Rain water tanks

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tataminodani
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Rain water tanks

Post by tataminodani »

Inspired by the gasoline tank question. :D

I want to set up some rain tanks eventually and was wondering where to get those steel ones I see around the place outside some apartment buildings. Square with multiple panels bolted together.

We took a trip to Okinawa recently and I noticed that almost every building there has these nice shiny water tanks on their roofs as well. But I have never seen that same type in mainland JP.

Every time I try to search I get plastic ones or non-japan ones.

I'd prefer not to use a plastic one other than short term or with the plants only, as we have enough micro-plastics in our diet and water as it is. But I suppose I could hide a couple of IBC pallets in the shade behind the house if I have no other options. :think:

Would deep shade be enough to stop algal growth? Or does it need to be pitch black.

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DocDoesFarming
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Post by DocDoesFarming »

From what I understand they need to be pitch black.
I write a load of bollocks, don't take me seriously.

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Zasso Nouka
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Rain water tanks

Post by Zasso Nouka »

Something like these Steel Tanks ? Or these Steel Tanks ? But I suspect both of those will be somewhat overpriced.

Have a look through the solar water heater thread as I seem to remember Iain using tanks for drinking water but possibly he imported them or I could be misremembering that. I think his tanks had some sort of airflow or something to stop the water souring or again could be misremembering.

tataminodani
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Post by tataminodani »

The first link I had already found, but they looked like industrial purpose. That's a LOT of steel in there.

The second one is what I am after. Thanks. Your search fu beats mine.
DocDoesFarming wrote:
Mon Nov 27, 2023 7:18 am
From what I understand they need to be pitch black.
Cheers. What I feared. Might have to paint them or something then for long term storage. Or chlorine tabs.
Zasso Nouka wrote:
Mon Nov 27, 2023 7:48 am
Have a look through the solar water heater thread as I seem to remember Iain using tanks for drinking water but possibly he imported them or I could be misremembering that. I think his tanks had some sort of airflow or something to stop the water souring or again could be misremembering.
Cheers also. I will go take look.

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gonbechan
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Post by gonbechan »

the only one i could find for sale to general hoipoloi (Zasso's link is for sekisiu company's system wotsit) is this
https://store.shopping.yahoo.co.jp/anah ... =slga_fpla
the price would make you cry enough to fill the tank i reckon.

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Post by czaujapman »

Great question I wanted to ask this myself here in the past... but I knew there wouldn't be many answers I liked... so I did not :D
Japan certainly is a far cry from Australia when it comes to watertanks, I guess it's because the water here is fairly cheap and plentiful (compared to other places). There are so many choices in AU, below are 2 that I still remember:
https://www.tankworld.com.au/ or https://kingstonwatertanks.com.au/
“My technique is don’t believe anything. If you believe in something, you are automatically precluded from believing its opposite.” ― Terence McKenna

tataminodani
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Post by tataminodani »

gonbechan wrote:
Tue Nov 28, 2023 5:06 pm
the only one i could find for sale to general hoipoloi (Zasso's link is for sekisiu company's system wotsit) is this
https://store.shopping.yahoo.co.jp/anah ... =slga_fpla
the price would make you cry enough to fill the tank i reckon.
Whoa more than ¥1,200,000 for that bathtub sized thing?

That is eye-poppingly expensive :shock:

Thanks though.
czaujapman wrote:
Tue Nov 28, 2023 6:15 pm
Great question I wanted to ask this myself here in the past... but I knew there wouldn't be many answers I liked... so I did not :D
Japan certainly is a far cry from Australia when it comes to watertanks, I guess it's because the water here is fairly cheap and plentiful (compared to other places). There are so many choices in AU, below are 2 that I still remember:
https://www.tankworld.com.au/ or https://kingstonwatertanks.com.au/
I know right! My cousin ran a tank company for a while in Aus and for $10k AUD you could get a corrugated steel tank bigger than your house :lol:

I may need to rethink things if this is what it will cost :think:

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Post by Savot »

Might be something to add to the list of 'things that are cheaper to import from overseas', along with woodburners. Here's a modular flatpack one: https://www.alibaba.com/product-detail/ ... 13a0Gcgd88.

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Post by tataminodani »

is that the cost per panel? or for 6 panels? :think:

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Post by Tora »

You might check with a kaitai business that does industrial demolition. They might be able to hook you up if you’re in no hurry.

I got 3 200liter poly barrels for ¥500 from a local fruit juice processing place and daisy-chained them together to save rain for my garden.

I saw another local recycler was selling big food grade stainless steel tanks that look like they came out of eco-cutes for pretty cheap. You could daisy chain a few of those together if you can weld and if you can’t weld you’ll never survive in a post apocalyptic world.