Jgrucci
New Member
The run is about 500’, and elevation 50’. I would like a min of 10gpm. What kind of pump could be best for this, and would a deep well pump work? Thanks
I would like to draw water from a lake for a aquaculture project
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If you can put a submersible in the lake a 10 GPM, 1/2HP will do the job. If you cannot put a pump in the well, a jet pump will work, but it needs to be less than 25 feet in elevation from the lake level.
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Jgrucci
New Member
Thank you for your reply. This might be a dumb question, but can I use a deep well pump by just putting it in the lake, or does it need to be in a pipe to operate? Also it would be continuous use
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There are lots of ways to install a submersible in a lake. The pump can be floated just underneath the water. It can be set on a stand just off the bottom. Or it can be slid into a 4"-5" PVC pipe the same as if being used for well casing, it will just be mostly horizontal instead of vertical.
Here are pics of a few larger submersibles I have installed in lakes or ponds. There are a couple with subs on floats, another I made a little trailer that rolls down the bank into the water. Then the last one has several subs mounted upside down on a large metal float. When the air is let out of the metal float, the pumps sink to the bottom and stand out in a horizontal position.
Jgrucci
New Member
Thanks again for reply. Does the pump have to be in a casing to work, or can I suspend just the pump off the bottom? And are deep well pumps able to operate under continuous use?
Thanks
Yes deep well pumps are what you need. Even though it is surface water, the 50 PSI needed in the house is the same as 115' of lift. So a deep well pump doesn't know it is in a shallow lake, it thinks it is lifting 115' like it would in a 115' deep well. But yes the submersible needs to be in a flow inducer sleeve or shroud. This forces the water to go past the motor before going into the pump, keeping the motor cool. Without a cooing shroud, a submersible motor can overheat even when surrounded by millions of gallons of cool lake water.
Here is one more way people can put a submersible in a lake. This one need s flow inducer sleeve or shroud, but the way the pump is installed keeps it off the bottom of the lake or cistern.
GTOwagon
Member
Perhaps he wants to make fish sauce?
Rman
Master mechanic
The one thing with submersible well pumps in a lake is there is a serious Electrical Shock or Death for an unfortunate swimmer or fisherman
There MUST be a GFCI breaker or min a GFCI outlet powering the pump It has happened due to wires chafing or deteriorating etc....
There MUST be a GFCI breaker or min a GFCI outlet powering the pump It has happened due to wires chafing or deteriorating etc....
I have been putting submersibles in lakes, ponds, rivers, tanks for 40 years. Never had a problem with electrical danger. I have installed pumps up to 75HP and 480V in lakes. Once even hit the wire with the boat propeller. Just tripped the breaker and left a spark mark on the propeller.
Boycedrilling
In the Trades
Yeah, and here in Washington we had a fatal electrocution from a centrifugal irrigation pump setting on the bank of a river last summer. Lack of an equipment grounding conductor killed a teenager. He was wet from climbing out of the river. Touched the pump case. Became the grounding conductor and died.
There’s a whole section of the NEC that deals with Marinas for good reason.
That being said, I’ve put plenty of submersible pumps into lakes.
There’s a whole section of the NEC that deals with Marinas for good reason.
That being said, I’ve put plenty of submersible pumps into lakes.
Sorry to hear about that! Grounding is very important. I think a centrifugal on the bank is more dangerous than a submersible in the water.
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