6 Series Gen 4 Upgrade - BlueDid you know that all Aqualuma Thru-Hull fittings can be upgraded to the latest generation, with one simple process shown below? This upgrade can be done while the boat is in the water.Upgrading is SimpleTwist end cap clockwise and remove old internals.Slide new Generation internals into housing.Twist cap counter clockwise, connect wire and you are done.Upgrade PathGen 3 - 3 Series may be upgraded to a Gen 4 - 6 SeriesGen 3 - 6 Series may be upgraded to a Gen 4 - 12, 18 or 18 Tri SeriesGen 4 - 12 Series may be upgraded to any of the Gen 4 - 18 Series or 18 Tri Series