Pool leak detection FAQs
Practical answers for Perth pool owners dealing with an unexplained falling waterline.
How can I tell if my pool is leaking or evaporating?
Compare the pool’s water loss with water in a partly filled bucket placed safely on a pool step under the same conditions. Mark both levels and check them later. If the pool drops noticeably more than the bucket, a leak may be present. Rain, splashing, auto-fill systems and backwashing can affect the result.
How much water can a Perth pool lose to evaporation?
There is no fixed daily amount: heat, wind, humidity, water temperature, exposure and cover use all matter. Water Corporation advises that an uncovered pool can lose around 45,000 litres a year and that a cover can reduce water use by up to 250 litres a day during summer.
Why does my pool water level keep dropping?
Possible causes include evaporation and splash-out, filter backwashing, leaking equipment, failed seals, pool plumbing, skimmers, return fittings, lights or a defect in the pool shell. The loss pattern helps determine where to start.
Can a pool leak when the pump is off?
Yes. Water may escape through the shell, fittings or some plumbing sections even when circulation is off. If loss changes significantly when the pump operates, that is also useful diagnostic information.
Where do swimming pools commonly leak?
Potential areas include pump and filter connections, underground pipes, skimmers, return jets, lights, cleaner sockets, fittings and cracks or defects in the structure.
Why are there bubbles in my pool returns?
Persistent air bubbles may indicate air entering the suction side, a low water level, obstruction, loose pump lid, damaged seal or plumbing issue. Bubbles alone do not confirm a water leak, but they are worth mentioning.
Should I drain my pool to look for a leak?
No—not without specialist advice. Draining can damage certain pool structures and finishes, and groundwater pressure can create serious problems. Testing is usually undertaken with water in the pool.
Will leak detection include the repair?
Leak detection focuses on locating or narrowing down the likely source. Repair requirements depend on what is found and may involve an appropriate pool equipment, plumbing or structural repair specialist.
Authoritative sources
General water-saving information is supported by Water Corporation’s pool evaporation guidance and its advice on high household water use. These links provide general information and do not diagnose a specific pool.