Posted by Ray on May 17, 2009, 20:52:41, in reply to "Jet Pumps"
65.41.237.195
How is the pump attached to the well? If there is a well head with two bolts holding the pump in place it is a deep well pump, there will be two holes in the end of the pump where it is attached to the well head. If the well pipe is screwed into a single hole in the end of the pump it is a shallow well pump.
The determining factor in which is used is the water table and not the depth of the well. If the water table is within 20 feet of the surface a shallow well pump can be used on a deep well pipe. A shallow well works kinda like sucking water up through a straw, so it only needs one hole in the end of the pump where it mates to the well. Since water is heavy it can only be lifted up 20 to 25 feet.
For deeper wells two pipes are used, one is inside of the other. The well forced water back down one of the pipes to the ejector unit that is at the bottom of the pipe and through the venturi effect sucks up water and forces it back up to the pump. This pump is somewhat more complicated, but it needs to have two holes in the end of the pump where it mates to the well head. One orfice pushes water back down into the well the other one is pulling it back up.
Hope this all makes sense. And if it is a name brand pump your local pump company should be able to match up the model number of your pump to something newer. You can also leave the pump in place with some pumps and just remove the motor with 4 bolts and overhaul the motor and re-install it. Have done that in the past for $60-70.
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