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plp 3000 or pac 3100 one is mag drive and the other is direct drive first one is cal pump second one is alpine?? which one is gonna be better pond will be 8'x8' and 3 ft deep with a 1.5' deep by 3 ft wide stream coming from a waterfall aprox. 6 ft from the pond. Will have a skippy style filter in it.
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7 replies to this topic
#2
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- Location:Fairfield, OHIO
Posted 02 February 2010 - 12:30 AM
any help on this?? anyone explain which is better mag or direct drive?
#3
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- Location:Fairfield, OHIO
Posted 03 February 2010 - 01:10 AM
no one huh? i know someone here can help me with this but i dunno what to do?
#4
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Innovator
- Location:Escondido, Ca USA
Posted 03 February 2010 - 01:28 AM
It could be that no one here has any knowledge of these pumps. I only use submersibles and never heard of these.
I will guess that mag drive is an impeller driven by magnets that are reacting to the motor that has magnets on its shaft. If it is, stopping the impeller would not fry the motor.
On a direct drive, if you stall the impeller, you fry the motor. If this is true, then the mag drive would obviously be a better investment.
I will guess that mag drive is an impeller driven by magnets that are reacting to the motor that has magnets on its shaft. If it is, stopping the impeller would not fry the motor.
On a direct drive, if you stall the impeller, you fry the motor. If this is true, then the mag drive would obviously be a better investment.
DrDave
“Wisdom is not a product of schooling but of the lifelong attempt to acquire it”. Albert Einstein
http://drdaveskoi.tripod.com
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“Wisdom is not a product of schooling but of the lifelong attempt to acquire it”. Albert Einstein
http://drdaveskoi.tripod.com
http://plansbyjorde.tripod.com
#5
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Posted 03 February 2010 - 02:10 AM
dr dave thank you for the reply that is basically the only thing i wanted and needed to know which one is more reliable. Thank you again
#6
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Innovator
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Posted 03 February 2010 - 02:23 AM
This is an educated guess. Where I work, we have 2 shaft turbines and the 2 shaft are the safest since a stall on the output will not suddenly stop our turbines. At 10 million $ a turbine, that could be catestrophic.
DrDave
“Wisdom is not a product of schooling but of the lifelong attempt to acquire it”. Albert Einstein
http://drdaveskoi.tripod.com
http://plansbyjorde.tripod.com
“Wisdom is not a product of schooling but of the lifelong attempt to acquire it”. Albert Einstein
http://drdaveskoi.tripod.com
http://plansbyjorde.tripod.com
#7
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karps house of koi
- Location:Tampa Bay Florida
Posted 03 February 2010 - 02:12 PM
I use 3 mag drive 1800 in my 4000 gallon pond. I constructed baffles out of 2" PVC pipe, cut into 16" lenghs with 1/4" holes drilled into it and a plastic screened cap on the end. This is better then the foam pre filter that comes with the units, and doesn't need cleaning as much. I will take a pic if you want. Plus it is a safety feature for small fish(they cant get stuck to it) My pond was just set up again and is still cycling but watter quality is good I just have green water at the moment untill the bio filters build up.
I like the mag pump for there efficiency as well. Much cheaper then the old pool pump I was using for my waterfall.
I like the mag pump for there efficiency as well. Much cheaper then the old pool pump I was using for my waterfall.
#8
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- Location:Oregon - zone 8b
Posted 03 February 2010 - 08:25 PM
I figured someone else would have answered you with a little more knowledge than me. It is my understanding that mag drives are generally more efficient in terms of watts/gallon moved. Direct drives are more often seen on the larger pumps. I think there is another advantage to the direct drives, but it is not occurring to me at the moment.
