Is there an auto dump valve for fresh water?

[Alberto]

Is there an auto dump valve for fresh water?

As title, electrically operated?

 

[The laird]

In my fresh tank you unscrew lid in tank put you hand in under pump at recess and pull drain plug out and then dumps all fresh water to enable clean out etc

 

[Kontiki]

From what I found each manufacturer has its only set up, on my current van I have 2 switches next to each other on the control panel, one is for waste & the other is for fresh water. The switches operate electrical dump valves. To me having a simple mechanical valve works fine, having electrical switches/valves just over complicates & adds cost for a problem that isn't there.