Replumbing a C25

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Apr 2, 2011
5
Catalina 25 Round Valley Reservoir
I just began redoing the plumbing hoses on my recently purchased 1986 C25; I just realized the PO left me with a full holding tank and hoses that were permeated enough to get into everything on the boat (curtains,carpet, etc.). It's like being in a heavy smokers house, except, I'll take the smoke smell any day over this. I went with Peggy's suggestion of the Trident 101. The boat already had a macerator pump which still works, but it was connected directly to the discharge on the holding tank. I didn't know that as I pumped and pumped in vain trying to emplty the thing. So now that all is removed, sanitized and clean, I'm looking for the correct setup. Hopefully I can explain my thoughts on the system without a diagram.

I plan to:
1. Run a 1 3/4" Trident 101 from the pump out to a y-valve1. Y-valve1 to the holding tank discharge port. Third y-valve1 port to the thru-hull discharge with the macerator pump between. I think i would have to use 1" Trident from the macerator pump to a y-valve2 at the thru-hull. The y-valve1 would be locked unless we were in a legal discharge zone.

2. Run a Trident 101 from toilet discharge to a y-valve3 to allow for holding tank or overboard discharge. Y-valve3 to the holding tank inlet. Third y-valve3 port to y-valve2 at the thru-hull discharge. It seems like a lot of y-valves but I'm not sure if I can just tee it where the macerator pump and the toilet discharge meet at the thru-hull.

3. Although I probably won't flush with sea water much if at all, I will tee the toilet intake hose and the bathroom sink drain together at the thru-hull just forward of the waste discharge thru-hull. This allows for either sea water or gray water flush. I haven' seen it mentioned before, but wouldn't it make sense to put a shutoff at the tee/sink drain junction so that the drain doesn't have to be plugged to flush with sea water. It doesn't seem like there would be enough vacuum to pull in sea water if the drain were open.

I haven't seen or heard the use of 3 y-valves from here or any of Don Casey's books; I don't think that I have seen someone with the ability to dump the holding tank and direct discharge as separate hoses. Most go to holding tank and then overboard.


I hope that is somewhat understandable without a diagram. If not, I'll fire up the scanner and put a diagram on a post.

One last question:
I bought the blue and red braided potable water lines. The 1" line for the water holding tank fill has a kink in one area that I cannot get out. When I received it via mail order, it looked like the end of a roll and was mostly oval and not round. If it gets a kink in it where the braiding reinforcement is cry he'd at some point, is that the end and that area will always kink or do I just need to reroute with a different radius.

Thanks for taking the time to read. I hope it make sense.

Tom
 
Dec 2, 1997
8,947
- - LIttle Rock
I hate to break it to you. but...

There's no point in installing the macerator 'cuz you're on an inland lake...pumpout is the only legal way to empty a tank in inland waters. You have to be in open ocean at least 3 miles from the nearest point on the whole US coastline to dump a tank legally.

That's the bad news. The good news is, that really simplifies your plumbing which was WAAAYY too complex anyway. I'm not surprised that you haven't seen or heard of a system with 3 y-valves...the West Marine advisor once described a similar setup with that many y-valves and loops as "Chernobyl!" Besides, there isn't room for that much plumbing on 25' boat.

Let's start at the beginning...and the first thing I need to know is the make/model/age of your toilet. Once I have that, I'll know what to recommend.

Btw...return the water hose...it's defective.
 
Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
In some cases you might want to put a hose clamp over a kink to bring the hose back to round.
 
Apr 2, 2011
5
Catalina 25 Round Valley Reservoir
Thanks for the quick reply. Although we are inland and sail on some local lakes, we do plan to trailer it for sailing trips to Cape Cod, Block Island and some other areas which might bring us into legal grounds. The boat is a 1986 C25 SR/FK with hull #5299.

I will definitely return the hose. THanks for that info.

Tom
 

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Nov 6, 2006
10,098
Hunter 34 Mandeville Louisiana
Fewer parts in the ...uuuhhhhh.. flow path .. the better.. Consider flushing straight to holding tank with the outlet of the tank "y" ed to the deck fitting and the macerator to a high siphon breaker loop, then to the (lockable) seacock and thru hull.. No Y valves necessary.. the seal of the deck fitting is sufficient.. My boat is plumbed that way.. when I bought her back in '91, I bought a Y valve to allow straight overboard flush but found the holding tank to be trouble free enough that I have never installled the valve. Since you are mostly on an inland lake, I wouldn't think you'd need anything more than raw water flush.. but teeing into the sink drain may be a good idea.
 
Dec 2, 1997
8,947
- - LIttle Rock
All the places you named are "no discharge" waters.

New England, where the waters are cold and the sewage treatment plants are so antiquated that they all have been granted waivers by the EPA, is a "hotbed" of strictly enforced "no discharge" laws. The entire state of RI, all of CT and most of MA and just about every harbor on Long Island Sound are all "no discharge" ...and I'm not sure you get it that you have to be in open ocean at least 3 miles from the nearest point on the whole US coastline or offshore island--NOT just 3 miles from the nearest shore in a bay or sound--to dump a tank. That would be about half a day's sail from most of the places you named...at least two days from several. Couple that with your being on an inland lake and it means you won't get enough use out of a macerator to justify installing it.

You gave me the make/model/age of the boat...I need the make/model/age of the TOILET. If you don't know, email me a couple of photos that show a good view of the pump (all bowls look alike, so a photo of the bowl won't help). I received your first email, I'll reply so you'll have my email address. Also would be helpful to know what else you already have that either came with the boat or you've bought...and how much is returnable besides the defective water hose.
 
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