Page 179 - Water and wastewater engineering
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4-34 WATER AND WASTEWATER ENGINEERING
Pump
discharge
pipe
Vented sanitary
well seal Casing
Concrete
pad
0.1 m
Bore hole
Grout
seal
100 d drawdown
NPSH A
NPSH R
Submersible pump
1.5 m
Screen
FIGURE 4-13
Placement of pump with respect to drawdown, height above screen, and NPSH R .
Note: With the NPSH R and NPSH A shown, the pump could be set at a higher elevation.
