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What is the difference between an ejector pump and a sump pump?

What is the difference between an ejector pump and a sump pump?
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  1. An ejector, jet or eductor pump (all names for the same thing, some for gas, some for liquid) uses a sonic jet in the case of gases and a very fast jet in the case of liquids to entrain the slower flow and pump it up somewhat in terms of pressure, therefor increasing the total flow in the eductor loop. So we sacrifice a lot of energy in the fast stream, at realatively lower flow, to achieve the boost.

    A sump pump is a (generally) positive displacement pump intended to clear liquid from a sump, or gravity-fed inlet plenum. Could you use a jet pump as a sump pump? I suppose so, but the small orifice would have a nasty tendency to clog up in silty sump water, from my past direct experience with the basements of Spokane, WA.

    Respectfully,

    jack

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