There is no reason other than available space that precludes putting an RO system in a remote location and plumbing it to wherever you need the water. By system I mean carbon prefilters (essential if there is chlorine or chloramine in the water, or any silt), RO membrane filter, nominal post carbon filter, and storage tank, at a minimum. More complex setups are often used. See Spectrapure's website among many others for examples. The plumbing over longer distances is most easily done with 3/8th-inch food grade polyethylene tubing, connected with John Guest type fittings. Portage Specialties, among many sources, has tubing and this type of fitting for sale. Just cut the tubing to length and push to connect. My RO system is plumbed to feed a centrifugal humidifier, a future family room counter area, a plant watering wand, two kitchen sinks and a refrigerator icemaker RO filtering can leave water slightly acidic, which promotes corrosion of some faucets. This depends on the nature of the water being filtered. I recently determined that my RO water is still alkaline after filtering alkaline pre-treated municipal type water, so I don't have a problem of that sort. If acidic, then another "filter" is needed on the exit end of the RO system that contains limestone chips to neutralize the water. Simple RO systems avoid all this by using plastic and stainless steel faucet parts. The approach I recommend is determine what you want the RO water for and how much you will use, peak and average. Then find a system that will accommodate those requirements. kas

astridh -- my husband is better suited to answering your question but from what I remember him telling me: RO water is not just corrosive to the tank / pipes / tube (I think he said "tank" but I'm including it all in case I've forgotten) in an insta-hot, it is dangerous to the drinker. (it's dangerous because what the RO water corrodes is carried through the water supply to your cup of tea) He really wanted RO water and I really wanted just one faucet. So, we're going with just one faucet that does insta-hot AND filtered water. We've decided to live with it a while and see if the filtered water is good enough. If it is, great. If it's not, then I guess we'll either have to reassess (and get another faucet) or be prepared to frequently replace the insta-hot tank. I wish I had more details for you -- when I talk with him later I'll ask to see what pertinent info I left out. I found a panoply of great-looking faucets -- Brasstech and Little Gourmet (Mountain Plumbing) both have a slew of styles and finishes. (We purchased a Little Gourmet faucet and insta-hot tank -- I think it's a Culligan filtered water system?)

Does anybody have a water filtration unit that does "reverse osmosis (RO) combined with a superior carbon filter"? Ive done some research - but would really like to hear from others. Leaning towards RO and carbon based on EWG article (http://www.ewg.org/.../ewgs-water.../filter-technology). I think we would be best suited to something with its own faucet at our sink.

I know they now make a tankless RO filter. Does anyone have any experience with this? If not does anyone have a conventional RO system they would like to recommend? Thank you .