Originally Posted by Mr. Dan
So you don't have a water heater TANK... but you do have a water heater, do you not?
Yes, sorry. Didn't mean to imply that.
Yes, have a tankless water heater. So a pipe to fill up a tank isn't needed. BUT, the tankless heater has to have a supply, and the blue line with valve has to be it. The blue line without valve is apparently where the intake from outside cold water is.
The red pipe with valve is where water comes out from water heater 'hot', and then goes to camper feeds via the red line without valve.
I did not mean to be obtuse, but I honestly couldn't figure this out originally. I probably shouldn't have posted this until I thought it out some more.
I appreciate the help.
(I think if the two blue pipes were bent into one pipe, and the two red pipes were bent into one pipe........it'd look like everyone else's. And I think someone above actually said that and I was too dumb to get it at that time)