[Public-List] Conversion of water tank to holding tank

[Mike Lehman]

Avoid bladder tanks - the main problem is, since they collapse, you cannot 
vent them properly. Without proper venting the tank will become a anaerobic 
and bacteria will growth quickly. When the anaerobic bacteria develops the 
odor will become very strong in a short amount of time. With rigid 
polyethylene you should install 2 vents to allow for an air exchange which 
creates an aerobic environment that does not have odor.

When converting the water tank to a waste holding never, I repeat N-E-V-E-R, 
use the aluminum cover that was part of the original tank or any aluminum 
fittings. Sewage quickly corrodes aluminum and you will have a major 
mess...I just replaced a Whitby installed holding tank from under the cabin 
sole...not fun!

-----Original Message----- 
From: Gordon Laco
Sent: Tuesday, October 25, 2011 1:53 PM
To: Alberg 30 Public List -- open to all
Subject: Re: [Public-List] Conversion of water tank to holding tank

Hi Roger  -

You're correct about the bladder tanks.  I wouldn't recommend one unless it
could be installed in a very smooth basin-like compartment... Sort of like
the interior of an integral tank!

By the way - we completed the 2011 Misery Cruise this past weekend.  The
weather was fairly balmy, wind was only 8-10kts but solidly steady.  No
misery.   So to get our pulses going we resolved not to use the engine.   We
actually beat up the Minnicognashene Channel taking 12 tacks to advance the
120 meter long narrow part.  Poor SURPRISE was only about 1.5 boat lengths
on the majority of those tacks before I called 'ready about - ABOUT' again
and again.  We had a yacht under power behind us but they were good sports
and cheered us on.  The evening on Saturday was lovely - not at all cold and
the stars were reflected on the still water, so looking down was nearly the
same as looking up.  The only flaw was that we are still in a year of
minimums for northern lights so didn't see any.  Later we retired to the
cabin and told old sailing stories while the woodstove glowed and the load
line in the Glayva bottle went down.

Coming home Sunday, the wind had gone south so after sailing off the anchor
we had to beat out through Minnicog again - dead upwind both ways!  Did it
in 9 tacks this time (starboard tack was a bit more of a 'gainer' this time)
then had a romping beat home, again with starboard tack being the gainer and
port the 'setter'.

Great trip, but no misery.  I'll have to try and squeak in another one
before freeze up really ends the season.  Pim take note...

Gord #426 SURPRISE


On 25/10/11 1:38 PM, "Roger L. Kingsland" <r.kingsland at ksba.com> wrote:

> Michael,
>
> I fiber glassed the areas under the aft end of the V berth to make 2, 20
> gallon+/- tanks; one for holding and the other for who knows what.  I 
> bought
> a 3 part polypropylene (same stuff used for holding tanks) coating system 
> to
> apply inside the compartments but haven't done it yet.
>
> I made full size plywood tops with a plan to apply a few coats then 
> install
> the tops when last coat is wet.  My only concern with coating the forward
> tank would be being able to reach all surfaces with a roller or paint 
> brush.
>
> RE bladder tanks, others on the page have indicated they can chafe and 
> leak
> which would be uber yucky.
>
> Roger 148
>
> -----Original Message-----
> From: public-list-bounces at lists.alberg30.org
> [mailto:public-list-bounces at lists.alberg30.org] On Behalf Of
> crufone at comcast.net
> Sent: Tuesday, October 25, 2011 12:37 PM
> To: Alberg, Public List
> Subject: [Public-List] Conversion of water tank to holding tank
>
>
>
> George and others,
>
> What about applying a coating to the inside of the water tank if human 
> waste
> does absorb into the fiberglass tank material? Could one install a 
> flexible
> bladder tank into the original water tank? Has anyone done either of these
> two procedures?
>
> Michael #133
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