you have the well or bore depth,
you have the static water depth and the draw down or recharge rate, of a well
the bore depth is the depth of the well it self, the water level or draw down depth is what the pump needs to pump, the recharge rate is the rate in which water flow into the well, so it limits the size of pump on can use in the well,
the heart of the "hand pump" is the cylinder, or the pump that is in the water,
the cylinder has check valves and some type of piston in it, to move the water, up the pipe (called the drop pipe), in the drop pipe is the (sucker rod), this connects the pump to the power source, on top of the ground,
the "hand pump" is a stand that usually attachés to the drop pipe and is hollow so that water can flow out of it in a spout, and a location for some type of leverage advantage (handle) to move the sucker rod and lift the water up the pipe,
In my opinion hand pumps are very expensive for what they do,
one is a flange to support it self on the well head (cosing),
2. to allow water to escape the well or pipe (tee and spout) and t
3. and attachment for a handle
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the deeper one goes the more water one is lifting so it take more power, to lift the water, so to make this work one reduces the size of the cylinder to lift less water to keep the lift in range of human effort, the other method is to reduce the stroke of the cylinder (in creasing the lever length), but you move the lever up and down maybe 24 inches and the cylinder rod is only moved a few inches,
(the weight of the water lifted is the number of square inches of the cylinder size, by the feet down to the draw down level of the water, times, 0.44 psi per foot,
say you have a 300 foot well and water is at 280 feet, the lift distance is 280 feet not 300, but for every square inch of cylinder (piston) you will have 123 pounds of water to lift plus the weight of the sucker rod (minus it bouncy in water),
so say you have 1 7/8" cylinder in the bottom of that well, you have about 2.67 square inches so the weight of the water would be about, 328 pounds of water to lift and say 75 pounds of sucker rod, so a total of 403 or so pounds,
so your leverage on your pump handle needs to reduce that to manageable effort,
so say your handle is 10 to one, when water is at the top of the well you will have to exert 40 pounds of weight to move the handle on the down stroke of the handle say you move the handle 40 inches from top to bottom, your only moving the cylinder 4 inches ever time,
the discharge rate of that 1 7/8" cylinder is for 4 inches of stroke is only .0480 gallons per stroke. it will take you 25 strokes to get a gallon of water out of the well with that set up with 40 pounds of exertion ever stroke on the lever,
there are smaller cylinders, (down to 1 3/8" and larger units as well.
to reduce the power requirements one can reduce the cylinder size, but the 1 3/8 cylinder would only produce .025 gallons per stroke, or 40 strokes per gallon,
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If you do go ahead with the plan, I suggest you take a 2 or 3 inch pipe or square tube and have a fabrication shop weld a flange on the bottom to support it and the spout on it, and the necessary lug to mount the handle pivots to and fabricate your own pump handle (the old cast type (baker manufacture) are in the at $600 rang last I looked,
at that depth to hand pump is not impossible but it will take a lot of work and produce little,
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my wells are in that range, I use two windmills and the 280 foot to water is on the max. end of the 10 foot aermotor mill, and one should be using 12 foot mills, that is a big mill, (have one in the
yard), measured by the diameter of the blades),
(for the expense, you may not be that much different looking at
solar pumps cost wise over the hand system,
the cylinder should use steel pipe not plastic, I used fiber glass sucker rods, there not cheap, but much more lighter and nearly float, (i used the 1 7/8" cylinder for maintenance, with a 2" pipe one can renew the leather by pulling up the sucker rods and not the pipe, to put in new leathers, (note this need to be done about ever year in heavy use and most likely ever two to three years regardless),
the truth is an eclectic submersible is much cheaper to put in and to maintain than a windmill and most likely a hand pump,
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now I have a electric submersible under the windmill cylinder, on one well, and normally use only the windmill, but if low on water I can power the other pump, and it is my "emergency pump". (they both are on one pipe),