I am substantially reworking my 1970 31' Sovereign
. It had been pretty well stripped before I got it, including much of the supply plumbing. I will be replacing all with new Pex and Shark Bites, but when I got to my freshwater tank, this is what I found (see attachment). I have two questions: first, did this model come with a water pump or does it work solely off of pressure? Second, does anyone know what the lines are for? I am only certain of the drain at this point, which of course goes to the black water tank in back. Thanks for any info.