Free 7 Day Trial RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > National RV Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 10-29-2011, 12:32 PM   #1
Senior Member
Theberrys's Avatar
National RV Owners Club
Join Date: Jun 2009
Posts: 2,618
Anode Rod in a Atwood Water Heater

The word on the street is you don't need an Anode Rod in a Attwood Water heater. Here is a picture of one I just removed from my Attwood six gallon heater after a year.
I think I'll buy another one...... I'm just saying!!!

Attached Thumbnails
Click image for larger version

Name:	DSCF0315.JPG
Views:	268
Size:	49.7 KB
ID:	15168  
1999 Tradewinds 7372 Cat 3126
Albuquerque, NM
Theberrys is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 10-29-2011, 12:47 PM   #2
Senior Member
wa8yxm's Avatar
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,023
As I recall at one time Attwood DID make a heater that used an anode rod.

However the current models do not.. they come with a nylon plug instead.
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 10-30-2011, 12:18 PM   #3
Senior Member
Theberrys's Avatar
National RV Owners Club
Join Date: Jun 2009
Posts: 2,618
Well after a bit more study I find.... I brushed off the rod to find the white stuff is the rod material as designed.
Anode rods are effective on ferrous metals.... and Aluminum is non-ferrous. So although it appears the rod had collected minerals, the minerals on the rod are the rod it's self.
It's possible a Anode Rod in an Aluminum tank adds to the problem and not only is unnecessary but may contribute minerals to the tank.
Attached Thumbnails
Click image for larger version

Name:	rod brushed.jpg
Views:	282
Size:	55.2 KB
ID:	15208  
1999 Tradewinds 7372 Cat 3126
Albuquerque, NM
Theberrys is offline   Reply With Quote
Old 10-30-2011, 12:37 PM   #4
Moderator Emeritus
RickO's Avatar

Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
As a newbie, I bought a new 40 DP. The dealer made a big mistake and told me I had to replace the nylon plug with an anode plug. A year later when I went to replace it I found it to be completely eroded... leaving a huge mess in the bottom of my tank. The threads of my drain opening were damaged to the point where I can now not even get a nylon plug to go in so I'm continuing to use the metal drain plug with several wraps of Teflon tape.

Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

2007 Itasca Ellipse 40FD
RickO is offline   Reply With Quote
Old 10-30-2011, 12:51 PM   #5
Senior Member
Dave78Chief's Avatar
Join Date: Jun 2009
Posts: 1,528
Atwoods position on the topic:

Pinhole leaks from galvanic corrosion may cause the water heater tank to fail. Microscopic particles of metals (like iron and copper) suspended in water, set up a reaction inside the water heater that is not unlike the principle on which an automotive battery operates. The aluminum tank is the anode and the metals in the water serve as the cathode. Consequently, the aluminum gradually sacrifices itself and aluminum particles are carried away with the water flow.
A white scaly material (aluminum oxide) often is formed around the points where the heaviest action is taking place and heat accelerates the process. Severity of the problem varies considerably in different locales depending on the metal and mineral content of the water. White deposits inside the water heater tank are usually from water impurities that have settled out.
Periodic flushing of the water heater tank under pressure is recommended to slow down this process. For flushing instructions see your owners manual or contact Atwood for a copy of our recommended procedure.

The Atwood water heater tank is constructed of a core of high strength aluminum. The interior of the tank consists of a 15% thickness of type 7072 aluminum (pure aluminum and zinc) that is fused to the core during the rolling process.
This material protects the tank from the affects 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. There is also no need to replace an anode on a yearly basis. Flushing the tank on a regular basis has been found to be helpful in insuring the best performance of your water hater and adding to the useful life of the tank. For flushing instructions see your owners manual or contact Atwood for a copy of our recommended procedures.

Dave in Virginia
1978 Winnebago Chieftain
Dodge M400 - 440-3
Classic Winnebago Site:
Dave78Chief is offline   Reply With Quote

heater, water, atwood

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Leaking Atwood Hot Water Heater bob109 RV Systems & Appliances 0 03-19-2011 09:36 PM
Atwood Water heater countrypair RV Systems & Appliances 1 10-12-2010 04:15 AM
How to install an Atwood water heater door (10 gallon) Bruce and Jenna RV Systems & Appliances 2 05-26-2010 10:34 PM
American Appliance water heater and a anode rod Rick Tillman RV Systems & Appliances 2 08-01-2007 12:45 AM
Atwood Water Heater Jim 007 MH-General Discussions & Problems 7 04-13-2006 06:32 AM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 12:20 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.