[Public-List] holding tank vent

[j_l_brown]

I vented it through the cabin side in the head, used a fuel tank stainless vent fitting.  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.  

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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-------- 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



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Stephen Gwyn                       | Tel: 1-250-363-3136
Canadian Astronomical Data Centre  | Fax: 1-250-363-0045
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