1-13. COMPONENT PRINCIPLES OF OPERATION-cont.
BOOSTER PUMP (8). Electrically driven, centrifugal pump increases water pressure to the cartridge filter.
CARTRIDGE FILTER (9). Removes small suspended solids that pass through the multimedia filter. Solids are
trapped on eight replaceable cartridges filter tubes inside the filter body. Elements should be replaced when
cartridge filter gage differential pressure rises above 20 psid.
R.O. PUMP (10). Electrically driven high pressure pump increases system water pressure to the R.O. pressure
tubes for operation of the R.O. process.
PULSE DAMPENER (11) (Models WPES-10, WPES-20 and WPES-30 only). A cylindrical metal tank
installed between the R.O. pump and the R.O. pressure tubes removes pulses in water flow caused by the
reciprocating action of the R.O. pump pistons.
R.O. PRESSURE TUBES (12). The four fiberglass R.O. pressure tubes each contain two R.O. elements. Water
entering the R.O. pressure tubes is under high pressure. The semi-permeable R.O. elements use the high pressure to
separate (strain) dissolved solids from the filtered water. Product water is removed from the center of the elements.
Dissolved solids are flushed out of the R.O. pressure tubes as brine.
PRODUCT WATER TANKS (14). Two 3,000 gallon collapsible water tanks store product (potable) water
produced by the ROWPU.
DISTRIBUTION PUMP (15). Pumps and distributes potable water from the product water tanks to user
DISTRIBUTION NOZZLE (16). Controls water flow from the distribution pump. Used for filling small hand
held containers or portable water tanks.
BACKWASH WATER TANK (18). Collapsible 3,000 gallon water tank stores brine water produced by the R.O.
process for use during the backwash cycle and cleaning R.O. elements.
BACKWASH PUMP (19). Pumps brine water from the backwash water tank to the multimedia filter for operation
of the backwash cycle. A strainer connected to the outlet of the backwash pump removes large particles of debris
that may have entered the brine water tank.
1-22 Change 2