Or you can do what I do: Add a purifying agent (I use iodine) to the water and let it sit before filtering it. Takes the taste of the chemicals out.
And I've actually pumped (in training) the bigger RO units used in bigger rafts...they're not suitable for most use either.
Emergency Medicine - saving the world from themselves, one at a time. "Thou shalt not be a victim, thou shalt not be a perpetrator, but, above all, thou shalt not be a bystander." I make the ADL soil themselves. And that makes me very happy 
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