Low Point Drains
The fresh water drain valve is usually attached to the fresh water tank itself. It will drain by gravity alone.
The red drain is probably the hot water low point intended to drain the hot water pipes. The white one next to it may be a low point drain for the cold water pipes.
I can't say for sure. If it drains many gallons when pump is off, it is the fresh tank drain. If it drains a quart or so it is the cold water low point drain.
Dutchman Kodiak Cub KD176RD 2018
Nissan Pathfinder 2015