Properties of Water1 (for NPSH calculation Ch.9)

DegF Absolute Vapor Pres. Ft.H2O
60 0.59
70 0.89
80 1.2
85 1.4
90 0.70
100 0.95
110 1.27
120 1.69
Altitude Ft. Atmospheric Pressure Ft. H2O
0 33.9
500 33.3
1,000 32.8
1,500 32.1
2,000 31.5
2,500 31.0
3,000 30.4
3,500 29.8
4,000 29.2
4,500 28.8
5,000 28.2
















1. Abridged from tables 23 and 24 of the Hydraulic Handbook, 6th edition.
Note: 1psi=2.31ft.of H2O = 2.04" Hg. = 51.8Mm.Hg.