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Old 10-16-2011, 07:42 AM   #1
CygnusSailor
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The owners manual says to remove the anode to drain the hot water heater. Is this really necessary? I had the low point drains open and then opened the pressure relief valve which seemed to drain the hot water tank. I then pumped a small amount of pink antifreeze into the water heater. Should this be adequate?



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Old 10-16-2011, 08:09 AM   #2
martinstwopopfarm
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I pull the drain plug on mine. Use bypass valves when I use antifreeze in the supply lines
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Old 10-16-2011, 08:16 AM   #3
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If you take the drain plug out of the water heater, there is no reason to pump any anti freeze into the heater.



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Old 10-16-2011, 09:04 AM   #4
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The only thing I see that looks like it might be a drain plug is a plastic hex head about 3/4". It is on the outside of the camper under the pressure relief valve. Is that the drain plug???

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Old 10-16-2011, 09:17 AM   #5
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That's what mine looks like. Open your relief valve and then take that plastic plug out and you should get some water.



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Old 10-19-2011, 12:22 PM   #6
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Depending on model, the drain plug is plastic (Atwood heaters) or metal with an anode rod (Suburban heaters). I also believe the Atwood plastic is 7/8" socket, and the Suburban is 1 1/16". We have an Atwood...which has an aluminum tank.

Ditto on the bypass. I hear filling tank makes hot water smell funny and wastes 6 gal of antifreeze.
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Old 10-20-2011, 09:48 AM   #7
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First of all I agree with all the above. No need to put the antifreeze in the WH. I have heard it's not good for it. Use the bypass valves inside at the water heater tank to bypass when using the pink stuff. Second, with every camper I've owned. The first thing I do is replace my plastic plug with a brass plug that you can open and close without removing the plug everytime.(See picture below). Just open the valve on the plug and flip up the pressure relief valve. Saves alot of time and scratched knuckles. You can take your plastic plug to about any auto parts store. There are several differant size threads; so take the plastic plug for reference. Make sure you use plumbing tape on the plug threads when replacing so you have a tight seal. Good luck.



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Old 10-20-2011, 10:41 AM   #8
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ditto on deputy dog's brass valve . that is the first thing i changed on our camper . so much easier to drain . we call it a petcock . like on your cars radiator . any RV store sells them . just take the plug in and match it up size wise . put some plumbers tape on the threads,screw it into the threaded openingand you will never have to fool with a drain plug anymore.
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Old 10-20-2011, 11:40 AM   #9
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Petcock. Couldn't remember what it was called. You're right. Here is a better picture.



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Old 10-20-2011, 12:38 PM   #10
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While the petcock makes it easy to drain the water heater, some experts recommend removing the plug and using a "clean-out wand" attached to a water hose to flush out debris, crud, etc that may accumulate in the bottom of the tank. Not sure where all that junk comes from, but I would rather not have it in there.
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