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Brian Whatcott wrote in
: Wandering around the local Hardware, I came across a sink/faucet filter system billed as reverse osmosis. Cost is $200 operating pressure 40 to 80 psi. What's the scoop on this: can it handle salt water? [it carries a warning to avoid water of unknown quality, unless pre filtered with salt? - sounds doubtful ] Thanks for insights Of course it can. Buy a Brita filter, which says it filters out everything except distilled water, pump the holding tank into the top of it and you get fresh, pure drinking water for only $20 from Wally World..... Our city is recycling sewage through a whole roomful of Brita filters and feeding it back into our faucets. The water comes out with only 3 ppb impurities, better than my distiller! C: SARCASM OFF C: To answer your question, if you put city water into any filter, even one that uses toilet paper as a filtering agent, you'll get pure city water out of it... If the city water contains dissolved acids, salts (like NaCl) or any other really tiny molecules, they'll flow right on through, maybe bumping a fiber or two as they all flow between them. If there's **** in the city water, it'll filter that out, but not the toxins from it which are also too tiny to "filter". Even REAL RO filters don't filter out ANYTHING that's smaller than the holes in the membranes, something they don't like to talk about. Recently, many RO operators got sick from biologic toxins released by the bacteria that were piled up against the filtering membrane, broke down, and released toxins that were too small to filter. RO is just a fine filter, you know.....smaller than NaCl, it seems. Pure water comes from DISTILLATION, not filtration. Even distillation isn't "pure". If the water contains impurities that will distill, like benzene that's in all water, you must STILL filter out the benzene and other distillates from the output of the distiller. Luckily, these distillates are all carbon based and are easily attached to activated carbon, permanently. All distillers, including mine, have an activated carbon filter to suck out the distillates. If you buy distilled water from a grocery store in the water department, it will taste "metallic" when you drink it from the distillates. If you buy Dasani, or one of the other distilled water drinks, it's been filtered by carbon and the metallic taste of the distillates is gone. My latest batch from my distiller measures 2.1 ppm total dissolved impurities. I think that comes from the collector pitcher being made of polycarbonate plastic. At 4000 volts, as high as my hypot tester voltage goes, two 6" long rods 2" apart only conducts 2.8 microamps....(c; THAT's pure water.....for about 25c/gallon at 10c/KWH. What I don't understand is we have this really HOT engine charging the batteries that DOESN'T have a built in steam distiller making drinking water. Pity..... -- There's amazing intelligence in the Universe. You can tell because none of them ever called Earth. |
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