Posted: 5/11/2016 6:56:33 PM EDT
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When they drill a well, why do they put the pump at the bottom of the well? It would seem to me that it would be easier to service/replace if the pump was placed above ground. I'm sure there's a good reason for this, so I'd like to hear it. |
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Lets say you have a 100' bottom fed well with a static level of 80' making 10gpm.
If you set your 10gpm pump at 50 you are going to drop the static level below the pump intake in a few minutes. (drawdown) If you put it at the bottom of the well you will always have the full capacity of the well to pump from. Even more so if you have a low producing well. Sorry re-read your post. Because above ground pumps suck... Centrifugal and jet pumps, loose prime and oxidize minerals, iron -etc and cause issues with jet assemblies down in the well -Plugs them up. Submersibles don't loose prime and typically don't change the water condition. |
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Okay, never mind. I googlfied it. While a jet pump can reliably handle a well several hundred feet deep, a more effective solution is to move the pump down into the well so, instead of lifting the water, it's pushing it up. A typical submersible pump is characterized by a long cylindrical shape that fits inside the well casing. The bottom half is made up of a sealed pump motor that is connected to the aboveground power source and controlled by wires. The actual pump half of the unit is comprised of a stacked series of impellers-each separated by a diffuser-that drives the water up the pipe to the plumbing system.
In modern installations, the well casing outside the home is connected to the plumbing system by a pipe that runs beneath the ground to the basement (see Submersible Pump System diagram). This horizontal pipe joins the well pipe at a connector called a pitless adapter. The function of the adapter is to permit access to the pump and well piping through the top of the well casing, while routing water from the pump into the plumbing system. While submersible pumps are more efficient than jet pumps in delivering more water for the same size motor, pump or motor problems will necessitate pulling the unit from the well casing-a job that's best left to a pro. However, submersibles are known for their reliability and often perform their role 20 to 25 years without servicing. Submersible pumps may also be used in shallow wells. However, silt, sand, algae and other contaminants can shorten the pump's life. |
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A guy in South America back in the 70's invented a pump that could draw water up past 33 ft.
It featured a pipe with a one-way valve at the bottom and another up near the pump. The pump sets up a standing wave inside the pipe. When the wave troughs at the bottom valve, some water comes in. When the wave peaks at the top valve, a similar amount of water goes out. It would not create any real static pressure, but a backing pump could provide that. It was demonstrated pulling water up 5 stories to the roof of a building. |
| Our above ground pump at the cabin has been giving us poor efficiency since 1994. We do drain it in the winter if we are gone but rarely do we have to prime it. If we do prime it, it takes about 1/2 gallon of water. We also keep a 40 watt candesant bulb lit during the winter near the coupling. Well pump just hasn't been an issue for us. |
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Quoted:
A guy in South America back in the 70's invented a pump that could draw water up past 33 ft. It featured a pipe with a one-way valve at the bottom and another up near the pump. The pump sets up a standing wave inside the pipe. When the wave troughs at the bottom valve, some water comes in. When the wave peaks at the top valve, a similar amount of water goes out. It would not create any real static pressure, but a backing pump could provide that. It was demonstrated pulling water up 5 stories to the roof of a building. Interesting. Sounds like gravity and atmospheric pressure put to use? |
| My well had leaks from cheap pipe which caused the submersible to work for months nonstop around the clock (REALLY not supposed to do this) once the problem was diagnosed we pulled everything up replaced all the cheap pipe and used the same pump ..its been running (only when needed) like a champ ever since |