[Public-List] holding tank vent

[John Boor]

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.  Cheap, ok for environment and easy to use. 
>
> Otherwise even the nicest tanks and hoses eventually stink.
>
>
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>
> 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/
> ------------------------------------------------------------------------
>
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