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A water powered sump pump having an ejector with an inlet end and a discharge end and enclosed within a housing providing support for the ejector. A control chamber about the inlet end of the ejector has a diaphragm valve which operates to control communication with a water pressure source responsiv

A water powered sump pump having an ejector with an inlet end and a discharge end and enclosed within a housing providing support for the ejector. A control chamber about the inlet end of the ejector has a diaphragm valve which operates to control communication with a water pressure source responsive to operation of a float controlled pilot valve. Multi-stage turbulence and progressively increasing energy and velocity is effected in sump water directed to a propulsion zone defined about the ejector nozzle and communicating with the mouth end of a venturi leading to a discharge outlet from the ejector.

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A water powered sump pump having an ejector with an inlet end and a discharge end and provided with an intermediate propulsion zone, means for effecting communication of a continuous water pressure source with the intake end, and float controlled valve means for normally closing the inlet end and op

A water powered sump pump having an ejector with an inlet end and a discharge end and provided with an intermediate propulsion zone, means for effecting communication of a continuous water pressure source with the intake end, and float controlled valve means for normally closing the inlet end and openable to permit the water pressure to enter the inlet end and effect operation of the ejector when a predetermined rise in water level occurs in an associated sump, the improvement comprising: sump water intake structure arranged to direct sump water to flow into the structure through an entrance arrangement and then on through the structure substantially uniformly to the ejector, for ejection from said discharge end by operation of the ejector; said intake structure having means for effecting turbulence in, and for progressively increasing the energy throughput and velocity of, the sump water as it flows from the entrance arrangement to the propulsion zone, so that maximum sump water pumping efficiency is attained; and means in said propulsion zone for effecting turbulence and substantially eliminating boundary layer drag. A method of pumping in a water powered sump pump having an ejector with an inlet end and a discharge end directed into an intermediate propulsion zone, and including effecting communication of a continuous water pressure source with said intake end, normally closing said inlet end with float control valve means, and opening said valve means and permitting water pressure to enter said inlet end and effect operation of the ejector when a predetermined rise in water level occurs in an associated sump, and comprising: in the operation of the ejector causing sump water to flow into a sump water intake structure through an entrance arrangement and then on through the structure substantially uniformly to said propulsion zone; effecting turbulence in and progressively increasing the energy throughput and velocity of the sump water into said intake structure from said entrance arrangement to and through said propulsion zone, and thereby attaining maximum sump water pumping efficiency by operation of said ejector; and substantially eliminating boundary layer drag by effecting turbulence in said propulsion zone.