So we did it...we bought a vetus bladder for our black water holding tank
. Before everyone blasts that part of the plan just trust me it was our only option and will be a huge improvement over the system I just took out.
Right now I'm starting to install the new system and I'm a bit confused about where the discharge (pumpout) hose should be located. I thought it was pretty obvious that it should go on the bottom and lowest part of the bladder, but every design I find online (not many) and the directions seem to indicate the discharge should be on the top of the tank.
The only thing I can figure is that its probably not a great idea to put a hole in the bottom of the bladder where black water
will put constant pressure on the seal around the fitting. I think the fitting should be able to handle that though. I would like to have it on the bottom so it pumps out completely each time.
Does anyone have any insight into where the best place for the discharge fitting is?