OK dumb question warning here. Just bought some used v-drive sacs and a tsunami pump(T-1200). Stick with me here......To fill, the bottom of the pump attaches directly to the bag and the hose end goes over the side of the boat into the water. Good so far? Big question is how do you drain these things????? Do you just let it drain into the bilge? I can't see how that would be good. Will the pump draw out the water if I connect the hose end to the bag? I have a big
over my head. Someone enlighten me.......

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