Association Forum - Holding tank location??????

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Catalina/Capri 25/250 Sailor's Forums

Catalina 25 Specific Forum

Holding tank location??????

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SJ
Navigator

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USA
198 Posts

Initially Posted - 02/24/2006 : 11:19:33

I've threatened to install a real head on the boat for years now. I finally brought the boat home and have the ability to really get some work done on her this winter/spring. I've narrowed it down to two locations for the holding tank, and wanted if anyone has installed a new holding tank forward under the veeberth, or is it best to keep it under the port settee. Catalina direct seems to have the tank for the settee but nothing for the forward location. I found a site that has all sorts of sizes and shapes, and it looks like they have a vee type that would fit. I'd welcome all thoughts on this.

Thanks!!!

Scott

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 02/24/2006 : 11:45:44

Leon has it up front, that's where I would put if I were doing it.

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aeckhart
Master Marine Consultant

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USA
1709 Posts

Response Posted - 02/24/2006 : 11:59:54

Scott,

How old is your boat? All late model C25s have the tanks under the v-berth. The older boats have them under the port setee. I would think that balance - the boat sitting on her lines properly, would dictate where it should go though, which would make the centerline/v-berth option most likely.

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sfein
1st Mate

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36 Posts

Response Posted - 02/24/2006 : 21:18:38

I am looking to do this as well. I currently have a worn out tank in the V-Berth. What was the name of the site for the V shaped tank?

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Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 02/25/2006 : 00:32:08

After five years or so, I'm still very satisfied with my 16gal. V-berth holding tank installation. No significant loss of usable storage space, reasonably easy to route hoses and work on, helps balance the boat on its lines, no odors ever.

-- Leon Sisson

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sfein
1st Mate

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36 Posts

Response Posted - 02/25/2006 : 22:58:34

Leon,

Do you have pictures of that installation?

Stuart

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Downbucket
Navigator

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USA
188 Posts

Response Posted - 02/26/2006 : 07:49:40

Hi Stuart:

Do you have any pictures of the tank in the v-berth? I am going to install a new tank in the v-berth of my 1980 Catalina this spring. You may have read a previous post of mine about the "rubber bladder" holding tank I pulled out about 3 weeks ago from under the port settee.

I went to the New England Boat Show in Boston yesterday (nothwithstanding the snow storm) and picked up a vendor's catalog which featured a gazillion holding tanks of all sizes and dimensions. They also make custom tanks. Don't know anything about the company or anyone who has purchased anything from them. They do seem knowledgeable and helpful. I'm at work right now so don't have the name or website. If you're interested, I can post it here this week.

Thanks.

Will

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Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 02/26/2006 : 20:36:38

<center>Holding Tank Under V-Berth</center>

I installed a 16gal rigid holding tank all the way forward under the V-berth. The space it occupies wasn't previously very useful for storage. The tank I installed is a Raritan model 16B373. Bladder type waste tanks are more prone to odors than rigid ones. The problem with flex bladders is that they don't allow the arobic bacteria to get enough oxygen. And in rigid tanks, thicker walls are better to reduce odor permeation.
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[url="http://home.mpinet.net/~sissonl/boating/photos/C25_holding_tank114Jm.JPG"]

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I recommend you get one with at least 3/8" thick polypropolene(sp?) walls, and two large vents for cross flow. I have dual 1" vent lines to provide lots of air for the good bacteria, and to carry off odors.
<center>
[url="http://home.mpinet.net/~sissonl/boating/photos/C25_holding_tank113Jm.JPG"]

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The vents exit just below the whale-eye nav. lights.
<center>
[url="http://home.mpinet.net/~sissonl/boating/photos/C25_holding_tank118Jm.JPG"]

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The pumpout leg of the outlet hose goes to a deck plate at the fwd port corner of the head compartment. The offshore discharge route is from the 1-1/2" T-fitting, through a waste-rated (Henderson?) diaphram pump, and out through a bronze and SS seacock and bronze thru-hull. There is no Y-valve.
<center>
[url="http://home.mpinet.net/~sissonl/boating/photos/C25_holding_tank116Jm.JPG"]

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Regarding head hose replacement -- not all hoses are created equal. I would suggest that odor permeation is the most important criteria in selecting a new hose. Sealand OdorSafe is the way to go. Don't let the price deter you. Head work is not a good place to be overly frugal. Sealand OdorSafe hose is also miserable to work with because it's so stiff. Remember to double hose clamp any hose that could spill sewage.
My installation draws its flush water from a T-fitting located below the waterline in the head sink drain hose. Be sure to study up on vented loops, proper seacocks, holding tank venting, marine waste hoses, etc. I highly recommend reading Peggie Hall's book on boat odors to familiarize yourself with the issues to be addressed, potential pitfalls, and the trade-offs involved.
<center>

</center>
As mentioned above, my system has been in use for several years without odors or other problems.

-- Leon Sisson

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Downbucket
Navigator

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USA
188 Posts

Response Posted - 02/27/2006 : 07:55:00

Leon:

Thank you for the pictures and information. I just purchased a digital camera last week and will take pictures when I install my tank and post them here. Again, thanks.

Will

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Ella
Deckhand

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USA
10 Posts

Response Posted - 03/07/2006 : 20:46:06

Leon
How do you prevent water from coming in through the whale eyes where you have your vent for the holding tank? Thank you for the pictures. Those are very helpful.

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Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 03/07/2006 : 21:02:03

Ella,<blockquote id="quote">quote:<hr height="1" noshade id="quote">How do you prevent water from coming in through the whale eyes where you have your vent for the holding tank?<hr height="1" noshade id="quote"></blockquote id="quote">If you mean water getting into the holding tank vents themselves, I don't worry about it. Here in 'sunny' Florida, we receive a great sufficiency of rain, sometimes quite heavy. I've never noticed a significant increase in holding tank contents from water getting in. I suppose if one were sailing in waves large enough to submerge the bow, water would tend to go down the vents. Having sailed in such conditions briefly, I can asure you that if you're submerging the bow consistantly for a long time, you've got bigger problems on your hands than a slowly filling holding tank.

If you're refering to the whale eye lights themselves leaking, or water from the anchor locker leaking on them from inside, I made a few changes to put a stop to that. I rebuild the lights using new bulbs, lenses, and gaskets. I sealed the anchor locker to the hull, and installed a much larger (1/2" I.D.) drain tube. To retain access to the light bulbs, I installed a pair of imitation Beckson plates inside the anchor locker.

-- Leon Sisson

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 03/07/2006 : 21:05:23

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Ella
 Leon
How do you prevent water from coming in through the whale eyes where you have your vent for the holding tank? Thank you for the pictures. Those are very helpful.

<hr height="1" noshade id="quote"></blockquote id="quote">

Ella,

The whale eye bow lights open to the anchor locker whereas Leon's tank vents are mounted beneath the anchor locker. If water were to get past the bow lights, it would simply drain out the anchor locker drain.

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Ella
Deckhand

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USA
10 Posts

Response Posted - 03/08/2006 : 18:41:51

Thanks for the tips. As always, very helpful.
Ella

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The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.