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Old 08-02-2016, 08:20 PM   #1
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Draining Fresh Water Tank

Ok, I am wanting to drain the fresh water tank for the first time. I have the 2015 REV. So, all I need to do is unplug the red/blue low drains under the rig, Do I also need to turn on pump. There is no more water coming out and both indicators show that the tank is 1/3 full. How to I get all or most of the water out? I've tried shaking etc. I also put more water in the tank and then pulled the plugs and water came out. Maybe something is wrong with the sensors? Ugg, there is more to this then I thought! Still haven't figured out how to get hot water from the Atwood ONdemaND system to will take then in.

TIA,
Kathy
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Old 08-02-2016, 08:24 PM   #2
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Your fresh tank should have its own single drain valve. Sometimes just a cap to screw off, sometimes a valve to turn. The red and blue are low point drains for removing water from all lines, like winterizing.
No pump needed to drain fresh tank.
(At least that how my trailers have been. Your dynamax may be different. Maybe a D owner will chime in. Good luck.
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Old 08-02-2016, 09:18 PM   #3
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Mine looks like this.
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Old 08-02-2016, 09:22 PM   #4
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Found this dynamax pic on another thread. Yours may be like this.
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Old 08-02-2016, 09:22 PM   #5
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Read here. Fresh water tank drain valve?
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Old 08-02-2016, 11:08 PM   #6
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Originally Posted by kathybrost View Post
Ok, I am wanting to drain the fresh water tank for the first time. I have the 2015 REV. So, all I need to do is unplug the red/blue low drains under the rig, Do I also need to turn on pump. There is no more water coming out and both indicators show that the tank is 1/3 full. How to I get all or most of the water out? I've tried shaking etc. I also put more water in the tank and then pulled the plugs and water came out. Maybe something is wrong with the sensors? Ugg, there is more to this then I thought! Still haven't figured out how to get hot water from the Atwood ONdemaND system to will take then in.

TIA,
Kathy
Posts 4 and 5 by dcheatwood will point you in the right direction. It is a pull valve.

We have different years so I don't know if yours is the same as mine. The valve has a T handle is is small. It only pulls out an inch or so, don't force it.

Mine is on the left side with access via the propane compartment door. You have to look in about a foot or two to see it. Other years or models my be further back and closer to the sewer drain.

BTW, it takes a good while to drain that tank.
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Old 08-03-2016, 04:44 AM   #7
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Originally Posted by kathybrost View Post
Ok, I am wanting to drain the fresh water tank for the first time. I have the 2015 REV. So, all I need to do is unplug the red/blue low drains under the rig, Do I also need to turn on pump. There is no more water coming out and both indicators show that the tank is 1/3 full. How to I get all or most of the water out? I've tried shaking etc. I also put more water in the tank and then pulled the plugs and water came out. Maybe something is wrong with the sensors? Ugg, there is more to this then I thought! Still haven't figured out how to get hot water from the Atwood ONdemaND system to will take then in.

TIA,
Kathy
AH, those are not your tank drain, those are low point drains. Those are used for draining the pipes (open faucets when you do that). You tank drain valve is elsewhere.
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Old 08-05-2016, 08:39 AM   #8
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we might be getting scammed here

I have the exact motorhome - drained it late last fall ?
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Old 08-05-2016, 09:23 AM   #9
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AH, those are not your tank drain, those are low point drains. Those are used for draining the pipes (open faucets when you do that). You tank drain valve is elsewhere.
Ohhhhhhh that makes so much more sense now. I've been wondering why I've got to use the pump to drain the tank

Sooo.... anybody care to clue me in on where the tank drain is on the DX3?
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Old 08-05-2016, 09:25 AM   #10
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Where is the drain for the fresh water? I've looked everywhere. I found two towards the rear (blue and red one), told those are used when you are winterizing. Found a blue hose towards front, near propane tank area, with a black pull lever, pulled it, but really just dripped? Not sure if that is it?

Still no hot water from the Atwood tankless, tried everything, so will have to take it in.

Only other thing I noticed, is I fill the tank and both inside and outside say full, I go and run the water for a little bit to clear the lines, and in no time, the gauge says 1/3 full? So confused sometimes...
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