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#4
11-12-2003, 05:35 AM
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DI may be nice but it is not nessasary. you need to take Chloramine out befor it reaches the membrain as chloriene will destroy a membrain pretty fast.
for this reason I have modified my RO to have a progressive prefilter (goes from 25micron to 1 micron) and then TWO chlorine block filters. then my dual membrains and finaly my DI (I don't think I would spend the money on a DI again living out here as the output from my RO is 0ppm befor my DI stage.) the problem with the west coast is we have a abnormaly high algae content in our water wich will plug up a 1 micron prefilter in no time. also we use chloramine which is harder to remove than chlorine. Carbon will remove it but there is a chance that using only one carbon block filter the dwell time will be to short in higher out put RO's for it all to be removed. This will lead to a premature membrain failure. My set up is a little extream (320GPD) but I would recomend 50 GPD as a minimum and 100GPD as a recomended starting point. If you get the 50 GPD you can always upgrade the membrain later to a larger one. Steve
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