[Public-List] holding tank vent

[Mike Lehman]

This reminds me of a funny story. A couple in Florida bought a brand new 
boat. After several months they went back to the broker and complained that 
of a foul smell in the boat. The broker visited the boat and asked then how 
often they pumped out the holding tank. They replied that they have never 
had to empty and were very pleased with the extra large capacity of the tank 
because it never seemed to fill up. As it turned out the vent line for the 
holding tank was led up into the mast all the way to the spreaders. When 
they removed the mast to investigate the foul smell the mast was full of 
shit that was overflowing the vent line.



~~~_/)_/)~~ Mike Lehman ~~_/)~~~


-----Original Message----- 
From: John Boor
Sent: Thursday, March 07, 2013 8:23 AM
To: j_l_brown ; Alberg 30 Public List -- open to all
Subject: Re: [Public-List] holding tank vent

On MAHSEER #380 the tank vented into the base of the mast this kept out
all water intrusion and the odor exited at the mast top, and for you smart
a#$@$ people it also was a secondary holding tank.

John Boor

> I vented it through the cabin side in the head, used a fuel tank stainless
> vent fitting. Â I angled the vent slightly aft as well.
>
> If you were wanting to use a one way valve on the vent, you could add a
> suction one way valve to the tank, they mount flush. power boats with
> carbon filters on the tank vents use them. Â
>
> I'd think about using a tank additive then, there's a good one that helps
> prevent most anaerobic growth issues, mostly used in commercial waste
> water treatment. Â Cheap, ok for environment and easy to use.Â
>
> Otherwise even the nicest tanks and hoses eventually stink.
>
>
>
>
>
>
>
>
>
> Sent from Samsung Mobile
>
> -------- Original message --------
> From: Stephen Gwyn <stephen.gwyn at nrc-cnrc.gc.ca>
> Date:
> To: public-list at lists.alberg30.org
> Subject: Re: [Public-List] holding tank vent
>
>> I'd say the geometries are quite different if the vent is at the beam of
>> the boat instead of up on the bow.
>
> Yes.
>
> If a spot 6 inches below the rail at the beam is under water continuously
> ,
> that's normal, you're just heeled. If your bow is under water
> continuously,
> you've got real problems.
>
> I must confess I took 2 hours getting ready to drill the holes for
> the vents. Drilling holes in test pieces of wood, trying different
> bits, measuring, re-measuring, but mostly just procrastinating
> out of fear. Then I drilled the holes in about 15 seconds flat.
>
> SG
>
>
>
> --
> ------------------------------------------------------------------------
> Stephen Gwyn                       | Tel:
> 1-250-363-3136
> Canadian Astronomical Data Centre  | Fax: 1-250-363-0045
> Herzberg Institute of Astrophysics | Cell: 1-250-885-6969
> 5071 West Saanich Road             | E-mail:
> Stephen.Gwyn at nrc-cnrc.gc.ca
> Victoria, BC, V9E 2E7, Canada      |
> http://astrowww.phys.uvic.ca/~gwyn/
> ------------------------------------------------------------------------
>
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-List mailing list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-List mailing list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>


_______________________________________________
These businesses support your Association:
http://www.alberg30.org/store/A30supporters.html
Please support them.
_______________________________________________
Public-List mailing list
Public-List at lists.alberg30.org
http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org 


 1362664553.0