Quote:
Originally posted by jnarowe
swannking: Not sure about that. While my overflow box is about 94" long, it is only 6" x 6" and there is only about 3 inches of water in it, so it really depends on more variables.
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It is the length of the overflow box that determines the volume of flow that it can handle ie. from the tank to the overflow. How fast the water inside the overflow box drain into the sump is determined by the size of the drain. Since yours is 94", there is no issues. If your length of the overflow is much less, let say 12", then the water in the tank can't get to the overflow box fast enough and the main tank water level will rise until it overflows.