucket with pool water, set it on a step so both are at the same level, and mark the water line inside the bucket and on the pool wall. Wait 24 hours (pump running normally, no swimming). If the pool drops more than the bucket, you have a leak -- not evaporation. Then run the test with the pump off: if the loss stops, the leak is in the plumbing, not the shell.

What do dye tests and pressure tests find?

A dye test finds structural leaks: the tech releases dye near suspect spots (fittings, lights, returns, steps) and watches whether it gets pulled into a crack or gap. A pressure test finds plumbing leaks: each line is isolated and pressurized, and the line that won't hold pressure is the leaking one. Pros use both -- dye for the shell, pressure for the pipes.

How much does it cost to repair a pool leak?

It depends on what the leak is. Vinyl liner repairs run $455-$3,417 depending on severity and whether a partial or full liner replacement is needed (manta 2026). Plaster cracks and fitting leaks are typically much cheaper -- often a few hundred dollars. Equipment-side plumbing leaks quote separately. Get the detection report first; quoting a repair without it is a guess.

Losing water? Find out before it gets worse.

Detection first, guesses never -- we'll locate the leak and price the repair honestly.