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Old 02-07-2003, 11:15 PM   #1
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water pump trouble

Ok, we got the thing plumbed, all minor leaks tweeked out. Had the sump water at the water line, poured water through the return line to help prime the Little Giant pump. Plugged it in....quiet noise, not enough I think, and no water movement at all. It gets hot within about 30 seconds and we shut it off and tried it again...no banana. It is not sucking water at all, no dropping of water line, no suction at the bushing. Is anyone familiar with these that may know what is going on?
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Old 02-07-2003, 11:17 PM   #2
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Sounds like it has air in the impeller. Let it run for more than 30 seconds. Sometimes they will work themselves out of it in a minute or two.
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Old 02-07-2003, 11:20 PM   #3
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By putting water down the return line, you may have actually trapped the air in. If there is a elbow on the pump intake (plese tell me the sump is drilled for the pump and doesn't go over the side) take it off. You can also try pumping water into the intake with a powerhead (this works also when it goes over the side of the sump...instead of through).
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Old 02-07-2003, 11:30 PM   #4
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The sump is drilled. it is a straight shot, about 8 inches from the sump to the pump. When we poured the water in, it would flow all the way through the pump and into the sump. we wanted to make sure it was not running dry. The pump gets VERY hot and smells hot within a short amount of time, is it ok to run it for a few minutes if water is not flowing through it?
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Old 02-07-2003, 11:35 PM   #5
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Well...don't tell anyone. But when I worked for the fish store, it was a PITA to unplug the Lil' Giants to the racks...so I would leave them running during waterchanges. I think it'll be OK. I wouldn't do it for more than a minute or two thoght, and I really would try the ph trick. Just because the waterflowed into the sump...dosn't mean you got all the air out of the pump.
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Old 02-07-2003, 11:38 PM   #6
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GIving it a shot right now...will let you know how it goes, have a ph handy circulating the liverock anyway.
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Old 02-07-2003, 11:39 PM   #7
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^
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Just cause I thought you could use a laugh
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Old 02-07-2003, 11:51 PM   #8
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no banana. we had a hagen pro 4 powerhead blowing water in, left it running a good couple of minutes, I even took a hammer and gently tapped the body of the pump in case some piece of trash or something was blocking the impeller. Not even a trickle offered to flow through.
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Old 02-07-2003, 11:53 PM   #9
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Hmmm, take the pump back. When you get it unhooked from the sump, plug it in and see if the impeller spins.
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Old 02-07-2003, 11:53 PM   #10
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cute guy, does he do water pumps?
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