Product specifications

In general, the higher the pressure (up to 100 PSI), the better the performance of the membrane at
rejecting contaminants. Pressures below 40 PSI will result in poor rejection rates and may reduce the
service life of the membrane.
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 to be residual chlorine when
it reaches your tap. Typically, the residual concentrations of chlorine in household water range from 0.5
to 1.0 parts-per-million (ppm).
Besides being toxic, chlorine will degrade the TFC reverse osmosis membrane. Therefore, it is essential
to remove chlorine from your feed water before it reaches the RO membrane. Your BEV system includes
a pre-fi lter containing a special grade of granular activated carbon (GAC) which will very effectively
remove the chlorine from your tap water. It is important to replace the pre-fi lter annually to insure no
chlorine is reaching the membrane.
Sediment
In areas with very high sediment concentrations the pre-fi lter may clog prematurely. If the pre-fi lter be-
comes clogged, you will likely notice a decrease in the production rate from your system. In areas with
very high sediment concentrations, it may be necessary to replace the pre-fi lter on a semi-annual basis.
Iron
Iron concentrations greater than 0.1 mg/l can degrade overall system performance. If your water supply
has iron concentrations above 0.1 mg/l, iron pretreatment is recommended.
Getting to Know Your BEV System 12