What do you think of this overflow setup?

[number1gsxxr]

I picked up a 75-gal tank that has (2) 1-1/2" holes and (2) 3/4" holes already drilled to fix the problem I've been having with my overflow box once and for all. I came across these plans on RC for an overflow that uses three drains. I guess the third drain acts as an emergency siphon. Has anyone used anything like this? This is my first time setting up a tank that is drilled. Is it worth drilling a third hole to copy this setup? I want to minimize the chances for a flood.

More details can be found here:
http://reefcentral.com/forums/showthread.php?s=&threadid=1310585&highlight=silent+overflow

 

[snowmaker]

Is similar to this which works excellent.
http://www.clubswam.org/forum/index.php?topic=1329.msg12081#msg12081

I don't see a need for valves or the flanged fittings under the top caps. Can drill a 1/8 hole in caps. I also like to use 1.5" flex pool vacuum hose for drain plumbing as the little ridges slow the water down, preventing it crashing at high speed into sump which makes less bubbles.

 

[number1gsxxr]

So you've used something similar? Do you recommend drilling a third hole?

 

[snowmaker]

So you've used something similar? Do you recommend drilling a third hole?

2, 1.5" drains will handle 1000gph easily. The need for a 3rd would depend on how much water return pump will move.
The pic I linked to is one of my tanks.
I think if it were mine, I would set it up as is and keep return < 1000gph

 

[number1gsxxr]

Cool. I'm less concerned with flow and more concerned with flooding. My current tank, a46-bow w/ hang-on overflow box, has overflowed twice and I've been told if it happens again the tank will have to go.

How do you like the full-length overflow? I was thinking of building an overflow box like the one in the DIY section that someone made recently.

 

[snowmaker]

Cool. I'm less concerned with flow and more concerned with flooding. My current tank, a46-bow w/ hang-on overflow box, has overflowed twice and I've been told if it happens again the tank will have to go.

How do you like the full-length overflow? I was thinking of building an overflow box like the one in the DIY section that someone made recently.

Coast to coast overflow works slick. I made a screen out of "Gutter Guard" for it.
Is an easier build than the boxes, and strenghtens the back glass - which caqn be tied to the front like my SWAM build link, but I like boxes too. Just bought and installed 2 on a 120g. The back panel on those in that thread aren't needed. The box just gets siliconed to the back glass.

 

[metalfab]

what brand overflow box has overflowed? just curious

 

[number1gsxxr]

I'm not sure of the name but it's the overflow that was included with my sump. The sump says Pro Clear Aquatic Systems, Jacksonville, FL on it.