thats how the livewell in my 20 is. it works, but you have to watch out while your running. it will overflow pretty quick. for the inlet side directly under the livewell there is a thru-hull with a valve and a pump mounted on top. all of that is inside the livewell. to fill it, you open the valve and turn the pumps on. it fills pretty fast at rest. when your moving watch out that water comes in quick. the pujmp inside is a 500 gph. for the outlet part i have an 800gph pump that the water flows into
livewell outlet pump i was hoping that with that bigger pump it would not overflow anymore but it still does, just not as fast. i can close the valve inside halfway and it fixes the problem but then i dont have as much movement in the water and my bait starts to suffer.