Flexable versus Ridged holding tanks - SailNet Community

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Old 02-28-2007
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Flexable versus Ridged holding tanks

When I bought Privateer she originally had a flexible holding tank
(Jabsco Par 15) which still had crap (pun intended) in it after the previous owner had her up on the hard for almost 2 years. Needless to say I deep 6'd it. The new marina requires holding tank for liveaboards, and I was thinking about replacing the old with a new flexible, but I have no experience with them. Input would be appreciated.
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Old 02-28-2007
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I would avoid ridged holding tanks, as they are much more difficult to clean out than smooth tanks are. If you're asking about flexible vs. rigid tanks, I would probably say that rigid tanks are the better choice for most boats.
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Old 03-05-2007
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Take a look at:

http://www.severnriveryachtclub.org/...sanitation.htm

You want a holding tank that lets the poop degrade _aerobically_. So there has to be air on top of the waste.

Use a rigid tank. Usually, _somebody_ makes something that fits in the available space.

Charles
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Old 03-05-2007
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Sorry - that document is at:

http://www.severnriveryachtclub.org/...sanitation.htm

Marine Sanitation: Fact vs. Folklore
by Peggie Hall (used to be the head of Peal Products, bought by Raritan in 1999)
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Old 03-05-2007
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Great link CP!
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I would point out that Peggy Hall is probably one of the foremost experts on marine sanitation systems there is currently.

I would also point you to this link, which I believe is also by Peggy, and does mention the negative aspects to using a flexible bladder as a holding tank, especially on a sailboat.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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Last edited by sailingdog; 03-05-2007 at 12:13 PM.
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