2-9. OPERATING PROCEDURES - cont.
Fill Backwash (Brine) Tank. Refer to figure 2-62. During operation of the ROWPU, brine water is produced
by the R.O. process. The brine water leaves the ROWPU through the BRINE coupling on the control panel.
The brine water is stored in the backwash tank for use during the backwash cycle and for cleaning R.O.
Allow backwash water tank to fill during operation of the ROWPU. Tank should be filled to within 3
inches of top of tank.
VENT VESSELS and WASTE hoses must be placed at least 25 yards down stream of raw water intake.
When backwash water tank is full, remove the brine hose draped over the top of the tank. Allow
excess brine to drain from the hose onto the ground.
Allow brine hose to drain until water in backwash tank is used for the backwash cycle, then put the
hose back into backwash tank until full.
Continue to periodically check water level in brine tank during operation.
Make sure backwash tank cover is installed (TM 5-5430-227-12&P/TO 37A12-1-121).
Figure 2-62. Fill Backwash Tank.