Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-10-2024, 10:59 AM   #1
V29
Winnebago Camper
 
Join Date: Jan 2024
Posts: 18
Water Heater Anode Question?

I just changed my water heater anode before going on a trip. I know how it works, dissolves, .... is the white calcium coming out of the water in the heater or .... ? I do not recall seeing that much on it before.

FYI, I flush/rebleach my fresh water tanks every month with apx 4-6 ounces - no comments necessary on the latter. I've done that on my boats for nearly half a century keeping the tanks fresh / sanitary / clean between uses.
Attached Thumbnails
Click image for larger version

Name:	20240209_132320.jpg
Views:	7
Size:	192.4 KB
ID:	188336  
V29 is offline   Reply With Quote
Old 02-10-2024, 11:21 AM   #2
Winnebago Master
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 1,968
That is normal degradation of the sacrificial anode. It is preventing your water heater tank from corrosion according to design Somewhere you encountered very hard water. IMO That one still has some life remaining. I realize you already know that from boating experience.
This is a better explanation: https://www.thervgeeks.com/rv-water-heater-anode/
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA. "We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution." Abraham Lincoln
Ray,IN is offline   Reply With Quote
Old 02-10-2024, 02:36 PM   #3
Site Team
 
creativepart's Avatar
 
Join Date: Sep 2009
Location: Spring Branch, TX
Posts: 7,715
What RV do you currently have? You've posted about perhaps ordering a 2025 Vista 29V, but your profile doesn't have any into about what you have right now.

Depending on your Water Heater brand, an anode rod may not be needed at all. But without knowing what you have it's impossible to comment.
__________________
2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
creativepart is offline   Reply With Quote
Old 02-10-2024, 04:27 PM   #4
V29
Winnebago Camper
 
Join Date: Jan 2024
Posts: 18
Quote:
Originally Posted by Ray,IN View Post
That is normal degradation of the sacrificial anode. It is preventing your water heater tank from corrosion according to design Somewhere you encountered very hard water. IMO That one still has some life remaining. I realize you already know that from boating experience.
This is a better explanation: https://www.thervgeeks.com/rv-water-heater-anode/
Thanks for the link. As I said, I am familiar; I have just never seen it look like that. I probably removed them more into the life cycle and they are more used up. Just not familiar with the white lumps. Most anodes just dissolve away vs gaining a calcified look to them.
V29 is offline   Reply With Quote
Old 02-10-2024, 04:54 PM   #5
Winnebago Master
 
Oldchinahand's Avatar
 
Join Date: Mar 2017
Location: Tucson, AZ
Posts: 531
V29, in response to your specific question, that white crusty material is an assortment of compounds formed as the anode oxidizes. To work, an anode must be higher on the galvanic scale than the material it is protecting. i.e., typically magnesium or aluminum to protect steel, or magnesium to protect aluminum.

Those oxides precipitate into your (our) water heater and are the cause of that milky look when we drain and flush. They also flow out of our faucets, but are usually diluted to a point that they are not noticed.

Your water heater should have one, or more, check valves to prevent water heater contents from back flowing into your potable water tank. So, no worries there.

I have all the respect in the world for our fellow forum members, many of whom have provided us with sound, slap your forehead advice, and follow the RVGeeks on YouTube, but I am of a different, decidedly minority view on this subject. Similar to Galileo! This knuckle-dragging old Main Space Engineer would offer clarification by way of the American Galvanizers Association https://galvanizeit.com and their galvanic reactivity chart.

We have an OEM aluminum clad Atwood WH. We have always maintained it with a magnesium anode. 16 years on, camera inspection shows it is still sound. (Although we did replace both check valves.) We followed the same regimen on both our Catalina sloops.

Fair Winds and Following Seas
__________________
Terry & Rosalina
2007 Winnebago Journey 34SE
Retired Navy Mustang & Navy Wife
Oldchinahand is offline   Reply With Quote
Old 02-11-2024, 01:40 PM   #6
V29
Winnebago Camper
 
Join Date: Jan 2024
Posts: 18
Quote:
Originally Posted by Oldchinahand View Post
V29, in response to your specific question, that white crusty material is an assortment of compounds formed as the anode oxidizes. To work, an anode must be higher on the galvanic scale than the material it is protecting. i.e., typically magnesium or aluminum to protect steel, or magnesium to protect aluminum.

Those oxides precipitate into your (our) water heater and are the cause of that milky look when we drain and flush. They also flow out of our faucets, but are usually diluted to a point that they are not noticed.

Your water heater should have one, or more, check valves to prevent water heater contents from back flowing into your potable water tank. So, no worries there.

I have all the respect in the world for our fellow forum members, many of whom have provided us with sound, slap your forehead advice, and follow the RVGeeks on YouTube, but I am of a different, decidedly minority view on this subject. Similar to Galileo! This knuckle-dragging old Main Space Engineer would offer clarification by way of the American Galvanizers Association https://galvanizeit.com and their galvanic reactivity chart.

We have an OEM aluminum clad Atwood WH. We have always maintained it with a magnesium anode. 16 years on, camera inspection shows it is still sound. (Although we did replace both check valves.) We followed the same regimen on both our Catalina sloops.

