[C320-list] Swtiching between fresh water tanks

[John Meyers]

My #406 1997 the valves are under the galley sink.  I once left both open
when both tanks were full and it appears that the higher forward tank
gravity fed the aft tank under the aft berth. From there the water leaked
out of the poorly sealed inspection port and eventually out via the bilge
pump.

John Meyers

On Thu, May 16, 2019 at 5:51 PM Scott Thompson <surprise at thompson87.com>
wrote:

> I've never had that problem on my 1999 boat even though I leave both
> valves open all the time. I'm wondering if it's related to the placement
> of the valves. I have the valves under the aft cabin berth on the port
> side, right next to the pump. Perhaps the "sucking air" issue occurs
> when the valves are further removed from the pump after moving them to
> the location under the galley sink. This might change the flow of water
> between the two tanks when both valves are open.
>
> BTW, did you really mean "port side tank?" My aft tank is on the
> starboard side.
>
> Scott Thompson
>
> Surprise (#653)
>
>
> On 5/16/2019 2:37 PM, Dave Hupe wrote:
> >   On my 1994 Cat320 (#32)  I have a forward (v-berth) water tank and
> another under the main cabin port couch. The v-berth tank sits slightly
> higher. Both tanks feed to a common line and each tank has its own shutoff
> valve on the tank (not very convenient). Like John Dean described, I find
> that if I leave both tank valves open, when the forward tank runs dry the
> port side tank acts like it's empty too (apparently the system sucks air)
> even though there may be plenty of water in the port tank.  So, I pump
> water first from the v-berth tank and keep the port tank valve closed until
> I start to lose water, then I close the forward tank valve and open the
> port tank valve.
> > Dave Hupe
> > Holland, MI
> >
> >
>
> --
> Scott Thompson
> Surprise, #653
>
>