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Hassel free overflow $7.50
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Bob Kripfgans View Drop Down
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Joined: November 13 2004
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Points: 1084 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bob Kripfgans Quote  Post ReplyReply Direct Link To This Post Topic: Hassel free overflow $7.50
    Posted: April 17 2005 at 12:05pm
Look what I found members with non drilled tanks. I am always worried about a break in my siphon.          ;           ;           ;           ;    http://www.aquariumadvice.com/viewtopic.php?t=13892&high light=zflowtubes. I'm on my way to Home Depot!  I'll let you know how it works.
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dnellans View Drop Down
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Points: 842 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dnellans Quote  Post ReplyReply Direct Link To This Post Posted: April 17 2005 at 12:55pm
maybe i'm not quite following, but this is the exact design of of most overflows except this one does not provide a "nipple" in the first raised section (that goes over the tank wall) to remove air that can build up and thus break the syphon.  anytime you have a high point in a syphon system that is syphoning air saturated water, some air will build up over time and if you don't remove it it will eventually cause the syphon to break.  i don't see how this system is any different.  please correct me if i'm missing something.

-dwn
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Mark Peterson View Drop Down
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Points: 21437 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark Peterson Quote  Post ReplyReply Direct Link To This Post Posted: April 19 2005 at 4:30pm
My opinion is that design has too much resistance in the piping compared to my simple overflow design. It makes so many turns that the tank water has to be pretty high in the tank to drop 600 gph. This would require a larger safety margin in the sump because of the high volume of water draining down.
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fj40fax View Drop Down
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Points: 1261 		Post Options Post Options   Thanks (0) Thanks(0)   Quote fj40fax Quote  Post ReplyReply Direct Link To This Post Posted: April 19 2005 at 7:37pm

This is just a siphon.  It won't work.  The water level in the cups on either side of the siphon tube in a normal overflow is what keeps the siphon from breaking.  If the pump stops (power outage) with this design the siphon will break and overflow the main tank.  Air will get into the tube going over the side of the tank, if that happens the siphon will be lost.  Unless of course there is something I'm not getting, always a possibility.

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