Altitude

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Altitude	Barometric Pressure	Equivalent Head Of Water	Practical Total Suction Lift of Pump
Sea Level	14.70 pounds per square inch	33.95 ft.	25 ft.
1/4 Mile (1320 ft.) Above SL	14.02 psi	32.38 ft.	24 ft.
1/2 Mile (2640 ft.) ASL	13.33 psi	30.79 ft.	23 ft.
3/4 Mile (3960 ft.) ASL	12.66 psi	29.24 ft.	21 ft.
1 Mile (5280 ft.) ASL	12.02 psi	27.76 ft.	20 ft.
1 1/4 Mile (6600 ft.) ASL	11.42 psi	26.38 ft.	19 ft.
1 1/2 Mile (7920 ft.) ASL	10.88 psi	25.13 ft.	18 ft.
2 Miles (10560 ft.) ASL	9.88 psi	22.82 ft.	17 ft.

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