A piston pump or what is often called a reciprocating pump is a water pump that moves back and forth. The way this pump works is to create a pressure difference at the inlet and outlet.
So this pump is useful for sucking and pushing liquid to move it somewhere. This piston pump is usually used for water. This movement system is almost the same as the piston movement of vehicles in general.
The difference is in the cylinder chamber as well as the piston used to suck and push liquid. Meanwhile, if the piston in the vehicle is used as a combustion chamber to drive the entire engine in the vehicle.
We often encounter reciprocating pumps when they are in wells or other water areas. By using this pump you don't need to use a pulley anymore to get water.