Overflows. Internal or External

[reefwars]

Originally Posted by Madreefer

I'm just listening to the tank builders. I'd prefer it to be not as wide for more tank space. I think it has to do with bulkheads. I'm also getting pieces of glass or acrylic attached to the back wall to act as a shelf to place a black acrylic cover over the overflow.

if we go with a 2" bulkhead for the emergency then the overflow box width will be 6" from the back of the tank , so if your tank is 30" the overall width is now 36" , as far as spacing goes from the wall as long as your tank is level then 1/2" -1" is more than enough, you need only enough space so that the box doesnt touch when the tank settles.

if we go with 1 1/2" drains then the box can be 5" and 4" for a 1" or 3/4" bulkhead.

we dont do smaller than 4" as it becomes impossible to work in.


hth

will have those diagrams shortly for you buddy

cheers

denny