And it's an important part of my ice box. The separate drain sump gets hand pumped up into a T in the galley sink drain line. For it to work best, I need to close the sink strainer so it pumps straight through. The best basket is a screw down type. Not only does that help the pumping, the process will also blow out the sink line if it gets clogged(happens quite a bit). I haven't had any corrosion problem but I don't have a salt water tap on this boat.