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Quality small reverse osmosis survival H2O filter?

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Quality small reverse osmosis survival H2O filter?

Old 08-31-2017, 05:19 PM
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Default Quality small reverse osmosis survival H2O filter?

I have been thinking it would be nice to have a small "survival" type RO H2O filter in case of an emergency. Although I keep 10 cases of bottled water on hand a backup would be nice to have. I have looked online but not seen anything promising.

Need enough capacity for 2 people and 2 cats. I live on a canal on the Banana River so I have a permanent supply of accessible but dirt and salty water. I have a generator but think a manual unit would be better if the SHTF from natural or man made causes.

Any suggestions from the THT collective brain trust?
Old 08-31-2017, 05:36 PM
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Not reverse osmosis but we have used our Berkey Light filter throughout Mexico, and use it for our drinking water on Cozumel. Works great.
Old 08-31-2017, 06:11 PM
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Originally Posted by skibum View Post
Not reverse osmosis but we have used our Berkey Light filter throughout Mexico, and use it for our drinking water on Cozumel. Works great.
Looks like a quality unit but it does not appear to be for salt water.
Old 08-31-2017, 07:58 PM
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My buddy that shares my building with me makes saltwater (aquarium service business) and has an RO system to purify our tap water.
I was looking at it the other day and it looks a lot like the systems on boats.
I'll ask him about it when we return from holiday weekend.
Old 08-31-2017, 08:24 PM
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We have an RO system for drinking water at the house because the well water has about 350ppm saline content. It has a booster pump and is rated at 100gal/day but we only have about 6 gallons of storage for it. Which is plenty as it makes up pretty quickly. It supplies a couple sink taps and two reefers for ice as well. Ours reduces the saline content to 15ppm, a factor of 20 or 25.

Seawater is 35 parts per thousand or 35000ppm. A system like ours (sold for household or small business use) would not work well enough for seawater. You would need a series of such devices to get to potable water. Or a higher efficiency system.
Old 08-31-2017, 08:33 PM
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I'm curious, I thought desalination and RO systems were completely different
Old 08-31-2017, 08:47 PM
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My friend Lee reps a company that makes 12 volt watermakers. http://leewardgenerator.com/

Old 09-01-2017, 04:10 AM
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Get in touch with "TheBigWhit" on here. He does this all over the world
Old 09-01-2017, 07:57 AM
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Buy a used marine freshwater maker. Drop a hose in the river, other hose into some jugs. You said you have a generator so that takes care of the power issue.

Any household RO system would get destroyed pretty quick.
Old 09-01-2017, 01:00 PM
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A household or freshwater ro system runs at about 50 psi or regular city water pressure. A seawater ro system needs around 750 psi to operate. Totally different systems. A seawater ro system is neither simple nor cheap. There is a manual survival seawater ro purifier, but it is expensive and only does the minimum required for basic survival. Much simpler to just buy some more bottled water.
Old 09-01-2017, 05:14 PM
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Originally Posted by Koocanusa Sam View Post
A household or freshwater ro system runs at about 50 psi or regular city water pressure. A seawater ro system needs around 750 psi to operate. Totally different systems. A seawater ro system is neither simple nor cheap. There is a manual survival seawater ro purifier, but it is expensive and only does the minimum required for basic survival. Much simpler to just buy some more bottled water.
Well said. If you need a RO system you have much bigger problems going on. Better off with a still to make distilled water.
Old 09-01-2017, 06:54 PM
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Life straws. Cheap and effective. You can drink from a puddle. 1000 liters per straw

You don't need RO to purify or desalinate water. Read up on ways to evaporate it in the sun and recollect it (a frame visqueen tent for example) or distill it.
Old 09-02-2017, 06:15 AM
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I thought about reusing the watermaker we are about to take off of the boat but then again, it is problematic on the boat, why would it be less problematic on land?
Old 09-02-2017, 08:50 AM
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Originally Posted by Koocanusa Sam View Post
A household or freshwater ro system runs at about 50 psi or regular city water pressure. A seawater ro system needs around 750 psi to operate. Totally different systems. A seawater ro system is neither simple nor cheap. There is a manual survival seawater ro purifier, but it is expensive and only does the minimum required for basic survival. Much simpler to just buy some more bottled water.
The manual survival type is what I am interested in. It would be a backup to the 10 cases of bottled water I keep on hand all the time.

Anyone know of a quality manual survival seawater ro purifier?
Old 09-02-2017, 10:14 AM
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go to eBay they have plenty, look under "desalination"
Old 09-02-2017, 09:22 PM
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One option is the Katadyn Survivor 06 Desalinator or the Survivor 35.

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