M_Boats: M-17 scupper???

Not too long ago someone posted that they use a bath tub stopper in the scupper to keep water from coming in. I have looked at the archives, but can't find it. Does anyone recall the size of the stopper that was used? I've also seen the short automotive hose solution. Again, what size hose? My M-17 is a 1980 and the scupper is at the aft of the cockpit sole and there is an offset to the drain in the hull just forward of the transom. Dan M-17 #316B