I’m not positive… but I would say that once the pump has pulled the water up into the pipe it equalizes and creates a steady flow since the air was replaced with water. Saying that there’s gasket or diaphragm that’s continuously catching the water as you pump giving it a steady flow while the handles moving. Pausing the motion would cause the bursts. So the stream would flow as steadily as you pump it. Again not positive. It’s how I understand it to work though.
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