Do you have an "A" or "C" plan? I have a "C" with the icebox just inside the companionway where the nav station is on an "A".
Being that the icebox is next to the engine compartment on a "C" plan, the drain
line is plumbed inside the engine compartment. I flip up the top step where the drain plumbing terminates. I have a jabsco hand
pump that connects to the ice box drain
line, and just hand
pump it into the cockpit.
This is the jabsco
pump i use:
I also have two foot
pumps, one fresh and one sea water. If i wanted to, i would plumb a "T" and a ball valve into the suction side of the sea water
pump. Then to drain the box, just shut the sea water seacock, open the drain valve and
pump. I would not plumb to my fresh water
pump though because that might contaminate the fresh water supply with rotten nasties from the icebox.
I'll take some pics and post them soon.