[Public-List] V berth water tank

[Jason S]

Dave,
Did you coat inside of tank.
.if so with what type of epoxy

Jason
#457 Salacia
Www.svsalacia.blogspot.com
On Jul 21, 2013 7:39 AM, "David Terrell" <dterrell1 at charter.net> wrote:

> I did what  George did and the result is excellent. I do not see a need
> for further changes. I used starboard for the top. Pictures  and a
> description are posted on the web site.
>
> David 432
>
>
> On Sat, Jul 20, 2013 at 4:40 PM, George Dinwiddie wrote:
>
>  Bill,
>>
>> On 7/19/13 10:07 AM, Bill Newman wrote:
>>
>>> My No. 233 is a non liner boat that I have owned for about 12 years.
>>> The water tank is fibreglass and is I believe, tabbed to the hull.
>>>
>>
>> The usual arrangement is a tank that uses the hull and some laid up glass
>> to form the bottom and sides. The top was generally a sheet of aluminum
>> bedded and pop-riveted across the flanges of the sides.
>>
>> The usual problems are that
>>  1. the fiberglas becomes saturated with water and slowly leaches into
>> the water
>>  2. the aluminum corrodes, flaking white aluminum oxide into the water
>>  3. the pop-rivets start to leak
>>
>>  Originally it had no inspection port so later I made one and found a
>>> very moldy plastic bladder inside the tank.  I removed this and
>>> thoroughly cleaned the interior of the fibreglass tank and used this
>>> for a few years until it began to leak.  I then cut a larger opening
>>> into the top and installled a bladder which does not conform well the
>>> the shape of the tank.  If it is completely filled it bulges out the
>>> opening and leaks some water no matter how well the fittings are
>>> tightened.  The result is that I cannot carry a lot of water with
>>> this arrangement.  I do not use the tank for drinking or cooking just
>>> for washing myself and the dishes.  I am thinking of temporalily
>>> removing some of the furniture from the v berth, then making a
>>> cardboard mock-up of a tank that fits the space and taking this to a
>>> tank maker to have it fabricated.  I am thin king of having this made
>>> of aluminum because there are several companies who will do this and
>>> a mold is not required.  I expect my experience is not unique.  My
>>> question is. has anyone had any experience  replacing the water tank
>>> under the v berth and if so any advice or information about how to
>>> proceed and the results will be much appreciated.
>>>
>>
>> I would not recommend using aluminum. Like the original aluminum top, it
>> will oxidize and flake white aluminum oxide into the water.
>>
>> The usual fix for the water tank is to
>>  1. remove the furniture
>>  2. remove the top of the tank
>>  3. clean the tank well
>>  4. coat the fiberglas walls with epoxy
>>  5. put on a new, non-aluminum top (high-density polyethelyne or
>> reinforced epoxy sheet) bedded with good caulk, and using self-tapping
>> screws instead of pop-rivets
>>
>> If you do this and add a charcoal filter, you should have water suitable
>> for drinking.
>>
>> Of course, you still need to clean the inside occasionally through a port
>> on the top, and you may want to dose with chlorine (plain chlorox) when you
>> fill the tank.
>>
>>  - George
>>
>> --
>>
>> ------------------------------**------------------------------**
>> ----------
>>   When I remember bygone days                         George Dinwiddie
>>   I think how evening follows morn;            gdinwiddie at alberg30.org
>>   So many I loved were not yet dead,           http://www.Alberg30.org
>>   So many I love were not yet born.                          also see:
>>                'The Middle' by Ogden Nash     http://idiacomputing.com
>>
>> ------------------------------**------------------------------**
>> ----------
>>
>>
>>
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