How to know if your swimming pool is leaking

Losing water from a swimming pool is something that happens every day through evaporation, as well as splashing & backwashing. But what happens when you're losing more water than normal… and how do you know what 'normal' is?

According to Daisy Pool Covers the average pool in Brisbane will lose on average 4,464 litres every month over summer.

Read more about water loss and how you can save up to 57,000 litres each year with a pool cover

As a general rule of thumb, if your pool water level is going down by more than 3 centimetres each week in Summer or 1 centimetre in Winter without any swimming or backwashing, there is a high probability that you're losing water from another source.

Finding a leak in a swimming pool.

The most common and 1st place to check for leaks is your waste line exit (usually on the street) where your backwashed/waste water goes. If there is a small trickle coming out here this indicates that there is an issues with your multiport valve (MPV) and requires either one of our service technicians to fix or our experienced shop staff to explain the process in detail to you.

If there is no waste line leak, the next place to check is around your pump and filter. Your pool pump sucks water from your skimmer box and then pushes it into your filter and back to the pool under high pressure. This additional pressure over time can unseat the barrel unions that connect the pipes to the pump and filter and other connections.

By looking for wet patches on the ground, drip marks on equipment or the tell tail calcium trails from connections you'll quickly be able to isolate the source. Leaking connections can sometimes be fixed as easily as re-seating and lubricating o'rings as well as tightening (hand tight only) any loose connections.

Another regular place water will leak from is underneath your pool pump. This is a small yet regular drip when the pump is running and is an indication that the mechanical seal in the pump is faulty and requires a professional to replace.

As mentioned earlier the multiport valve (MPV) controls the flow of water through the filter. There is a collar that secures the MPV onto the filter that has an internal o'ring and usually a clamp to seal this connection. It's also a common spot where water will find a way out. Again, check this and re-seat and lubricate if necessary and check for cracks in the actual filter tank itself, cracks will usually result in very noticeable squirt of water or significant trickle while the pump is running.

Water under high pressure from the pump can also escape up through the MPV handle. Check for water here and consult your nearest Rode Pool Services store for more information on repairing.

Testing evaporation vs leaking

If there is no visible water or leaks on your pool equipment, we then suggest to test by filling a bucket of water, marking the level and date on it then leave it next to the pools skimmer box. At the same time, mark and date the water level inside the skimmer box and allow the system to run as normal for 24 - 48 hours.

If there is a noticeable difference (1 centimetre or more) in the two levels, with the pool being lower, it's time to consult a Leak Detector to find the problem.

Underground Pipe Leaks

Professional leak detectors use sensitive equipment to pinpoint leaks in underground pipe work that may have been damaged by tree roots or shifts in the ground separating or cracking pipework and repair with minimal intrusion to the area surrounding your pool.

At Rode Pools we have worked with a number of local leak detectors for over 30 years and trust their professionalism and workmanship. Contact us to be put in touch if you have tried these tips above and believe you have a leak that needs their attention.

If you have a story to share of your own pool leak, leave a comment below or let us know on our Facebook page.