Dip Tube - Gas In - Stainless Steel

Can it be used on the out side/Liquid side for a floating dip tube?

Perhaps with the right mechanism, and a way to secure the draft line to the dip tube like a stepless clamp, you could definitely rig something up.  The trick would be finding the right floating dip tube mechanism to make it work properly.  Otherwise, this will work exactly like a standard, beverage out dip tube, but much shorter.

How long are your dip tubes?

These dip tubes are 1.5" long and 1/4" diameter.