DIY - Projects & Ideas • sump for non-drilled tank.

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sump for non-drilled tank.

Postby sirdavidofdiscus » Mon Jan 09, 2012 7:36 am

how do you get around the issue of siphon loss in a nondrilled tank? e.g. power loss restart the sump would run dry without the siphon.
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Postby Jim in Michiana » Mon Jan 09, 2012 8:00 am

Gotta use a "siphon box"

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Postby sirdavidofdiscus » Mon Jan 09, 2012 9:44 am

So is that small tubing at the top of the U coonected to the return from the sump?
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Postby Number6 » Mon Jan 09, 2012 11:05 am

Even the DIY pvc overflows can be made to restart after the pump starts again... They just copy the overflow principles shown in the diagram above.
My WC cichlids are gonna be caught on rod n reel!
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Tubing

Postby sprigsss » Thu Jan 26, 2012 6:14 pm

Don't understand the need for the tubing in a deisgn such as this. If the power fails the water will only drain to the bottom of the "L" Shaped Tubing. You shouldn't loose prime in the Siphon Tube. I would think having the tube would only lead to problems, as if you loose prime you may overflow the main tank.
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Postby Rick_Lindsey » Fri Jan 27, 2012 2:54 pm

The little tube is for getting the siphon going in the first place, not after each power failure. Generally you put a check valve there so that air can't get back in. It scares me. I'd be more inclined to just stick an airhose up into an unadulterated U-tube and suck the air out to start the siphon in the first place (or the painful effort of filling the tube with water and then inserting it, without losing any of the water). I believe some people hook that little line up to the venturi of a powerhead, so even if it does leak some air back in it'll get sucked out when power comes on? I dunno though, I've never used one.

-Rick (the armchair aquarist)
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Postby Rhinox » Fri Jan 27, 2012 3:15 pm

Rick_Lindsey wrote:I believe some people hook that little line up to the venturi of a powerhead, so even if it does leak some air back in it'll get sucked out when power comes on? I dunno though, I've never used one.

-Rick (the armchair aquarist)


now thats a clever idea. Hadn't heard that one before.
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