10-09-2006, 12:44 PM
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I am using CPR S90 overflow box, it is getting the water out of the tank to the sump, in the sump, I use a pump to push the water back to the tank. When the water flow from the tank is faster from the sump to the tank, the tank water will go down. On the other hand, if the water flow from the tank is flowing less than the water from the sump, the tank will overflow with water.
The most difficulty in this one is the flow rate in both in and out direction have to be the same. I keep the flow rate from the overflow box the same, I just control the flow back from the pụmp. It gets to the point that there is a little bit difference in them. Over 8 hours, the difference willbe big then, sooner or later, water will overflow on either the tank of the sump.
It is always good to have a built-in overflow than the hang-over overflow box.
Again, thanks for your input.