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Pump Suction Head and Altitude

The suction heads of pumps are affected by altitude

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Practical pump suction head is affected by altitude:

Elevation above Sea Level		Pressure			Practical Suction Lift
(ft)	(m)	(psig)	(ft H₂O)	(bar)	(ft H₂O)	(m H₂O)
0^*	0^*	14.71	33.95	1	22	6.7
1320	402	14.02	32.38	0.97	21	6.4
2640	805	13.33	30.79	0.92	20	6.1
3960	1207	12.66	29.24	0.87	18	5.5
5280	1609	12.02	27.76	0.83	17	5.2
6600	2012	11.42	26.38	0.79	16	4.9
7920	2414	10.88	24.13	0.75	15	4.6
10560	3219	9.88	22.82	0.68	14	4.3

^* Sea Level

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