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· 1975 Newport 28
1986 Hunter 31
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Discussion Starter · #1 ·
Here's a drawing of my plumbing setup in my 1975 Capital Yachts Newport 28. I haven't ever found an actual manual drawing that matches this setup, so I'm thinking a PO must have done some mods to it. I've left out some details to make my (poor) draftsmanship more legible.

The only actual drawing from a Newport owner's manual that comes close has the waste and freshwater inputs reversed from what my boat has. That makes eminently more sense, as you don't pump out waste through your v-berth as my setup currently requires.

The fresh water input connection on my boat is completely unseeable by human eyes. I was able to get my hand on it, but that's all. I don't know how I'd ever replace the fittings if they needed replacing -- maybe by touch.

However, the input line is accessable via an inspection hatch at the forward part of the v-berth. I'm thinking I could cut the line there, reroute the freshwater input over to where the pump-out fitting is (replacing all fittings, natch) and run the current freshwater line over to the holding bladder and make that the pump-out line.

Hopefully the attached drawings will make this clear. Does it seem like a plausible refit?
 

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· 1975 Newport 28
1986 Hunter 31
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619 Posts
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Discussion Starter · #3 ·
I suppose one could make the argument that you wouldn't be pumping in water for the head at the same time as you were pumping the holding out the through hull. Makes sense, I guess.

Your other suggestion is what I was trying to explain in my original post: take the fill line for the fresh tank and move it to the holding tank, and move the input for the fresh water to the fitting under the v-berth cusions.

New fittings all around and new lines should make this possible, I'd think.

How does a pump out work, anyway? I've never even seen it done. Does a line have to snake all the way into the holding tank to pump it out, or does a fitting just snug up to the deck fitting and pump it right out through the lines in the boat?
 

· 1975 Newport 28
1986 Hunter 31
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Discussion Starter · #5 ·
It's mainly the difficulty of getting to things. The fresh water fill is inside the anchor well in the bow. I have no access to the underside of the well, so I'd have no way of putting a fitting there. It'd be much easier to modify what's already there, and I don't mind the idea of running a water hose down through the forward hatch to fill that tank.
 

· 1975 Newport 28
1986 Hunter 31
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Discussion Starter · #8 ·
How easily does the pumpout line route though a y-valve?

Right now the line out from the holding bladder goes to a y-valve which can be switched from pumpout to throughhull. When the y-valve is set to pumpout, can the pumpout line easily get through without hanging up? Is that the normal configuration?
 

· 1975 Newport 28
1986 Hunter 31
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Discussion Starter · #11 ·
This might be a possibility: leave the freshwater fill as is. In the anchor well I could cut another hole next to the freshwater fill and drop a weighted line down where I can pick it up inside the v-berth access panel. The I could use a fish tape to reach over from there to where the holding bladder is.

Once I've done that I could attach a line to a piece of sanitary hose, pull it over to the access plate, attach it to a fitting, pull the fitting up through the hole with the line and then fasten the fitting in place from above.

Voila! A new deck fitting for the pumpout. If there's room I could even double up and pass a vent line up that way along with it.

Have to stick my head back down there this week and have a look-see about this.
 

· 1975 Newport 28
1986 Hunter 31
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Discussion Starter · #14 ·
I see your point, but the original drawings for the boat have both input and output in the anchor well. And it would be a simple matter to always cover up the freshwater fill with a plastic bag before starting the process, and wipe the area down afterward as well.

I appreciate all the feedback I've gotten on this thread. What I really need to do before anything else is get the existing bladder pumped out as soon as the weather permits. I really didn't start thinking about this until late last season when I pumped some water into the head and flushed it out to make sure everything still worked OK. After that it started cooking a bit, and that's when I noticed that some work needed to be done.
 

· 1975 Newport 28
1986 Hunter 31
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Discussion Starter · #17 ·
Jas-

Since you already have the other deck fitting location, why drill another hole, if it isn't necessary or safe. :)
There is no other deck fitting location. There is a pumpout fitting now in the v-berth under the cushions and the freshwater fill in the anchor well. I figure I can either swap the usage of the fittings or drill a new hole so they can both be up in the anchor well.
 

· 1975 Newport 28
1986 Hunter 31
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Discussion Starter · #18 ·
I've heard a few Y-valve comments posted, but I don't see a Y-valve in your diagram; although, I do see the effluent hose from the holding tank diverting to either the pump out or what I assume is a macerator pump at a through-hull discharge. A Y-valve could be placed at this effluent split, but it would have no function. During a pump-out the through-hull is closed and all suction would be applied to the tank. During the use of the macerator the deck plate is closed and all suction is still applied to the tank. I've been running with this pattern for years with a T-fitting without any concerns. Running the pump out to the deck is advisable, but unless the space is critical, there is no need to give up the water fill. What about a pump out down the port deck closer to the tank? Any chance during the refit to exchange the bladder for a firm tank would be advisable. 'take care and joy, Aythya crew
There is a y-valve in my original drawing, right where the line comes out of the holding bladder. One line from the y goes to the pumpout fitting under the v-berth cushions and the other line goes to the throughhull.
 
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