Good Sam Club Open Roads Forum: Tech Issues: Water heater plastic plug
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Water heater plastic plug

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 4  
Prev  |  Next
salem

Central Valley, Ca

Senior Member

Joined: 05/01/2004

View Profile


Offline
Posted: 01/09/20 08:06pm Link  |  Quote  |  Print  |  Notify Moderator

Excellent discussion with some really good information. Thanks all.

MrWizard

Traveling

Moderator

Joined: 06/27/2004

View Profile



Posted: 01/09/20 09:36pm Link  |  Quote  |  Print  |  Notify Moderator

Anode rods are magnesium
Not steel


Radiate The Happy
....

Connected using Verizon and AT&T
1997 F53 Bounder 36s


Lynnmor

Red Lion

Senior Member

Joined: 07/16/2011

View Profile



Good Sam RV Club Member


Posted: 01/10/20 01:26am Link  |  Quote  |  Print  |  Notify Moderator

The threaded portion of an anode rod is usually steel. The T & P valve is brass or bronze so maybe the drain plug could be as well. Expecting the tank to be the sacrificial anode seems like a bad idea and adding a rod should be a benefit. That paper thin layer of zinc is probably compromised at bends and fittings just like the glass lining of steel tanks that need an anode rod for that reason.





NRALIFR

Truck Camping Out West

Senior Member

Joined: 11/27/2005

View Profile



Posted: 01/10/20 05:41am Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor-
Apparently, part of the manufacturing process for Atwood (now Dometic) aluminum water heater tanks is suspending the laws of physics inside them. According to the interweb experts, they are the only aluminum vessels on earth that will NOT react and corrode in the presence of water. Buy an aluminum boat, it will have an anode. An aluminum fresh water storage tank, it needs an anode.

In reality, Atwood/Dometic makes no claims that the cladding in their tanks will prevent corrosion. In fact, they acknowledge that the cladding is the sacrificial anode, and that in the presence of certain types of water, corrosion can happen very quickly, and pinholes can form in the tank. Or at least they did before the company was acquired by Dometic. Their documentation is completely different now.

It’s also not true that your warranty will be void if you use anything other than the plastic (oops, nylon) plug. The actual wording in their warranty document is: “damage or failure caused by installation of accessories not manufactured and marketed by the Seller or any non-Dometic parts that are installed as replacement parts”. The key words are “damage or failure caused by”. That’s a pretty standard position for a manufacturer to take regarding warranty coverage.

The warranty on water heaters is two years, so the smart thing to do would be to use the recommended plug during the warranty period, then do what you want after that. Unless you’re spending long periods of time in an area with sub-par water, your WH will most likely last much longer than that. Mine’s nearly 20 years old, and other than the original plug, it’s always had something other than the nylon plug in the drain hole. The brass petcock that’s in it now has been there for several years, and I’ve removed it periodically to flush the tank.

I’ve also used an anode rod, and as long as it’s more anodic than the tank cladding, then the rod will corrode rather than the tank. That’s just how it works. I use either thread tape or Rectorseal on the threads. It doesn’t leak, and the threads are fine.

If you do happen to damage the threads (which can happen even with the nylon plug), provided it’s not too bad there is such a thing as an NPT tap or thread chaser.

[emoticon][emoticon]

* This post was last edited 01/10/20 10:01am by NRALIFR *   View edit history


2001 Lance 1121 on a 2016 F450


wa8yxm

Wherever I happen to park

Senior Member

Joined: 07/04/2006

View Profile


Offline
Posted: 01/10/20 05:51am Link  |  Quote  |  Print  |  Notify Moderator

cavie wrote:

The plug is not plastic. It is nylon. Why do people constantly try to reinvent the wheel?


Uh. Nylon is a man made product (Man made silk replacement if it's spun into find threads) and the word plastic means MAN MADE

So nylon is a type of plastic.. True there are many types of plastic. but NYLON is one of them. So for those of you who have been calling it "Plastic" it is

And for those who call it NYLON.. that too.

Both words are correct.


Home is where I park it.
Kenwood TS-2000 housed in a 2005 Damon Intruder 377


dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 01/10/20 05:52am Link  |  Quote  |  Print  |  Notify Moderator

1. If you follow the manual and DRAIN your Atwood at least once a year,(better 3 or 4 times), you will not have a corrosion problem
2. Even HOME water Heaters require draining once a year and they do have anode rods.
3. I would like to see how a NYLON thread could damage the Metal threads in a tank---- ridiculous to state this. I Have never seen it in 40 years. You can cross thread the Nylon, but that just ruins the Nylon plug
4. ALL this talk and the simple thing is to just use the Nylon plug in Atwood. Is it really that hard and such a big deal? Just be proactive and drain your Water Heaters(Suburban and Atwood) on a regular basis. Takes 5 minutes.
5. ALWAYS drain either brand water heater when you are not going to use the RV for awhile. The water goes BAD in both brands and can smell awful

MFL

Midwest

Senior Member

Joined: 11/28/2012

View Profile



Good Sam RV Club Member

Offline
Posted: 01/10/20 06:03am Link  |  Quote  |  Print  |  Notify Moderator

MrWizard wrote:

Anode rods are magnesium
Not steel


Partly correct, the anode rod is magnesium, but an aluminum rod is also available from Suburban. You may have misinterpreted my earlier post, meaning the plug is steel, not the rod.

Good to know that Atwood plug is nylon, not plastic.[emoticon]

Jerry





Roger10378

Goodrich, MI.

Senior Member

Joined: 05/29/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 01/10/20 06:45am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

cavie wrote:

The plug is not plastic. It is nylon. Why do people constantly try to reinvent the wheel?


Uh. Nylon is a man made product (Man made silk replacement if it's spun into find threads) and the word plastic means MAN MADE

So nylon is a type of plastic.. True there are many types of plastic. but NYLON is one of them. So for those of you who have been calling it "Plastic" it is

And for those who call it NYLON.. that too.

Both words are correct.


You need to take this one step further. Nylon is a brand name. Most of what we call nylon is not because it is made by someone other than the brand holder.


2005 Cardinal 30TS
2007 Chevy 2500HD D/A

GDS-3950BH

DC

Senior Member

Joined: 12/08/2019

View Profile


Offline
Posted: 01/10/20 06:55am Link  |  Quote  |  Print  |  Notify Moderator

Roger10378 wrote:

wa8yxm wrote:

cavie wrote:

The plug is not plastic. It is nylon. Why do people constantly try to reinvent the wheel?


Uh. Nylon is a man made product (Man made silk replacement if it's spun into find threads) and the word plastic means MAN MADE

So nylon is a type of plastic.. True there are many types of plastic. but NYLON is one of them. So for those of you who have been calling it "Plastic" it is

And for those who call it NYLON.. that too.

Both words are correct.


You need to take this one step further. Nylon is a brand name. Most of what we call nylon is not because it is made by someone other than the brand holder.


WTF? ROFLMAO!

SoundGuy

S Ontario

Senior Member

Joined: 02/11/2015

View Profile



Posted: 01/10/20 06:58am Link  |  Quote  |  Print  |  Notify Moderator

salem wrote:

That what I was thinking, Sound Guy, thanks. So, what are the Suburbans made of. Metal?


Porcelain lined steel tank so Suburban does supply every model sold with an anode rod.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 4  
Prev  |  Next

Open Roads Forum  >  Tech Issues

 > Water heater plastic plug
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.