- Location
- Far Rockaway
I run 3600 gph in 2 boxes and my over flows are quieter then church mice.
Like you said you have 2 he has 1. On the bigger tanks with 2 overflow thay can handle more gph and that head pressure. Your probley running 1/2 that. If your sump in the basement and the tanks upstires then your only running 1500gph out of that 3600 your talking about.
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