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- HOW YOUR REVERSE OSMOSIS SYSTEM WORKS -
PREFILTER
Water from the cold supply pipe enters the RO as-
sembly prefilter first (FIG. 8 and schematic below).
The prefilter has a replaceable sediment cartridge
with activated carbon in its composition. The car-
tridge (10 micron) removes sand, silt, dirt, other sedi-
ments, and up to the ppm of chlorine shown in the
specifications from the feed water. Chlorine will de-
stroy the RO membrane. Filtered, clean, chlorine-
free water flows from the prefilter, to the RO mem-
brane cartridge.
IMPORTANT: See prefilter maintenance, page 11.
REVERSE OSMOSIS (RO) CARTRIDGE
The cartridge inside of the RO housing, is a tightly
wound, special membrane. Water is forced through
the cartridge and the membrane removes the dis-
solved solids and organic matter. High quality prod-
uct water exits the RO housing and goes to the stor-
age tank, or to the postfilter and RO faucet. Reject
water, with the dissolved solids and organic matter,
is routed through the flow control and to the drain.
STORAGE TANK
The storage tank holds up to 2.3 gallons of product
water. A diaphragm inside the tank keeps water
pressurized to about 30 psi, when the tank is full, to
provide fast flow from the RO faucet. The tank is
pressurized to 5 - 7 psi.
POST'FILTER
After leaving the storage tank, but before going to the
RO faucet, product water goes through the postfilter.
The postfilter is an activated carbon type filter. Any
remaining tastes and odors are removed from the
product water. Taste-free, odor-free, clean, high
quality drinking water is available for use.
FAUCET
The sink or countertop faucet has a hand operated,
spring-loaded closed lever to prevent the waste of
drinking water. You can also keep the faucet open by
pushing upward on the lever and locking it against
the faucet spout.
To comply with plumbing codes, an air-gap is built
into the faucet drain water connection.
SHUTOFF ASSEMBLY
To conserve water, the drinking water system has an
automatic shutoff system. When the storage tankhas
filled to capacit_ and the drinking water faucet is
closed, pressure doses the shutoff to stop flow into
the RO. After drinking water is used, and pressure in
the system drops, the shutoff opens to allow water
flow again.
CHECK VALVE
A check valve (FIG. 10) is located in the outlet end of
the RO housing, opposite of the cap. The.check valve
prevents a backward flow of product water from the
storage tank. A backward flow could rupture the RO
membrane.
FLOW CONTROL
Water flow through the RO membrane is regulated
by the flow control. Itmaintains the desired flow rate
to obtain the highest quality drinking water. The
flow controlis located in the end of the 1/ 4"red drain
tubing, at the RO housing drain port. A small cone-
shaped screen fits over the end of the flow control to
help prevent plugging with drain water sediments.
PRODUCT
WATER
FAUCET
a_rgap._
gravity
drain
REVERSE OSMOSIS
drainflow SCHEMATIC
RO MEMBRANE
PRODUCT WATER
WATER GREEN
IN
check
valve"_
A OMAT,C
SHUTOFF [_
EFIL'[_R | __OC_ 1F LTER
• 10
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