Dan : Look at page 4.3.3 (plumbing) and page 4.3.1. (thru hulls) of your owners manual - or the MK 1 manual on our site - Straight forward.
There are a number of owner mods to the galley sink drain and mods to the shower drain as posts on this site.
A few thoughts
There are a number of owner mods to the galley sink drain and mods to the shower drain as posts on this site.
A few thoughts