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

Mike Lehman sail_505 at hotmail.com
Thu May 30 05:56:14 PDT 2002


I installed with two 5/8" vents and there is no odor at all. Bigger is 
better, but these seem to work fine. USE GOOD HOSE!

Venting is why these tanks don't smell and flexible tanks reek.


----Original Message Follows----
From: George Dinwiddie <gdinwiddie at min.net>
Reply-To: public-list at alberg30.org
To: public-list at alberg30.org
Subject: Re: [Alberg30] It's That Holding Tank Thing Again (and Group Buy?)
Date: Wed, 29 May 2002 18:20:35 -0400 (EDT)

I added #4 because the air vents weren't mentioned at all.  On the
tanks in the previous group purchase, having the air vent fittings
on the top of the tank proved to be a problem for the older boats,
because the V-berth sits a little lower than in the new boats.
There was approx 1/4" inteference with the V-berth plywood.

The use of two vents instead of one is a suggestion of Peggie
Hall.  See http://www.boatsafe.com/nauticalknowhow/phall.htm#oder
or http://www.raritaneng.com/Products/Holding_Tanks/Catht1.pdf
pages 3-4.  You'll also note that Peggie recommends a 3/4"
(or even 1") vent line.  If you use the standard 5/8" vent
line, but use two of them, you not only get better crossflow,
but the combined effective diameter is 7/8".

Yes, up higher is better, as long as the tank fits.  Near the
fore-aft center-line of the tank is also better, as it keeps
the vents higher as the boat heels.

  - George

 > EddieDiver at aol.com said:
 >
 > George; in the added paragraph #4 wherein you mention the problem with 
the
 > air vents and hoses on the top of the tank, what was the problem? On 
#303,
 > Emotional Rescue, we have a slight odor but nothing else. The idea of 
adding
 > a port and starboard vent hose is interesting. But it would seem better 
to
 > get the vents up higher in the tank rather than on the forward "side". 
Ed.
 > Schroeder

--
  ----------------------------------------------------------------------
   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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