Holding tank plumbing design

[AllanS]

Hi, on my 1989 440 Aft Cabin I have a 35 gallon holding tank. It has three hoses attached, one at the end/top (the waste inlet) and two attached to a common port on the end/bottom (the pumpout line and the macerator line). There is also, of course, a vent port on the top of the tank.

I am relocating my holding tank or buying a new one. As I design my hose locations relative to the new/relocated) tank, I have a questions. Do the pumpout hose and the macerator hose need to be connected together at the tank? Could I achieve the same functionality if the macerator hose (which I rarely use) is T-ed into the pumpout line about halfway between the tank and the deck pumpout location?

 

[ranger58sb]

The pump-out hose and the macerator hose do not need to be connected together at the tank. (Not sure effect of connecting macerator to pump-out halfway between tank and deck fitting.) I used two separate hoses, and since I rarely used the macerator (never, actually, except to test once with clean water), the macerator hose and macerator itself were both always clean.

You can gain tank capacity if you use all top fittings, with dip tubes for the pump-out and macerator outlets.

Ronco will add fittings wherever you want them, and if external space is a constraint they can put the fittings inside the tank instead of outside.

-Chris

 

[AllanS]

Thanks, Chris. Reason for the T idea is that I’m relocating the tank to the port side, and the pumpout and macerator hoses reside on the starboard side, so I am trying to avoid extending both hoses the extra distance.

Great tips regarding Rocco, and using top-mounting fittings! Thanks!