[Public-List] V berth water tank

[Jason S]

Thanks for answer...I have read that many people use west system on water
tanks......I would think a water tablet and  filter would take out most
contaminants. Especially if water water was not left sitting for long
periods...I have those same cracks, but wondered more about sealing out gel
coat....I may try it.
On Jul 24, 2013 8:59 AM, "David Terrell" <dterrell1 at charter.net> wrote:

> Jason
>
> I did some epoxy coating - there were hair line crack- crazing.  I did not
> slather it up with many coats of epoxy. I  used regular west marine epoxy.
> I was not concerned because I do not plan to drink the water. And,
> honestly, I do not know if there is a real problem with what I used.  I
> would be very interested in being enlightened on this topic by anyone in
> the know on this.
>
> David
>
>
> On Sun, Jul 21, 2013 at 8:45 AM, Jason S wrote:
>
>  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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