In other words, the check valve there now keeps the water from flowing
back into the underground reservoir. When you add the hand pump, you
need to add another check valve in the pipe going to it to prevent the
electric pump from sucking air through the hand pump instead of water
from the ground. Both check valves are to stop back flow.
I'm assuming you want a way to get water when power is out??
Who comes up with these questions ? I need to know what he means by a 40'
well. A hand pump has limits as to how high it can lift. Then, if the lift
isn't too great, I envision a T in the main line and a shutoff valve between
the T and the hand pump.
Depends on the pump - 1 of those little $15 short handle pumps, you
are correct - the larger long handle, long stroke with tight pipe and
good check valve, you are wrong. We use to hand pump from 60 feet
down to a tank on a platform 20 feet up before we got electric power.
We did finally hook a single cylinder gas engine to a jack stand to
operate the pump before getting electric to the farm. It would fill a
1000 gallon tank using 1/2 gallon of gasoline!! Yes, I'm talking about
a loooong time ago!!
Look at the 100L hand pump. The one we had back in the 1930's
wouldn't lift 500 feet like this will but it DID do what I said it
did!! Some people just don't have a clue and all they know to do is
turn on the faucet.
Those systems place the pump down in the well within 22' of the water. You
obviously are not aware of the physics or mechanics involved with pumping
water. The atmosphere will only support a column of water about 29' high.
It's exactly the same as a mercury barometer. The atmosphere will support a
column of mercury about 30" high and no more.
It's you that hasn't a clue.
Okay, I've been following this thread, admittedly not knowing (or
rather, not remembering from school) the maximum height a column of
water could be without assistance.
That being said, I distinctly remember the old-style hand pumps... the
kind you find in state camping grounds, and used to find in highway
waysides, and people who had them on wells with a water table WELL below
So, I did a little checking, and came up with this table:
http://www.aermotorwindmills.com/handpumps.htm (there's a nice table
about halfway down the page).
Am I wrong in thinking this is a standard hand pump, or is this NOT
what you and Tom are talking about?
I'm not talking about different pumps. The pumps are all the same. The pump
you linked to is placed down in the well-close to, or in the water.
The 22' is not dependent on manufacture or design, it is the maximum height
of a column of water that atmospheric pressure will support. I didn't come
up with that figure; some scientist 400 years ago did. Please catch yourself
The 2nd picture down is the shape of the pump we had on the farm that
did lift water from 60 feet down and pushed it 20 feet higher to a
tank. As the data table shows, those old style pumps were capable of
bringing water from 100 to 200 fett down!!
You have observed well - those are the type pumps that most windmills
were connected to all across the country before electricity was
brought to almost everyone.
The differences in hand pump depth lift depends upon whether the pumping
mechanism (the pipe, rod, and piston) is lifting the water or sucking it
up. If below the surface, yes, the water can be lifted to many heights,
because it is lifting (pushing up) the water, rather than sucking it up.
If the piston is at ground level, then the piston has to first evacuate
the air from the pipe which causes a vacuum in the pipe. It doesn't
matter whether the pump is hand powered or motor powered. The vacuum
created by evacuating the air is replaced by the water that the ambient
barometric pressure pushes down on the surface of the water.
When in the Navy, my battle station was damage control. We used a
portable water pump called a Handy Billy. It had a gas engine that drew
water from a long hose that was dropped into the flooded area. It's
maximum lift was listed as 30 feet. If the water level in the flooded
area was more than 30' from the pump, then the Handy Billy could be
moved to a lower deck that was within the 30' limit, if possible, and
its discharge could be hosed to a higher level and over the side, or
through discharge ports in the side. The pump then becomes a lifting and
The most use of the discharge port that was in our shop was to wrap a
piece of wire around our AM radio antenna and hang the other end out the
port, so we could pick up a signal. :-)
The Handy Billy could also be used to fight fires when the ship's power
was lost, drawing its water from the sea (as long as the sea level was
not more than 30' below the pump), and using the discharge hose as a
There are two kinds of pumps in this discussion. If the pump depends on
suction only and everything but the pipe is above the water, you can not
pump more than around 30 feet vertically. You are creating a vacuum and are
depending on the atmospheric pressure to push the water up the pipe.
If parts of the pump are below the water level , then is is mostly a
function of how much power or force you have to move the water. It can be
much more than 30 feet.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.