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Old 02-13-2005, 09:09 PM   #1
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overflow

Grr...well i feel like a big noob now. I have everything set up except for how do i get the water from the hob overflwo to work. i can't get the thing to siphon.
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Old 02-13-2005, 09:23 PM   #2
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i put air line tube up into it and sucked

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Old 02-13-2005, 09:27 PM   #3
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while the u tube is in the water?
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Old 02-13-2005, 09:30 PM   #4
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Fill both sides of the overflow with water. Put your U tube in place. Use the airline tubing to fish one end into the top of the U bend. Suck out all the air from the top of the U bend. Your siphon should be good to go.
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Old 02-13-2005, 09:31 PM   #5
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Yes. Put a small air line tube up into the U at the top. Turn your pump on and then suck into the air line tubing. This will start the siphon. Suck real hard to you remove any air in the U tube.
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Old 02-13-2005, 09:38 PM   #6
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omg thank you so much....ur a life saver...i finally got the plumbing right..yay
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Old 02-14-2005, 07:40 AM   #7
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Keep in mind what will happen to your tank if the power goes off, the siphon breaks, and then the power comes back on. there are "aqualifter" pumps which are cheap, and built to draw out this bit of air in such an event.

Try to think of all the failure modes in your setup. Do you have enough room in your sump that if the return pump fails, it won't overflow? What if a snail crawls onto your overflow tube?
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Old 02-14-2005, 08:47 AM   #8
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there are "aqualifter" pumps which are cheap, and built to draw out this bit of air in such an event.

Can you provide a link? I need one big enough to handle 2 overflows.
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Old 02-14-2005, 12:44 PM   #9
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If the U tube is done right, it should not lose siphon when the pump stops.
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Old 02-14-2005, 01:38 PM   #10
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If the power is out for an extended amount of time, the main will drain into the sump until the siphon is broken because the water level is too low. The problem arises when the power comes back on and the pump returns water to the main but there is no siphon in the overflow.

The result. . . water everywhere until the sump is dry.

I'm tagging along too, would like to find out about the aqualifter pump
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