Pumps - Suction Head vs. Altitude

The suction head of a water pump is affected by its operating altitude.

Elevation above Sea Level	Pressure	Practical Suction Lift
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

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Pumps - Suction Head vs. Altitude

The suction head of a water pump is affected by its operating altitude.

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Scientific Online Calculator

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