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rainwater catchment

Plastic bottle water tank

Greg Amos

Posts: 53

Location: Colombia

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posted 10 years ago

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Way to go if you have too many plastic bottles lying around...

The technology has been improved by Andreas Froese: www.eco-tecnologia.com/

He builds also houses, parks,...

great stuff!

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Greg Amos

Posts: 53

Location: Colombia

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posted 10 years ago

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I post the picture again, because the link of my previous post seems broken.

Guarne-Tanque-en-construccion-280x210.JPG

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Lizzie Day

Posts: 18

Location: Victoria, Australia

posted 10 years ago

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A related use is to float part-filled plastic bottles in your dams to reduce evaporation. I recall reading about a farmer here in Australia who did that as it was the only economical way he could minimise losses to evaporation.

wayne fajkus

gardener

Posts: 3073

Location: Central Texas zone 8a

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posted 10 years ago

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Is there more info on this? Specifically what mortar is used to make it water tight. The link is not my language.

No such thing as too much water storage.....

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Troy Rhodes

Posts: 632

posted 10 years ago

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IF those are plastic bottles, I suspect the sun will eat them up in a very few years, rendering the tank useless.

Glass bottle walls could last for decades and decades.

Most beverage bottles are polyethylene, which will be steadily degraded by UV exposure, unless they use a lot of uv absorber/inhibitor. I doubt they do that for beverage bottles because of the expense and short anticipated lifespan.

troy

R Scott

pollinator

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Location: Kansas Zone 6a

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posted 10 years ago

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Yup, doesn't work with newer greener plastics for nearly as long. If covered with a skim coat to keep them out of the light, then it will. Similar as Earthships.

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Greg Amos

Posts: 53

Location: Colombia

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posted 10 years ago

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Here is an english video about the work of Andreas Froese: http://www.youtube.com/watch?v=BVCY3n8Tvjc

Indeed, the plastic bottles are covered once the infrastructure is built, so bottles will last a long time. I guess cement is used, that's how the tank is sealed.

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Gina Rann

Posts: 1

posted 1 year ago

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Then why are rainwater tanks made out of polythene?

Anne Miller

steward

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Location: USDA Zone 8a

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posted 1 year ago

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Welcome to the forum!

Rainwater tanks can be made of many different materials.

Concrete, metal, wood, fiberglass, and other materials.

It is up to the consumer to make good choices.

Many have to vote with their pocketbook.

Invasive plants are Earth's way of insisting we notice her medicines. Stephen Herrod Buhner
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Jason Nault

Posts: 70

Location: Issaquah, WA

posted 1 year ago

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The tanks i have are a lot thicker than a plastic water bottle (like 100x) and are made with UV stabilized polyethylene.

Gina Rann wrote:Then why are rainwater tanks made out of polythene?

Jason Nault, Washington, USA

Check out my rainwater catch and automated garden build at https://permies.com/t/168563/Building-rainwater-catch-system-irrigation

Mike Philips

Posts: 218

posted 1 year ago

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The static water pressure in a tank creates “hoop stress”. The material the tank is made from needs tensile strength to prevent the tank from cracking open. Ordinary cement lacks tensile strength. So for this reason, a free-standing cement/concrete tank is (always) reinforced with a material like steel.

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