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Old 05-19-2016, 04:36 PM   #11
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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)
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Old 05-20-2016, 12:23 PM   #12
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Old 05-20-2016, 10:27 PM   #13
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Originally Posted by BandJCarm View Post
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)
Now you've got it! Even with a tankless HWH, you still need to isolate the goes in and goes out and bypass it so you can winterize without putting antifreeze into the tankless heater. So the valving is the same irrespective of a tank heater or tankless heater.
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