The water cap on my 69 appears designed not to be air tight. There are two
cut outs into the interior diameter of the screw surface. There is no
gasket. I always assumed this was to ventilate the tank as water is drawn
from it. My motorhome has a separate vent small plastic tube, which has the
added benefit of also venting air as water is poured into the tank. My
trailer likes to spit a little back at ya.
Jim
Behalf Of RJ & Krista
> there is a corkgasket under the cap, so the seal is pressure tight, '65
Caravel
>
> Dave Huffman wrote:
> > .... is that cap necessary to seal
> > the pressure for the tank? Or is there a valve lower down?
> >
> > Huff
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