from The Century Dictionary and Cyclopedia
- n. The distance through which atmospheric pressure has to lift water for a pumping-apparatus on the suction side of the pistons or plungers. The limit is 32 feet at sea-level and usual barometer heights: but any leakage of air or any cause preventing the pressure on the water in the suction-pipe from being reduced to zero will reduce this limiting value. It is best not to count on much over 20 feet under practical conditions.
Sorry, no etymologies found.