Thanks for your reply. Another option is to buy water filtered by
machines
available in some major supermarkets, like the type of machine made by
Culligan

http://www.culligancommercial.com/explore.cfm/css/

How does their water quality compare to the home Watts RO systems?


Robert Gammon wrote:
wrote:
I am trying to decide between Watts Reverse Osmosis system
versus Watts Zero Waste RO system, sold by Sams Club and Costco
respectively (links below). Which one you recommend? Is it easy
to disconnect them after one year and move to another place?

http://www.samsclub.com/shopping/nav...=5&item=165779

http://www.costco.com/Browse/Product...&browse=& s=1


These are very very similar products and will both work extremely well
with city water supplies. It is a FALSE statement to say that the unit
sold at CostCo has Zero Waste water. It is likely to produce at leasst
one gallon of waste water (brine) for each gallon it produces.

The two units appear to be otherwise identical, EXCEPT the one at CostCo
includes a permeate pump. The silver and black cylinder shown in the
background and its power supply lying in the foreground raise the
pressure on membrane to 70-75PSI. This increases the production rate of
the membrane significantly, so recovery time after draining some water
is much faster.

One thing to keep in mind is that water pressure and water quality are
significant factors affecting the output rate of a RO unit. Water
quality is important, to remove silt, and to remove the chlorine present
in most city supplies. A 75 gallon per day membrane when equipped
with this pump, can deliver up to 50 Gal/Day with good water quality.
The same system minus the pump will produce only about 25 Gal/Day.

Moving one from one place to another will be a problem. You get water
to these units by tapping into the cold water line under the sink.
Removing the unit will require inserting a valve to close off the water
to the unit when you disconnect it. You also have the issue of the
waste water line, which must also have a valve to shut it off when you
remove the unit.

I do not have a Watts RO, but I have been an RO user for 10 years. Don't
want to EVER go back. Will include a whole house RO in my new house
(under $3000)