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Old 09-24-2010, 07:10 PM   #1
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pump size

I have a 120gal saltwater tank with a sump.What size pumps would I need to put in the sump to push water about 6-7ft to the outlet flow tubes in the tank
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Old 09-24-2010, 07:57 PM   #2
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use this to figure out what you need:Head Conversion Factors:1 psi = 2.31 feet head
1 foot head = 0.433 psi
Now chose the pump you want and then go for the size of pump in that make to suit your needs.
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Old 09-24-2010, 09:26 PM   #3
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what is your overflow rated for?
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Old 09-24-2010, 09:48 PM   #4
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I am not sure.The overflow is built into the middle of the tank and then it has one return on each side
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Old 09-24-2010, 09:55 PM   #5
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what size is the drain? 1"? 1.5"?
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Old 09-24-2010, 10:30 PM   #6
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1.5
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Old 09-25-2010, 06:29 AM   #7
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well, i can't remember the exact numbers, but i think a single 1.5" drain can handle about 1200gph or so, after head loss. anything larger than that will have to be choked back (at the pumps exhaust port, not the intake).
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Old 09-25-2010, 08:41 AM   #8
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Old 09-25-2010, 04:55 PM   #9
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so if a pump says its 1585gph at 13ft lift,that would work?
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Old 09-25-2010, 06:56 PM   #10
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if it's putting out 1585 gph at 13 feet, you'll have to choke it back some, but yes, that would be a good choice. contrary to popular opinion, choking a pump back is not bad for it. as a matter of fact it lengthens the pump life, and will use less electricity. just remember to put the ball valve at the exhaust port, and not at the intake. you don't want to starve it for water.
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