Frank Posted April 3, 2021 Share Posted April 3, 2021 (edited) I see people talk about clogged overflows, or losing the siphon on external overflow boxes. They explain that the return from the pump would then cause the main tank to overflow. I don't understand this. Is there some advantage to positioning the pump inlet so this could happen? Edited April 3, 2021 by Frank Link to comment Share on other sites More sharing options...
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