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Islandlife
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# Posted: 18 May 2017 06:05am
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Hello,
I need a new pump to get water from our lake to a holding tank periodically. Since I am spending the money now should I get a submersible pump for in the lake (long skinny ones) or a shallow well jet pump that goes on the shore? There is about $140 difference in cost between the two with the same hp rating.
I am leaning towards the submersible so I don't have to prime the pump or build a little shelter for a pump by the water but am looking for advice.
Thanks
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bldginsp
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# Posted: 18 May 2017 08:35am
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Not sure how to install a submersible in a lake. I doubt you can just lay it on the lake bed. Should be suspended above the lake bed so it doesn't pull sediment. How would you do that? But I think you're right, once installed, the submersible is easier to maintain. But the jet, once installed, is easier to replace. Seems like a tradeoff.
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Islandlife
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# Posted: 18 May 2017 09:44pm
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I am thinking of putting the submersible in a section of abs(or is it PVC) pipe with capped ends and lots of holes along the length of it. I would then suspend it from a marker boy maybe 6' below the surface and off the bottom a bit.
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old243
Member
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# Posted: 18 May 2017 10:35pm
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That might work, depending on the size of the holes in the pipe . If your lake is weedy they could clog up. Personally I think I would lean toward the shallow well pump ,you could still suspend your foot valve up a bit on a bouy. Do you have this for year round use or will you have freezing problems.old243
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Islandlife
Member
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# Posted: 18 May 2017 10:56pm
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Right now we are just seasonal and I don't se that changing in the future.
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bldginsp
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# Posted: 19 May 2017 08:49am
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One very important point with submersibles (if you go that route) is that they need to be cooled by water running alongside the motor. Depending where you put the holes in the pipe, you could arrange it such that little or less water gets pulled by the motor than by the impeller. In this case, with the motor encased in a pipe, it could overheat. I would put most or all of the holes in the pipe such that most or all the water must be pulled past the motor. This is a serious issue in deep wells with larger HP motors.
But maybe a jet pump is best for your situation.
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old243
Member
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# Posted: 19 May 2017 09:05am
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Another thing to consider, with the submersible pump , the electrical conductors would have to probably either taped to the intake hose or in a second pipe to protect them. You may have a condition , when the pump starts , the torque of starting , could damage the cables ,eventually, I think the shallow well pump might be simpler , in the long run. jmho old243
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BCcabin
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# Posted: 21 Jun 2017 03:41pm
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I've installed this submersible pump stand in my system, and so far it is working well with 2 years of use. I made my own from 4" ABS for much cheaper than this one costs. The holes drilled are done in such a way as to create flow across the body of the pump to keep it cool, I also installed a torque arrestor to make sure there isn't any twisting going on inside.
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