On that web site is says:

#
"We begin with a First Stage Pre-Filter, which
removes particles in the water down to 5 microns.
This sediment filter is designed to protect the
membrane from fast deterioration."
#


This just removes dirt and other particles.

#
" The Second Stage Filter is a combination of a
copper-zinc alloy (KDF) and Activated Carbon, which
removes chlorine and other organics and helps
prevent bacteria and algea growth. "
#


This removes more stuff from the water, making it
more drinkable.

#
"The Third Stage Filter is a T.F.C. (Thin Film
Composit)
Membrane, to ensure the highest level of rejection"
#


This is an RO unit using "Thin Film composite"
abbreviated as "TFC" So if you do a search on the
different types of membranes you will see the
advantages and disadvantages of the different
membranes. Kent Marine (http://kentmarine.com) has
documented a lot of good information on the
different types of membranes.


The reason that the system has other filters before
the RO is just like with any RO unit, if you don't
filter out the bigger stuff, it will quickly clog
the membrane, and some membranes will be damaged by
chlorine if it is not removed. Your homework
assignment is to read up on the different types of
RO membranes and become familiar with the
differences :-)


Wayne Sallee



Dave wrote on 9/10/2007 12:14 PM:
On Sep 10, 8:57 am, Wayne Sallee wrote:
It helps to have the brand name, company name,
company address, company phone number, web address,
e-mail address, and such for searching such
information about some product number "KDF-55".

Wayne Sallee


- Show quoted text -

This is the link for the company's RO system that I am planning on.
It doesn't have DI, just RO. The company is Aqua Solutions in Los
Angeles.

http://www.advancedaquasolutions.com/5-stage.html