I am interested in buying a zero loss reverse osmosis water filter for
our kitchen. Watts seems to be the only one who makes one.
Anyone have any experience with these, pro or con? They operate
differently from regular reverse osmosis filters in that they have an
A/C powered pump as part of the system.
Or you could adapt any of the RO systems to dump the brine into the hot
water supply, as Watts does.
The excess water goes into the hot water line. I considered this but
wondered if it might be corrosive for potable water lines and hot water
I agree RO is usually overkill. It covers paranoia for people who are
mixing baby formula, etc., and the minority with real issues such as too
much sodium or arsenic. If one is on city water, it's worth noting that
RO removes fluoride. My familyis on a well with undetectable amounts of
fluoride, so it was a non-issue.
I do not believe the claim that removing minerals from water harms
health. One gets the vast majority of these from food, not water.
Imagine how much hard water one would need to drink to get adequate
calcium... There was however a study which linked reduced hardness to a
reduced recurrence of heart attacks in individuals (see
http://news.bbc.co.uk/1/hi/health/3396141.stm ). While I believe this
merits additional study, I don't think one should jump to conclusions
about health dangers of soft (or RO) water or supposed benefits of
drinking hard water.
On Sat, 19 Feb 2005 15:15:43 -0600, email@example.com (m Ransley)
The waste water is pumped into the hot water line. How it
accomplishes that I haven't figured out yet. Seems like swimming
against the tide.
The unit being considered reduces Arsenic(v), Cysts, Barium, Cadmium,
Chromium, Copper, Fluoride, Lead, Radium 226/228, Selenium, TDS, and
Turbidity. In addition, bad tastes and odors, such as chlorine, can be
virtually eliminated. I don't see anything on the list that my body
can't do without.
Note that reverse osmosis is the filtering system used by
manufacturers in creating the bottled water that seems to be as
prevalent as cel phones in our society.
That's why it has a pump. The brine flows into the hot water line,
displacing some of the water contained in the water heater tank into the
cold water line. Which of course then flows back into the inlet of the
The waste water flows in a loop. It is injected into the hot water line
under pressure and migrates back towards the water heater. Displaced
water flows out of the cold water inlet of the water heater through the
cold water line and back to the RO system. Of course, if you never use
any of the hot water (i.e. in a shower, to wash dishes, etc.) then
eventually the RO system will start to receive previously processed
waste water at it's inlet, and that will cause the RO membranes to have
a shortened life. But for most practical purposes the 'zero waste'
system should work fine.
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