Description

This is the part of the system that goes down the well below the water table. It’s a barrel with a plunger inside. When you pump on the handle of the hand pump, it makes the cylinder plunger go up and down. This forces the water up the pipe and out the hand pump. These cylinders are all brass with brass check valves and 2 leather brass plungers. Pick your cylinder needed by the depth-to-water (not the total depth of your well) that comes closest to your installation. This tells you what I.D. (inside diameter) cylinder you need.

Caution:

Be sure that the O.D. ( outside diameter) of the cylinder does not exceed the I.D. Of the well.

Table of hand pump data
Depth to water that can be pumped by average person and showing the three columns possible with 5″, 7-1/2″ and 10″ pin positions on the pump handle.
Cylinder size	5″ Stroke Depth to Water-Ft.	7-1/2″ Stroke Depth to Water-Ft.	10″ Stroke Depth to Water-Ft.
2	201	140	108
2-1/2	141	99	76
3	104	72	56
NOTE: Above calculations are based on 50lbs. applied perpendicular to the pump handle and includes the hydraulic lift with 10% added for leather friction and weight of rod at minimum mechanical advantage which occurs at midstroke.