[C320-list] Swtiching between fresh water tanks

[Scott Thompson]

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