[C320-list] Aft water holding tank leaks

[Marek Fluder]

My inspection caps in both tanks were leaking and I have replaced large
o-rings as they were cracked and deteriorated.
To get a good seal the caps have to be on very tight - possibly Graeme's
solution is better.
I leave both tanks connected all the time and fill them only through the
forward deck fitting.
The forward tank is slightly higher than the aft and when both are not
separated the aft tank will overflow providing you are filling slowly.
I would like to add a water level monitor for the front tank to know when
it is just about empty before running dry and loosing prime in the pump.

Marek
#1028



On Thu, Jul 9, 2015 at 3:13 PM, Graeme Clark <cg at skyflyer.co.uk> wrote:

>
> Ted
>
> The fundamental problem is not the stopcocks but the fact that your
> inspection plate leaks! Even with the front tank empty if your aft tank is
> full and the boat is pitching and rolling, water will slop out of the
> inspection plate and end up in the bilge
>
> Remove the plate - on my boat it is a threaded bung with a large square
> boss on top -  and wrap the thread with several turns of PTFE tape.  If you
> want to be sure, take some PTFE tape first, and twist it into a thread
> which you can wind into the grooves of the thread and then put a few turns
> of flat tape over the top to hold it in place.
>
> Be careful not to over-tighten though.
>
> I did this three years ago when we found it leaking and no problem since.
>
> As an aside I recommend using the stop-cocks to only us one tank at a time
> and then (a) you get a warning you are running low when the first one runs
> out and (b) if theres ever any contamination (some idiot puts salt water or
> diesel into the tank) you can isolate it.
>
> Best wishes
>
> Graeme
> #366
> > Re: Aft water holding tank leaks
>
>
>