if your sump is in the basement you can easily topoff into that. if you need to topoff to the main floor the typical topoff pumps may not have enough power to get it there. you can choose an ato that includes a pump powerful enough or in the case of something like the tunze osmolator you can buy an add-on that allows you to connect a pump other than the one they sell with the unit.
which ato do you have or plan to get?
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