My understanding may be wrong, but I’m fairly sure I’ve seen water pumps moving up and down or back and forth. Wouldn’t that produce little bursts of water? How does it get so smooth and consistent?
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I would say several things here. First, many pumps are not piston-style displacement units that generate pulses of flow, but instead are continuous units like rotary pumps (many sump pumps are rotary units, for example, so no pulsing flow). You can and will see pulsing from a displacement pump (like a standard air-powered diaphragm pump used for emptying ponds at a construction site, for example), unless you get so far from the source that the flow is smoothed by pulse attenuation due to friction and pressure equalization.
The point is that pumps come in different “styles” (functional designs) and some do have an inherent pulsation to the operation, and some do not. Even when the pumping is pulsations, though, the flow will eventually smooth out, depending on how far from the source you go and what the system is like through which the flow is passing.
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