[Public-List] Pre-liner water tank cover leaking

[Gordon Laco]

If I were facing this job I'd glue aluminium plates say 3/16" thick inside.
I'd drill and tap threads for little machine screws.  That would give you
something really solid to torque the screws into.

Gord #426 SURPRISE




On 03/05/11 12:36 PM, "Jeffrey" <fongemie at gmail.com> wrote:

> Thanks Roger,
> 
> I like the idea of the backing plate. Gord, thanks for mentioning the
> two-halves.  I can picture myself holding a nicely cut ring and
> wondering how I would get it through the hole. I guess I could add a
> ring to the outside if I have the clearance.
> 
> If I glued the backing ring on the top, I could drill shallow holes
> and epoxy a nut in each hole, then use machine screws. Or, imbed a
> machine screw with the treads up..but might be difficult to lock the
> screw in place.
> 
> -jeff
> 
> On Tue, May 3, 2011 at 11:28 AM, Gordon Laco <mainstay at csolve.net> wrote:
>> Great idea Roger.
>> 
>> I have seen kits that come with tanks where the backing material comes in
>> two halves so that they can be placed in the tank through the cut out and
>> clamped & glued to the inside.  Once the epoxy or whatever kicks off you can
>> drill and even tap threads in the backing... The result should be a set up
>> where you can put useful torque on the screws.
>> 
>> Gord #426 Surprise
>> 
>> 
>> On 03/05/11 11:24 AM, "Roger L. Kingsland" <r.kingsland at ksba.com> wrote:
>> 
>>> How about;
>>> 
>>> A), fasten a ring of that plastic wood (Star Board?) underneath so the
>>> screws have more to bight into (also gives you a "backer plate" under the
>>> bronze cover);
>>> 
>>> or, B), instead of screws, bolt thru the ring putting an EPDM (roofing
>>> material) washer w/ an ID slightly less than the bolt diameter between the
>>> ring and the hard washer?
>>> 
>>> Roger 148
>>> 
>>> -----Original Message-----
>>> From: public-list-bounces at lists.alberg30.org
>>> [mailto:public-list-bounces at lists.alberg30.org] On Behalf Of Jeffrey
>>> Sent: Tuesday, May 03, 2011 11:01 AM
>>> To: Alberg 30 Public List -- open to all
>>> Subject: [Public-List] Pre-liner water tank cover leaking
>>> 
>>> Hi everyone,
>>> 
>>> Seagrass is a pre-liner boat, and I'm using the original water tank in
>>> the port side v-berth. The tank is built in to the hull and has a
>>> simple 5 inch hole in the top where a bronze cover is screwed into the
>>> top of the tank. Trouble is, small screws into the thin fiberglass top
>>> of the tank hold poorly, and we keep getting leaks. If we fill the
>>> tank from the outside deck fill we need to be careful to fill the tank
>>> no more than 3/4 full or it leaks. I've taken the cover off, cleaned
>>> both surfaces, re-gooped with 4200 and reattached the screws and we
>>> still get leaks. The screws just don't hold well.  Note that the cover
>>> includes the fill pipe, and fittings that lead to the sink.
>>> 
>>> Anyone else go through this? have a fix?
>>> 
>>> 
>>> -jeff
>>> 
>>> 
>>> 
>>> Jeff Fongemie
>>> #116 Seagrass
>>> 
>>> http://picasaweb.google.com/fongemie
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>> 
>> 
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> 
> 



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