The reverse osmosis membrane used in this system can tolerate significantly higher concentrations of
oxidizing contaminants like iron and manganese than RO membranes found in other systems, as well
as a much higher degree of hardness. However, there are limitations—the operating parameters for
this membrane are found in the Specifications section of this manual.
Deionization Module
This proprietary module contains a unique blend of deionization resins carefully matched to our reverse
osmosis membrane and provides superior rejection of monovalent ions, fluoride, and nitrates; con-
taminants only partially removed by reverse osmosis. Including deionization after reverse osmosis sets
BEV systems apart from other purifiers.
Following the DI resins, there is even more granular activated carbon to polish the product water for
a clean, fresh taste. The flow rate at this stage provides tremendous contact time to assure complete
removal of any remaining organic contaminates.
The final stages of our proprietary DI module are included to prevent the reverse migration of contami-
nates into the system. These stages further separate BEV systems from other brands. After carefully
combining the previous components it is essential to integrate these stages to ensure 99.999% removal
of bacteria, cyst, and virus
(EPA EST. No. 52531-FL-01).
These stages also prevent any contaminants from enter-
ing the system via the faucet.
OpERAtiNG pARAMEtERS
To insure proper operation of your BEV system, it is advisable to collect the following information about
your water supply. This information is generally available from your municipal water department, and
in many cases is available from the website of your local Department of Public Works.
pressure
In order to overcome the natural osmotic force, adequate water pressure must be available from your
water supply. The osmotic force is directly proportional to the concentration of dissolved solids in the
water. When the water pressure is equal to the osmotic force, there will be no movement of pure water
molecules across the semi-permeable reverse osmosis membrane. A minimum of 45 PSI is required.
(If your water pressure is below 45 PSI, a booster pump is available. If you are on a private well, have
your plumber raise the minimum pressure above 45 PSI.)
In general, the higher the pressure (up to 100 PSI), the better the performance of the membrane at
rejecting contaminants.
ph
The TFC membrane will hold up very well when the pH of the feed water is between 3 and 11. Water
supplies with pH over 11 are very rarely, if ever, found. (Chlorine bleach has a pH of ~11.5.)
Chlorine
Chlorine is the most common substance added to municipal water supplies. Its purpose is to eliminate
biological growth (i.e. chlorine is toxic). Regulations usually require there be residual chlorine when
14 Getting to Know Your BEV System