Fair Winds and Following Seas
As I have mentioned a few times (already), I am extremely knowledgeable re galvanic corrosion and "invented" and told other manufacturers how to improve their zinc life by correctly isolating the connection point enabling the entire anode to wear evenly. If you look at the images I'm providing (Marine Environment), you will not see any "white", just slow erosion of the anode.

I have not invested the time necessary to determine of it is the difference between using Magnesium or Aluminum vs Zinc that cause the white "condensation". No big deal as long as it is normal operation. Thanks all; case Closed.
Attached Images
     
V29 is offline   Reply With Quote
Old 02-16-2024, 04:18 AM   #7
Dream Big, Work Smart !
 
The Raptor's Avatar
 
Join Date: Sep 2023
Posts: 32
Is the Water heater Anode commonly for when Using AC Voltage or AC & LPG Usage ?
__________________
💜🇦🇺 Australian 2003, Isuzu WinnebagoAlpine (model 2105).
Power: 12v, 240V 1500W 65A Inverter, +4.2kWh Silenced 68dB Generator.
The Raptor is offline   Reply With Quote
Old 02-16-2024, 10:22 AM   #8
V29
Winnebago Camper
 
Join Date: Jan 2024
Posts: 18
Quote:
Originally Posted by The Raptor View Post
Is the Water heater Anode commonly for when Using AC Voltage or AC & LPG Usage ?
Just like your home, boat, RV, Trailer, .... whether you use it or not, any time water is in contact with metal, electrolysis occurs. By having (anode) a less noble metal there, it gets attacked first vs the heater's metal.
V29 is offline   Reply With Quote
Old 02-16-2024, 02:29 PM   #9
Dream Big, Work Smart !
 
The Raptor's Avatar
 
Join Date: Sep 2023
Posts: 32
Quote:
Originally Posted by V29 View Post
Just like your home, boat, RV, Trailer, .... whether you use it or not, any time water is in contact with metal, electrolysis occurs. By having (anode) a less noble metal there, it gets attacked first vs the heater's metal.

Even though Copper Water hearers are a Rarity.

I wonder if Copper Tank would be effected ?

But then I suppose you have the Heating element to consider.
__________________
💜🇦🇺 Australian 2003, Isuzu WinnebagoAlpine (model 2105).
Power: 12v, 240V 1500W 65A Inverter, +4.2kWh Silenced 68dB Generator.
The Raptor is offline   Reply With Quote
Old 02-16-2024, 04:44 PM   #10
V29
Winnebago Camper
 
Join Date: Jan 2024
Posts: 18
Quote:
Originally Posted by The Raptor View Post
Even though Copper Water hearers are a Rarity.

I wonder if Copper Tank would be effected ? ONLY if it could hear it - lol.

But then I suppose you have the Heating element to consider.
When two metals are submerged in an electrolyte, while also electrically connected by some external conductor, the less noble (base) will experience galvanic corrosion

The table on the left side is the Galvanic series. You can see Graphite which is essentially carbon and a nonmetal at the top. Next comes platinum, then Ni-Cr-Mo alloy, and below this is titanium. SS 316 is much below in the Galvanic series. In any bimetal contact between SS 316 and Ti, since Ti is nobler than SS 316, SS 316 would get corroded.

Zinc is at the bottom. Zinc is the least noble metal. The less noble metal is the one with a lower (that is, more negative) electrode potential than the nobler one, and will function as the anode and will corrode.
Attached Thumbnails
Click image for larger version

Name:	galv series.jpg
Views:	7
Size:	122.4 KB
ID:	188367  
V29 is offline   Reply With Quote
Old 02-16-2024, 04:59 PM   #11
Dream Big, Work Smart !
 
The Raptor's Avatar
 
Join Date: Sep 2023
Posts: 32
Quote:
Originally Posted by V29 View Post
When two metals are submerged in an electrolyte, while also electrically connected by some external conductor, the less noble (base) will experience galvanic corrosion

You can see Graphite which is essentially carbon and a non-metal at the top.
A great document Thanks !

That was a Great Video on How to Clean the Water Tank, that will be one of my next Maintenance Jobs.

I actually have a customer that works on Submarines, we were talking about Energy Storage (Batteries), he was telling me about Graphite that Welds/Fuses to Copper I recall in some Electronic situations, as the Sub is submerged in Salt Water, it acts like a floating Battery ...or words to that effect.
__________________
💜🇦🇺 Australian 2003, Isuzu WinnebagoAlpine (model 2105).
Power: 12v, 240V 1500W 65A Inverter, +4.2kWh Silenced 68dB Generator.
The Raptor is offline   Reply With Quote
Reply

Tags
heater, water heater, water, heat


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
Water heater anode rod CrispyBones Plumbing | Systems and Fixtures 16 01-13-2023 10:10 AM
For Sale: Camco RV Water Heater 4.5 In Anode Rod bigbertha Parking, Parts & Accessories For Sale & Wanted 0 08-13-2022 07:04 PM
Anode water heater replacement issue help Wyatt General Maintenance and Repair 9 03-08-2020 07:30 PM
anode rod on hot water heater? homeless Plumbing | Systems and Fixtures 10 08-02-2015 07:19 PM
Anode Rod LKANER Plumbing | Systems and Fixtures 8 03-16-2011 10:04 AM

» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 04:56 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.