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Old 10-03-2014, 08:16 PM   #21
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I open both low point drains then open the faucets to begin draining the lines and then proceed to open the pressure relief valve on the water heater. It should drain the water out of the heater. If you are not sure if it does for you then I suggest draining the water heater while there is still hot/warm water in it and feel if the water draining from the low point drains is hot. It should take about 15-20 minutes (at least on my camper) to drain the entire system.

lol..don't need to feel it. I do it the way the instructions say to by pulling the plug on the HW heater.

Just doesn't make any sense as the cold line should have a one way valve to keep hot water from escaping the heater and warming the cold lines of the trailer.
Maybe Jayco doesn't put those in their lines
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Old 10-03-2014, 08:57 PM   #22
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Jesus, just pull the plug, if no water comes out it is empty. lol
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Old 10-03-2014, 10:31 PM   #23
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Jesus, just pull the plug, if no water comes out it is empty. lol

Well... Yeah, but that's not the point. The point is, are there other ways the water may be drained from the water heater? I say yes, the LP drains will also drain the water heater, and now I want to figure out how. I'm curious like that, I like to know exactly how stuff works, it's one of my favorite parts of this hobby!
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Old 10-03-2014, 10:39 PM   #24
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I know on my trailer when I pull the low point drains, the hot water tank does not drain.
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Old 10-04-2014, 04:55 AM   #25
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Well... Yeah, but that's not the point. The point is, are there other ways the water may be drained from the water heater? I say yes, the LP drains will also drain the water heater, and now I want to figure out how. I'm curious like that, I like to know exactly how stuff works, it's one of my favorite parts of this hobby!
but even by your own post before it doesn't. You said you open the low point valves. they drain then stop. then you open the hot water heater and drain it. (this tells me it didn't drain with the low point valves). also more water starts again out of the low point valves (which would be the hot line going to the hot water heater since it has air behind it now)
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Old 10-04-2014, 10:33 AM   #26
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Ya, I did say that, and you could be right. But it also could be that it's a vapor lock, and it just drains the tank really slow. When I pull the LP drains, I also reach up and open both valves on the bathroom faucet, so there's air in the hot side from that. Like I said, you could be right, but I'm thinking I'm missing something and the tank drains from the LP. I won't know until I get my trailer back from the shop. Then I'll try some different things and see what happens.
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Old 10-04-2014, 10:49 AM   #27
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here is a easy solution. take the drain plug out of the bottom of the water heater. insatall a small valve into the drain plug, you can get them with a anode attached also. when you want to drain the water heater open the valve you just installed and the pressure relief valve on the water heater. I gurantee your water water will be empty.
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Old 10-04-2014, 10:59 AM   #28
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here is a easy solution. take the drain plug out of the bottom of the water heater. insatall a small valve into the drain plug, you can get them with a anode attached also. when you want to drain the water heater open the valve you just installed and the pressure relief valve on the water heater. I gurantee your water water will be empty.
this post was because the OP was concerned why his tank was empty. not how to go about emptying it.
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Old 10-04-2014, 05:46 PM   #29
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here is a easy solution. take the drain plug out of the bottom of the water heater. insatall a small valve into the drain plug, you can get them with a anode attached also. when you want to drain the water heater open the valve you just installed and the pressure relief valve on the water heater. I gurantee your water water will be empty.
I have the Atwood heater in mine. Do they sell drain valve kits for it or would it be just as easy to go to the hardware store and piece something together. The drain plug location is a pain on these.
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Old 10-04-2014, 06:14 PM   #30
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I have the Atwood heater in mine. Do they sell drain valve kits for it or would it be just as easy to go to the hardware store and piece something together. The drain plug location is a pain on these.

I think having a valve would make it difficult to flush the sludge out that can build up. you would be best to stay with the plug IMO
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