The bucket test compares your pool's water loss to normal evaporation over 24 hours. Here is exactly how to do it, how to read the result, and what to do next.
Call (954) 290-5177, Free Estimate →Fill a 5-gallon bucket with pool water to about 1 inch from the top. Set it on a pool step so it sits partially submerged at pool level. Mark the water level inside the bucket and the pool water level on the outside of the bucket. Turn the autofill off. After 24 hours, measure how much each level dropped. If the pool dropped significantly more than the bucket, the pool is losing water beyond normal evaporation.
Use a standard 5-gallon bucket. Fill it with pool water to about 1 inch below the rim.
Set the bucket on a step so it sits in the pool water, partially submerged. This exposes both surfaces to the same air temperature and sun, keeping the evaporation conditions equal.
Use tape or a marker to mark the water level inside the bucket. Then mark the pool water level on the outside of the bucket at the waterline. Both marks on the same bucket makes comparison easy.
The autofill must be off for the full test period or the pool level will not change and the test is invalid.
Do not add water, run the pool unusually, or allow heavy rain during the test period. A calm 24-hour window gives the cleanest result.
After 24 hours, measure how far each level dropped from the original mark. Compare the drop inside the bucket to the drop in the pool.
Normal evaporation. Both surfaces lost the same amount, the pool is not leaking beyond what the climate accounts for.
Strong indicator of a real leak. The pool is losing water beyond what evaporation explains. Call a leak detection specialist.
In South Florida, a difference of a quarter inch or more over 24 hours is meaningful. An inch or more of difference is a clear leak signal that warrants a professional detection visit.
Use the free Leak Business Academy tools to calculate your actual expected evaporation for your pool size and the current weather conditions.
Evaporation Calculator → Leak Analyzer →The bucket test is a good first step and I recommend it to homeowners who are unsure whether to call. But understand its limits, a breezy day or a bucket positioned in full sun while the pool is mostly shaded can skew the result. The test tells you whether there is a meaningful difference. It does not tell you where the leak is.
If your bucket test comes back positive, call us. Do not start digging or pulling apart equipment trying to find it yourself. A detection visit is the next step, not a guess.
Leak and Subsurface Locators serves South Florida for pool leak detection. Licensed CPC1457277. Free estimate before scheduling.
(954) 290-5177 (561) 325-2678 (561) 325-2678Run the pump normally during the first 12 hours and turn it off for the second 12 hours, or do two separate 24-hour tests, one with the pump on and one with the pump off. If the pool loses more water with the pump running, the leak is likely on the pressure side of the plumbing. If it loses more with the pump off, the leak is likely on the suction side or in the shell.
Yes. Rain adds water to both the pool and the bucket but not necessarily equally, rainwater hits the open pool surface across a much larger area than the bucket opening. Wait for a dry 24-hour window to run the test.
Yes. The size of the bucket matters less than the placement and comparison method. Any bucket works as long as it sits on the step partially submerged in pool water so both surfaces face the same evaporation conditions.