Allthough my drain line does not travel 16' it does travel up ~12" after dropping from the overflow. If you get a strong enough water return it should help to push and then syphon the water into the sump. Not a pump expert at all but 16' is a lot of head loss.
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- Greg
90G : Light - Tek 6xT5 | Skim - EuroReef RS135 | Flow - 2xVortech MP40W | Control - Reef Keeper 2
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