DRAIN VALVES. Seven drain valves are located at the left front of ROWPU. They are used to draw samples at
various stages of purification and to drain water from unit before moving.
Figure 2-9. Drain Valves
CHEMICAL FEED PUMP VALVES. Valves have two positions: PRIME and RUN. PRIME is for priming chemical
feed pumps, and RUN for adding chemicals.
Figure 2-10. Chemical Feed Pump Valves