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01-06-2018, 02:04 PM
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#1
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Member
Join Date: Nov 2016
Location: Boerne, Texas
Posts: 64
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water heater anode ?
My 2017 Jayco Jayflight has an Atwood water heater, after doing some research I understand it is an aluminium tank and does not require an anode. Does this make sense to you all? Thanks,
Tim
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01-06-2018, 02:17 PM
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#2
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Senior Member
Join Date: Dec 2014
Location: Akron
Posts: 3,209
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Yes, no anode. Had Atwoods for years, no corrosion issues at all.
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Rob R.
Akron, OH
2014 Seneca 37TS
Toads: 2019 Ford Edge ST or 2013 Ford Focus ST
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01-06-2018, 02:28 PM
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#3
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Senior Member
Join Date: Mar 2017
Location: Sarasota
Posts: 742
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Aluminium is just as susceptible to corrosion as many other metals...
I just took a look at mine, and found that the Atwood manual doesn't mention a sacrificial anode, but, when I opened the door and looked, there it is... :-)
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IanP, the man from Scotland
Julie, the Lady From Little Rock
Jay Feather 19XUD, pushing a Jeep Grand Cherokee
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01-06-2018, 02:48 PM
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#4
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Site Team
Join Date: Nov 2010
Location: Virginia`s Eastern Shore
Posts: 17,093
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My Attwood did not have an anode just a plug. My current Suburban has the anode and its half gone already after one year.
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2017 Coachmen Catalina 283RKS
2018 Ford F250 Super Duty 6.2l CCSB
2010 Jayflight 28BHS (sold)
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01-06-2018, 02:59 PM
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#5
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Senior Member
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 16,102
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Quote:
Originally Posted by WeRJuliian
Aluminium is just as susceptible to corrosion as many other metals...
I just took a look at mine, and found that the Atwood manual doesn't mention a sacrificial anode, but, when I opened the door and looked, there it is... :-)
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Someone had to add it. There are no anodes on any Atwood Parts lists.
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01-06-2018, 03:34 PM
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#6
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Moderator Emeritus
Join Date: Apr 2011
Location: Michigan
Posts: 9,424
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Quote:
Originally Posted by WeRJuliian
Aluminium is just as susceptible to corrosion as many other metals.....snip
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I would agree if a dis-similar metal is connected to it...., otherwise aluminum has a high resistance to corrosion.
Bob 
__________________
2016 GM 2500HD 6.0L/4.10
2018 Jay Flight 24RBS
2002 GM 2500HD 6.0L/4:10 (retired)
2005 Jayco Eagle 278FBS (retired)
1999 Jayco Eagle 246FB (retired)
Reese HP Dual Cam (Strait-Line)
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01-06-2018, 04:24 PM
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#7
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Senior Member
Join Date: Mar 2017
Location: Sarasota
Posts: 742
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Quote:
Originally Posted by Grumpy
Someone had to add it. There are no anodes on any Atwood Parts lists.
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OK, I had to go and look, this time with a toolkit...
Quite right.. it's a plug, where you'd expect an anode to be.
But, as soon as I can get one, there's going to be one in there..
__________________
IanP, the man from Scotland
Julie, the Lady From Little Rock
Jay Feather 19XUD, pushing a Jeep Grand Cherokee
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01-06-2018, 04:40 PM
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#8
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Member
Join Date: Nov 2016
Location: Boerne, Texas
Posts: 64
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Ok great so the consensus seems to be no anode necassary for the Atwood aluminium water heater. Thank you all for your replies.
Tim
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01-06-2018, 04:51 PM
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#9
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Senior Member
Join Date: Dec 2014
Location: Akron
Posts: 3,209
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Quote:
Originally Posted by WeRJuliian
OK, I had to go and look, this time with a toolkit...
Quite right.. it's a plug, where you'd expect an anode to be.
But, as soon as I can get one, there's going to be one in there..
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Be careful, I have heard stories of people adding an anode rod that had a steel plug supporting the anode itself. Then when it was time to remove the anode for draining, the steel plug had practically welded itself to the aluminum threads of the tank connection. Twisted off the tank bung requiring replacement of the tank itself!
__________________
Rob R.
Akron, OH
2014 Seneca 37TS
Toads: 2019 Ford Edge ST or 2013 Ford Focus ST
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01-06-2018, 08:44 PM
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#10
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Senior Member
Join Date: Mar 2015
Location: Port Orchard
Posts: 2,064
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Quote:
Originally Posted by Robbbyr
Be careful, I have heard stories of people adding an anode rod that had a steel plug supporting the anode itself. Then when it was time to remove the anode for draining, the steel plug had practically welded itself to the aluminum threads of the tank connection. Twisted off the tank bung requiring replacement of the tank itself!
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Yeppirs, and that's why the Atwood water heaters come with plastic plugs.
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Don
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01-06-2018, 11:11 PM
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#11
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Senior Member
Join Date: Mar 2017
Location: In the gnat capital of the world, Tifton, GA
Posts: 555
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Quote:
Originally Posted by hoppers4
Yeppirs, and that's why the Atwood water heaters come with plastic plugs.
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Exactly right.
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01-07-2018, 07:15 AM
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#12
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Senior Member
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 16,102
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Quote:
Originally Posted by Robbbyr
Be careful, I have heard stories of people adding an anode rod that had a steel plug supporting the anode itself. Then when it was time to remove the anode for draining, the steel plug had practically welded itself to the aluminum threads of the tank connection. Twisted off the tank bung requiring replacement of the tank itself!
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X-4
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01-07-2018, 09:18 AM
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#13
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Senior Member
Join Date: Dec 2010
Location: Wheatfield, New York
Posts: 1,069
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Mine has a plastic plug--no anode. I always thought the tank was plastic lined. Is this possible? I never see any trash come out when I empty it.
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 2009 Jayco Jay Feather 17C 130W Solar, 2021 F150 2.7L Eco Boost, 2021 Toyota Highlander
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01-07-2018, 09:48 AM
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#14
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Senior Member
Join Date: Mar 2017
Location: Sarasota
Posts: 742
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Quote:
Originally Posted by Robbbyr
Be careful, I have heard stories of people adding an anode rod that had a steel plug supporting the anode itself. Then when it was time to remove the anode for draining, the steel plug had practically welded itself to the aluminum threads of the tank connection. Twisted off the tank bung requiring replacement of the tank itself!
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Yes, cheap steel is a bad choice, for all sorts of reasons.
That's why brass is so commonly used in the plumbing business, it has a
higher "anodic index" than the other common plumbing metals... so it's worth making sure that, if you do fit an anode, the threaded mount is good old-fashioned brass. :-)
__________________
IanP, the man from Scotland
Julie, the Lady From Little Rock
Jay Feather 19XUD, pushing a Jeep Grand Cherokee
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01-07-2018, 09:57 AM
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#15
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Senior Member
Join Date: Mar 2015
Location: Port Orchard
Posts: 2,064
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This came from a brochure by Atwood.
"Atwood water heater tanks are constructed of a high strength aluminum.
The interior of the tank consists of a .0015 thickness of type 7072
aluminum (pure aluminum and zinc) that is fused to the core during the
rolling process. This material protects the tanks from the effects of heavy
metals and salts found in waters throughout the country. It is anodic to
these heavy metals and acts much like an anode in a steel glass lined
tank except it will last much longer. Aftermarket Anode Rods are not
required and should not be used and will void warranty."
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Don
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