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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Not all pumps move up and down. This is a type called positive displacement pump. There’s another rope called dynamic pressure. [This](https://images.app.goo.gl/ZszLXh5cRcWdYEkEA) is a type of pump called a centrifugal pump. It works by flinging water outwards from the center of the pump to the outer edge using vanes. The water then flows out from an outlet on the outer portion of the pump.
These are actually more common and cheaper. Like you mentioned, they don’t pulse, but they also have fewer parts and are simpler.
And not all positive displacement pumps are up and down either. Some are based on screws or gears, not pistons. These are a lot smoother.
Edit: a lot of other piston pumps use a bunch of pistons, not just one ([like this](https://images.app.goo.gl/AoXKY8vfBLfVDFWE6)). this helps even things out.
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