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Re: [pct-l] More Filter Issues

At 10:29 AM 8/26/99 -0700, Greg Hummel wrote:

>them.  They are membrane separation systems.<snip> and due to weight and
>power they are certainly not something that you are likely to try to carry
>on your back!

PUR (the filter people) make a "portable hand-operated system" that does
R.O. but they are fairly heavy, slow and cost alot. OTOH you should be able
to drink horse piss.


http://www.providenceco-op.com/waterfaq/waterfaq.htm says
PUR manual watermakers are available in two models: The Survivor 06 ($500)
produces 2 pints per hour, and the  Survivor 35 ($1350) produces 1.4 gal/hr.

Using reverse osmosis to desalinate seawater requires considerable pressure
(1000 psi)
<snip> While there is little question that the devices work well, the
considerable effort required to operate  one has been questioned by some
survival experts such as Michael Greenwald, himself a survivor of a
shipwreck. On the other hand the people who have actually used them on a
life raft credit the availability of water from their PUR  watermaker for
their survival. 
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