If you have tried to make dripping water but failed because of the extremely complicated steps (I know I did) then it's your lucky day! I have come up with an EXTREMELY SIMPLE AND EASY way to make dripping water. (to make the water drip, use trigger_auto)
1: make a little tiny texture block and assing it to a func_train.
2: make your path_corners as you would for a normal elevator and check the teleport flag on the top path_corner.
3: Check the not solid flag on both of path_corner entities.
That's all there is! I think this is much more simple than messing around with multi_managers.