Day: April 2, 2017

Cleaning the gunk out of our water tanks

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It’s coming up on eight years since we installed our first 5000L water tank, put in during drought conditions. Since then we’ve added two more tanks as part of the renovation.

Over Christmas, when we had three dry months, our tanks dropped to nearly empty. They also started to stink, clearly the results of anaerobic decomposition of the plant material washed off our roof. Smelly water feeding into the washing machine, not good!

Our setup has first flush diverters, designed to capture the first lot of dirty water that flows into the gutter. They’re not magic, however, and gunk still gets in to the tanks, and builds up over time.

In the country, where households have to rely exclusively on their water tanks, it’s routine to get them cleaned out every while. I haven’t heard of it being done in the city, however. This might be because most of the tanks were put in at the same time as us, or later, and the problems are only now starting to emerge.

When we were out at a country show, we collected a business card from Leigh’s water tank cleaning, who we talked into dropping by our place when he happened to be heading into the city. We also talked to the Water Tank Cleaning Company who operate throughout Sydney (their website was down at the time of posting).

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Leigh, showing off his tank cleaning setup

Leigh was very friendly, the the process is surprisingly simple. It’s basically a hand-manoeuvred version of a pool cleaner, which is steered around the base of the tank where the gunk has accumulated.

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This is the dark brown water flowing out, at force, from our tanks

It’s somewhat horrifying to see how much dark brown water gushes forth. No wonder our water filters kept getting clogged up, trying to deal with all that!

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This is the view down into one of the tanks: the white area is the bit that’s been cleaned…

It’s a quick process, and within half an hour, our two main tanks were done. That should keep them going for a few years…

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