[C320-list] Holding Tank Flooding

[Gary Magnuson]

Hello Karre, and Mary,

Glad to her that you have decided to close the macerator through hull. 
Since you boat on the great lakes, the Macerator and through hull is 
illegal to use.  You should have a placard  on board stating it is 
illegal to dump sewage anywhere in the great lakes. When I do Vessel 
Safety checks, that is one of the items on the check list. That thru 
hull should be closed and locked or have the handle removed such that it 
cannot be opened.  The DNR or the Coasties will be very very angry with 
you if they find it open or operable.   Just a "Heads Up".

Gary Magnuson
Time A Weigh 205, Bayfield, WI

On 7/19/2016 9:29 PM, sailor3952 at charter.net wrote:
>
> 	Thanks Jeff and others for your informative wisdom. I will simply
> keep the thruhull for the macerator CLOSED. End of problem. Your
> comments and advise have been most helpful. This group is awesome!
> Wish all of you were in the same marina! Thanks
>
> 	Kaare & Mary
>
> 	-----------------------------------------From: "Jeff Hare"
> To:
> Cc:
> Sent: Tue, 19 Jul 2016 21:11:04 -0400
> Subject: Re: [C320-list] Holding Tank Flooding
>
>   Nope I don't believe so. That anti-siphon is only for the head hoses
> that
>   come from the thru-hull under the sink. There's no anti-siphon
> between the
>   macerator pump and the holding tank. There's no check valve either,
> it's
>   only the macerator pump impeller that slows the water into the
> holding tank
>   unless the macerator pump happens to be above the water line, don't
> know for
>   sure.
>
>   -Jeff
>
>   -----Original Message-----
>   From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
> Behalf
>   Of jbrown5093 at yahoo.com
>   Sent: Tuesday, July 19, 2016 8:45 PM
>   To: C320-List at Catalina320.com
>   Subject: Re: [C320-list] Holding Tank Flooding
>
>   Wouldn't the anti siphon loop in the head cabinet prevent siphoning
> in
>   either directions?
>
>   Jim Brown
>
>   Sent from my iPad
>
>   > On Jul 19, 2016, at 6:26 PM, Jeff Hare  wrote:
>   >
>   > I would not be surprised if you could sink your boat this way
> depending on
>   how the hose leading from the head to the tank is routed and how good
> your
>   head's duckbill is. If you pump out with the macerator thru-hull open
> and
>   the head vent is at all clogged, the vacuum will pull seawater in
> through
>   the macerator pump and water out of the head and could set up a
> siphon and
>   will likely slowly fill your tank to the water line. I presume but
> don't
>   know whether the rim of the head is above the water line. If not, the
> boat
>   can be sunk this way.
>   >
>   > Bottom line is that the macerator line does not have a vacuum
> breaker in
>   it, so it can never be left open. When your tank is being pumped out
>   through the deck fitting, I believe you always want that valve closed
>   anyway.
>   >
>   > -Jeff
>   >
>   > -----Original Message-----
>   > From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
> Behalf
>   Of Kaare Wold
>   > Sent: Tuesday, July 19, 2016 4:25 PM
>   > To: C320-List at Catalina320.com
>   > Subject: [C320-list] Holding Tank Flooding
>   >
>   > Skippers, Recently we noticed that our holding tank fills with
> water when
>   at rest at the dock. At first, thought our dock attendants failed to
> pump
>   out. We have an AccuGage digital monitor on all tanks. Love that
> setup!
>   > We had the tank pumped, while we were present, and as the tank was
> being
>   pumped out, I could see the AccuGage digital level drop from 3/4 to
> 1/2 down
>   to empty. A couple days later, it was back to 3/4 full without any
> personal
>   use whatsoever. The macerator thruhull had been open all the time,
> although
>   we never use that device. All thruhull are opened for winter layup
> and I
>   never closed it after spring launch. I now closed the thruhull, had
> the
>   tank pumped out again and.....bingo..., the tank remained empty. Any
> ideas
>
>   > from our knowledgeable group??? Could there be a check valve in the
>
>   > macerator pump that is leaking? Looking for some suggestions or
>   comments
>   > from someone that may have experienced the same problem. Thanks to
> all
>   for your comments.
>   > Kaare & Mary Wold
>   > Sheet Music, #945 Sturgeon Bay, WI
>   >
>
>
>