Is Your Pool Leaking? Five Checks Before Booking Leak Detection
Water loss is not always a leak. Evaporation, splash out, backwashing and an overflowing waste line can all lower the level. A few simple observations can help identify whether the pool, equipment or plumbing needs investigation.
Five checks before booking leak detection
1. Measure the loss
Mark the pool level and note the time, weather and whether the cover was used. A bucket test can help compare pool loss with normal evaporation when performed correctly.
2. Inspect the equipment pad
Look around the pump, filter, chlorinator, heater, valves and unions. Some leaks appear only while the pump runs, while suction side leaks may draw air in without leaving a large puddle.
3. Check the waste line
A leaking multiport valve can quietly send water to waste while the filter is operating. Inspect the discharge point when the system is set to filter.
4. Watch for air in the system
Persistent bubbles under the pump lid or at the return jets can indicate a suction side air leak. This does not prove the underground line is leaking, but it narrows the investigation.
5. Note where the water stops
If the level repeatedly settles at the same height, inspect fittings near that line, including the skimmer, return jets and lights. Do not deliberately let the water fall below the safe operating level for the pump.
Does it leak more while the pump runs?
| Observation | What it may suggest |
|---|---|
| More loss while running | Return plumbing, filter, heater, waste line or pressure side equipment |
| More loss while stopped | Pool shell, fittings or suction plumbing below water level |
| Similar loss either way | Shell, static plumbing or evaporation still needs to be separated |
Why early diagnosis matters
Repeated topping up wastes water, dilutes salt and chemicals and can hide soil movement around the pool. A suction leak can also reduce circulation and cause a pump to lose prime.
What professional leak detection may involve
Depending on the evidence, testing may include pressure testing plumbing lines, dye testing fittings, inspecting the shell and checking equipment under different operating conditions. The first goal is to isolate the likely area before excavation or major repair.
If the pool is losing water, book our pool repairs and equipment assessment. We can first check the visible equipment and arrange specialised leak detection when required.
Not sure what you are looking at?
Send Pool Perfectionists a photo and a short description, or book a Sydney pool technician to inspect the problem properly.