Question regarding head, holding tank, y and t valves?

[rangerover]

Andy- My setup is as drawn, except for tee#1 to the deck fitting. I do not have a deck fitting. I will be adding one.
Mick- Nice pics and diagram.

[andyv94]

Interesting mine also has no deck fitting, I'm going here in May to the boat.....I'll take pictures and I'll post them here

[lonesome_boatman]

Andy
The deck fitting is on the port side deck through the teak decking above the anchor locker. I do not have a photo of the location, but will take one when I am down the boat next week.

[andyv94]

Thank you Mick but I don't have one at all!! I have one on starboard by the diesel intake but that is connected to a tank that's the previous owner added below the aft berth. It is empty and has no other connections at all. : (

[mimoza]

I was considering glassing over the forward seacock. I haven't opened it in years, except to make sure it still works. The only thing that keeps me from doing so is the "what if" factor. OK, that and it would be some work. But, what if the holding tank pump fails? I haven't had a need to use that either since discharge is prohibited in the Salish Sea.

If I were to eliminate the direct line overboard, I would still some kind of valve on the outflow from the head in order to make the deck pumpout work.

Pondering Blue Water...