It's an affliction...can't stop thinking of questions

BandJCarm · 05-17-2016, 09:05 PM

And I'm not even near the unit.

Sigh.

Why do I have two cold and two hot lines? Only one of each has a valve. Every diagram shows only one of each.

????

HONDAMAN174 · 05-17-2016, 09:51 PM

My guess is the lines with the valves come directly from the water heater. Then the head back into your unit to go to the different sinks and such.

The way yours is set up is for easy winterizing- if you use anti freeze.

My winterizing is easy- I don't!! 😝

2014 Evo 2850 "Woodstock"
2011 Toyota Tundra "Clifford"

rockfordroo · 05-17-2016, 09:59 PM

Quote:

Originally Posted by BandJCarm

And I'm not even near the unit.

Sigh.

Why do I have two cold and two hot lines? Only one of each has a valve. Every diagram shows only one of each.

????

Look at the HWH in the upper right corner of the attached plumbing drawing. Now take the hot line that goes right, and bend it up and around to it points to the left. Then take the cold line that goes right (and then down) and bend it back so it points to the left. Then it will look just like yours.

In other words, the blue line without the valve is the cold water feed to the HWH and the red line without the valve is the hot water feed to the camper.

**Bama Rambler** · 05-18-2016, 11:37 AM

As rockfordroo eluded to, you only have one in and out. It just looks funny the way they plumbed it.

rockfordroo · 05-18-2016, 11:58 AM

I'm guessing it was done that way in order to put all your valves in one convenient place. (They DO think about us users every once in a while!)

325BH · 05-19-2016, 02:31 PM

The top blue line with the valve is input to the water heater. That valve is open, allowing water to fill the tank.

The bottom red line with the valve is water coming out of the water heater. That valve is open, allowing water to flow out of the tank.

The valve on the vertical, between the blue and red is closed, forcing water to go into the water heater.

The bottom blue line is your water source. The top red is hot water going to the rest of the camper.

The two open valves I mentioned must be open AND the closed valve I mentioned must be closed for water to correctly flow through the water heater.

For winterizing, the two open valves I mentioned must be closed AND the closed valve I mentioned must be opened. This will force water to bypass the water heater.

Don't forget to remove the anode rod to drain the water heater

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BandJCarm · 05-19-2016, 02:33 PM

Good info and many thanks. What you said does help. But, I don't have a water heater tank.

I do think I have it figured out though. I'm almost 80% sure I do!! LOL

325BH · 05-19-2016, 02:33 PM

Some rigs only have one valve... in conjunction with a one-way-check-valve on one of the water heater points, usually the hot side.

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325BH · 05-19-2016, 03:25 PM

No water heater. That plumbing makes no sense then. Blue is cold; red is hot.

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**Mr. Dan** · 05-19-2016, 03:26 PM

Quote:

Originally Posted by BandJCarm

Good info and many thanks. What you said does help. But, I don't have a water heater tank.

So you don't have a water heater TANK... but you do have a water heater, do you not?

BandJCarm · 05-19-2016, 03:36 PM

Quote:

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)

mike.t · 05-20-2016, 11:23 AM

rockfordroo · 05-20-2016, 09:27 PM

Quote:

Originally Posted by BandJCarm

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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