[Alberg30] It's That Holding Tank Thing Again (and Group Buy?)

[George Dinwiddie]

Currently I have the Mansfield Type-I system with a single vent.  The 
vent fitting is the same as one for a fuel tank and is fairly high on 
the starboard bow.  The hose goes forward from the tank and then across 
the chain locker.

My plan is to add a second, similar vent on the port side.  In spite of 
the fact that it won't be as open as Peggie recommends, I think it'll 
work OK.  There will rarely be exactly the same air pressure on both 
sides of the hull (unless the boat sits perfectly still at anchor, or 
there is no wind at all), so there should be air forced through the system.

 - George

EddieDiver at aol.com wrote:

>I read the very informative email from Mrs. Peggy Hall, the marine head 
>consultant. I also have read the answers from the club guru's. I don't 
>understand what type of thru-hull "vent" is on the outside of the hull, at 
>the bow, that will allow the entry of sufficient air to effect oxygenation of 
>the tank but not allow water entry from waves from entering the tank. If the 
>vent hoses are exiting the holding tank at the top of the tank, are not 
>exposed in the vee-berth, they are pretty low and subject to a bow wave. Can 
>you explain what type of vent opening and it's height above the waterline, or 
>above the top of the tank? Ed. Schroeder #303 Emotional Rescue
>

-- 
 ----------------------------------------------------------------------
  George Dinwiddie                             gdinwiddie at alberg30.org
  The gods do not deduct from man's allotted span those hours spent in
  sailing.                                    http://www.Alberg30.org/
 ----------------------------------------------------------------------



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