This is what I have done. I was able to insert a new hose into the drain from the shower pan into the bilge. Good news. I then ran that tube to an external 3 gph pump. On the outlet side of the pump I placed an adjustable restrictor valve and then plumbed all that to drain into the sink in the galley. Wired it up and it works great accept for one little problem. If i restrict the water leaving the pump down to the point of not filling up my sinks water backs up in the shower pan. If i open the valve so the pan drains the water backs up into the sinks. They don't fill up but water rises up into the sinks about an inch or so. I have not replaced the drain hose from the sink and will do so on my next visit. I had thought about using rubber stoppers in the sinks when using the shower but am concerned about pressure from the pump damaging or blowing the hose fitting off the thru hull which would not be good. Another idea I had was to tee into the manual bilge pump hose on the outlet side of the pump with my shower hose and that would just drain out the back of the boat like the bilge. I'm getting close but any knowledge or ideas would be of great help. Thanks
