When your vessel is too large to get into the marina, make your own.
My Technicold chilled water air handlers have an option for a heat strip to be added to any air handler. The control will call for that heat...
Yes, never chemicals. Compressed air is much more useful and safe.
Previous owner of mine had the yard fare and repaint the boot to dress her up to show. They fared over the heat exchanger discharge for the raw...
Weird...gray water sharing black water would mean that every drain must have a wet trap. Sitting could cause a clog. Air. Snake. Both good...