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Old 08-08-2010, 12:50 AM   #15
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for what it's worth, I was told to use only nylon fittings in the water heater, no plastic (PVC) and no brass.
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Old 08-08-2010, 04:12 AM   #16
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The reason is because of dis-similar metals. Doing so will cause gaulding as well as electrolysis problems. The anode rod threaded base is steel. You do not want a steel plug or rod put into an aluminum tank. Wayne is technically correct; nylon plugs are to be used. I used the the word "plastic" (easily identifiable) for comparison to an anode rod. Owners can quickly relate to the differences.
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Old 08-08-2010, 07:29 AM   #17
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Unfortunately, there are countless aftermarket items available that are solutions to non-existent problems.
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Old 08-08-2010, 08:27 AM   #18
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Quote:
Originally Posted by RVhauler View Post
If the plastic plug is not available then suggest a brass plug to replace it. Available from Lowes/Home Depot/menards
One could use a brass plug, but it is risky. The tank is made out of aluminum and the plastic plug is used so that the threads on the plug will strip before the tank threads. The tank metal is relatively soft and if a brass plug is used, the tank threads would strip out before the plug. Much more expensive to repair/replace the tank than a plug. I carry a spare plastic plug in the trailer, just in case....
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Old 08-08-2010, 10:53 AM   #19
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I'm glad we are in the same boat! I'm all for not using it. I could care less either way. It was a $20 part, and lord knows I've wasted more. However, I just want to know the WHY behind it. In my main hobby (cigars) there is a lot of 'rules' out there that people just blindly follow-and I've learned to ask 'why is that?' and try to find the real reason before I just jump on a bandwagon or listen to a single post online. I'll take the plug out, but I want to really know it isn't supposed to be there before I go and do such a thing.
If the information does not help you in post#12 and follow up posts its your decision to use anode rod in Atwood heater.
I have not heard from anyone that has used one in Atwood for results in using a rod maybe we will and will know what happened to tank after use.
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Old 08-08-2010, 11:29 AM   #20
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I used an anode rod in my Atwood and it created a big mess. Even getting the old plug/rod out was a real challenge. The threads weren't welded together... I guess the teflon tape had protected against that, but the anode had corroded to the tank and had to be pried out very carefully. That was followed by a great deal of chipping with an ice pick and any other tool I could fashion to get as much of the crud out as I could.

I think I'm really lucky that I didn't lose the entire heater but it's still working well.
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Old 08-08-2010, 11:38 AM   #21
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Originally Posted by 007";682068]If the information does not help you in [B][URL="http://www.irv2.com/forums/f54/water-heater-has-no-anode-rod-72943.html#post681906
post#12[/URL][/B] and follow up posts its your decision to use anode rod in Atwood heater.
I have not heard from anyone that has used one in Atwood for results in using a rod maybe we will and will know what happened to tank after use.
Post 12 did not answer my question, but Mike did in post 17. A link to the manual is great and all, but the manual for my truck doesn't show lift kits and superchargers, and I've seen both done. I'm not trying to pick on anyone here, I just wanted an actual reason for why not to do it, instead of just "don't do it". If I go and tell my brother in law not to put one into his trailer, he is going to ask me why. If my answer is just "cause I read it online" it won't hold much weight. Being able to explain the potential damages will actually explain a point.
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Old 08-08-2010, 08:39 PM   #22
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I would think RickO has answered the question what will happen using a anode rod in Atwood water heater. Thanks Rick.
Nobody is trying to put anyone on the spot, others may need to know and now we have it.
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Old 08-08-2010, 09:09 PM   #23
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IF the drain plug was plastic and the Water heater is an Attwood: NO anode is normal

If the drain plug is Metal and the WH is a Surburan... It might be but usually not.

NOTE: on an atwood do not use a metal plug UNLESS

You put plastic between drain outlet and the plug (Example. a plastic nipple followed by a plastic coupler and then the metal plug or a plastic 30 degree street elbow and then a metal plug) no metal to metal allowed. Corrosion issues.
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Old 11-24-2010, 11:42 PM   #24
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I called the Attwood technical line and the technician told me to never use an anode rod in an Attwood water heater. The reason he gave me was that the reaction between the anode rod and the aluminum tank will allow the anode rod to weld it's self into the water heater and be impossible to remove, thus requiring a new water heater tank. The technician also said that any Attwood water heater with an anode rod installed would not be under warrantee. Regards nm1oqrz
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Old 11-25-2010, 04:16 AM   #25
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I put a steel Shutoff valve on mine the kind used under the sink in the house, I used a lot of tefflon tape; That is on a 2000 year coach, no problen, I drain the tank whanever it is not used for a month or more., Oh I also weld/repair the Atwood tank. Aluminum is like a spunge and In time with pressure on it, it will absorb water and start to coreode, The time peroid depends on the type of water;; My ruel of thumb is a water tank not taken care of lasts 10 years; if it is taken care of drained flushed regularly , it is a 20 year tank. life is good
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Old 11-25-2010, 07:20 AM   #26
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Thanks to you both on your updates to a old thread.

With all thats been said, bet there are still some rods in Atwoods.
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Old 11-27-2010, 11:45 PM   #27
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I realize this thread is 3 months old, but this information might be useful to RV owners, whichever brand water heater they have. The Galvanic Series: http://www.corrosion-doctors.org/Def...nic-series.htm rule which metals are compatible and which react with another. The further apart- from center, the more reactive the metals become. Brass is nearly neutral, which is why a brass plug may be used in an aluminum tank; but a non-metal plug is still best.
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Old 10-05-2011, 04:40 PM   #28
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Recently installed a newer Atwood xt model and it doesn't even allow you to install the after market rods in it anymore. Also the plastic plugs are used as a back up safety plan in case the t-stats get stuck or relief valve wont pop off. It will melt the plastic plug so the tank wont explode.
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