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#6
07-14-2012, 07:52 AM
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Not sure I follow. Are you wanting to mod an existing tank? If so, notching a built tank for c2c overflow is risky business.
But, to answer your questions... width of over flow? I can help you calculate this but I recommend 12" to be able to handle over 800gph (over engineer) 2 pipes? Go three and do a beananimal overflow. Use gate valves for tuning the pipes. What diameter pipes, 3/4"? No, go with 1" if you can Water height in tank, 1.5" down (rimless tank)? That is your preference. I have my water height 0.65" from the edge (rimless). But that is a 1.25" x 12" notch flowing 600+ gph. You need to account for the laye thickness of water flowing over the weir (again, I can help calculate this). Glass thickness, 3/8"? Yup, that's plenty thick. 
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