The other day I desided to empty our fresh water tank. I turned on the water in the galley and it started draining down the sink. okay so far. After a while I began to wonder where the water was empting out. I looked every where and I could not see any water coming out any of the abovr water drain holes. Does the sink lines from the galley and head empty out under the water line? I must have drained out 20 plus gallons but could not even see a ripple of water. Help this puzzled Irish Rogue.