When I bought my Nimble Artic 26 Bagatelle. I had difficulty figuring out the fresh water and Black water plumbing. I traced the lines. This is the schematic.
(https://www.cruisersforum.com/attachments/gallery/1/0/2/0/4/1/nimblearticplumbingschematic_thumb.jpg) (https://www.cruisersforum.com/gallery/showimage.php?i=15022&c=500)
Regards Thomas Bodine