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Learn about water hand pumps! This 3D animated video teaches you about manually operated water hand pumps and how they work.

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▶️Introduction
Hand operated water pumps are a common site in many rural areas. They are common because they are easy to install, work well, are easy to operate, and are very robust (require little maintenance). This type of pump is a positive displacement pump; it can pump slurries, liquids and gases.

Water Hand Pump Parts / Water Hand Pump Components
There are various designs of hand pump, but the usual parts include:
Piston / Plunger
Cylinder / Casing
Suction
Discharge
One-way Valves (foot valve and in piston)
Handle
Piston Rod

How Hand Pumps Work
The user presses the handle down, which causes the piston to move upwards. As the piston moves upwards, it creates a negative pressure in the cylinder and water is drawn upwards into the cylinder via the foot valve. When the handle is pulled up, the piston moves downwards, and the piston check valve opens allowing the water to pass through the valve as it moves downwards. When the piston is moving downwards, the foot valve at the base of the pump is closed, but it opens when the piston moves upwards. This causes water to flow upwards through the cylinder as the piston moves upwards, but no flow through the cylinder occurs as the piston moves downwards.


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