John Salmon, 11/04/2025

Wild weather is raging again, and South East Queensland is on high alert. You’ve followed all the advice and now you’re sitting cosy, ready to Netflix and chill, but a glance outdoors tells you all is not well with your pool.

An incorrect pool water overflow connection will make your toilet gurgle.

Water is lapping wildly at the edges, and you hope the rain stops before it overflows. But then a sheet of heavily chlorinated water escapes the pool and starts flowing directly towards your wife’s prized roses.

This is when you realise that immediate action is needed before those roses – and you – are toast.

You select the overflow function and feel confident that your woes are soon to be over. That is, until shouts of horror from indoors alert you to a new problem.

It seems the toilet’s gurgling like a sadistic, hungry cookie monster and the kids won’t go near it. And what’s that AWFUL smell??

As if that wasn’t enough, the water is still backing up outside.

What’s going on?

Storms, pool water overflow and gurgling toilets

If your toilet is gurgling during a storm, the most likely explanation is that excess rainwater – and possibly pool water overflow – is inundating the sewer system. When the system is overloaded, water can flow back up the pipes, pushing trapped air towards your toilet. The result: gurgling water and unpleasant smells.  

Can I discharge pool water to the sewer or stormwater systems?

Under normal circumstances, pool owners are encouraged to reuse pool water, where possible. Get in touch with your plumber to discuss possible ways to reuse pool water and how to set up your plumbing system to do so. For example, pool water can be safely reused for flushing toilets.

If you need to drain significant amounts of water from your pool, you’ll need to check with your local council about what the rules are around discharging pool water to the stormwater system or the sewer network. In many cases, you’ll need to apply for a permit.

Will draining my pool make my toilets overflow?

The good news is that no, draining your pool is unlikely to cause the toilet to overflow. Other aspects of the town’s drainage design are a much more likely cause if the loo does flood.

The bad news is that most councils have regulations prohibiting you from diverting your pool water into either the sewerage or stormwater systems deliberately during a flood event.

What can I do?

The only thing you can do right now is monitor the pool and toilets for any additional changes. You’ll have to sit tight until the flood event passes, after which, an assessment of your plumbing systems will help avoid this happening again in future.

How to prepare a pool for potential flooding in Brisbane

With future severe weather events predicted to become more likely in the coming years, now is the time to future-proof your plumbing and preparation plans.

Start with a full Drainage Assessment to identify areas you can improve before the next storm season arrives. Work with your plumber to develop strategies to deal with pool water overflow and minimise flood damage on your property.

Here are some ideas to consider:

  • Drain your pool before major weather events, reducing the amount of water in it to allow for the predicted rainfall.
  • Have sandbags on hand to prevent backflow through toilets and drains. These can come in handy elsewhere on the property if the rains get heavy.
  • Ensure your sewer drain is in good working order, with no existing blockages.
  • Consider the best ways to reuse pool water and design your system to give you options.
  • Determine how water moves on your property and undertake drainage improvements if issues are identified.

Take advantage of our full backyard drainage design service, and next time torrential rains arrive, you can kick back and watch the game while the excess water flows away – no problem.

Avoid pool water overflow woes! Call Salmon Plumbing for a comprehensive Drainage Assessment BEFORE the next summer storm season hits.