Ok, here's mine, it's saved me twice now, I have two pumps out of my sump, one for the main DT and the other for the DSB, Refugium and Frag tank. So what happens when your main pump's impeller goes out? Well here's my solution. First pic is the solution the second shows where the second main display pump would have been, just re-routed a little pvc pipe to make a new connection.