What do these drain

[Dallds]

2018 endurance 3556

Not sure what these drain.

 

[lcv800]

Was a dump for my fresh water.

 

[Ovalvw]

Freshwater dump valves. A couple times a year
I fill both of my freshwater tanks with a sanitizer for a few days
Then dump them just to keep it clean..
Especially when coming up on hurricane season
Here in Florida.
All our best central Florida