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10-16-2019, 12:26 PM
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#1
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Member
Join Date: Feb 2011
Posts: 44
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Rusty anode rod threads
Couldn't find where to ask a new question, so here goes. How do you handle the constant rusting of the threads on the water heater, threads were rusty the even on the day of delivery on new trailer. Was hoping we would get one that didn't need an anode rod or at least to have the design updated so access to it wasn't such a pain in the butt! Seriously suburban make some changes!
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10-16-2019, 12:48 PM
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#2
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Senior Member
Join Date: Jan 2019
Location: Reno, NV
Posts: 1,713
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I just pulled out my Suburban anode rod during my winterization.
I didn't notice any obvious thread corrosion and it came out easily with a 1" 1/16" socket.
But I will put a dab of anti-seize on the threads the next time I remove it.
The rod is designed to sacrifice itself so it is in a hostile environment at the bottom of the WH.
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2018 Ram 2500 Tradesman, CTD/CC/SB/4X4/Equalizer WDH
2019 Forest River Surveyor Legend 19BHLE
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10-16-2019, 12:52 PM
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#3
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Site Team
Join Date: Mar 2014
Location: Grayson County, Texas
Posts: 21,558
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This always causes a "my dog's faster than your dog" debate... but I use a couple of wraps of white Teflon tape on my threads. I probably wouldn't eat off them but they are not too rough to start and to screw into place.
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2015 FR Wildcat 295RSX / GMC Sierra
Nights Camped: '13 = 49/'14 = 74/'15 = 74/'16 = 85/'17 = 110/'18 = 111/'19 = 86/'20 =108/'21 = 115/'22 = 135/'23 = 78; Booked for 2024 = 69
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10-16-2019, 12:55 PM
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#4
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Pickin', Campin', Mason
Join Date: Aug 2015
Location: South Western PA
Posts: 19,142
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Surface rust on the threads of the anode rod and the bung port the rod screws into, pose no threat of damage to either.
I wire brush both when cleaning/inspecting and do the same the next time.
You'll notice the anode rod eats away quicker near the threads... it's because it is protecting the mass of steel that is the threaded plug and the bung.
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2022 Cedar Creek 345IK 5th Wheel•Solar & Inverter•2024 Ford F-Series SCREW•7.3L•4x4•Factory Puck•B&W Companion•TST Tire Monitor w/Repeater•Sinemate 3500w Gen.
F&AM Lodge 358 Somerset, PA - JAFFA Shrine - Altoona, PA
Days Camped ☼ '19=118 ☼ '20=116 ☼ '21=123 ☼ '22=134 ☼ '23=118☼ '24=90
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10-16-2019, 01:00 PM
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#5
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Part-Time Campground Host
Join Date: Jul 2019
Location: Upstate NY
Posts: 3,186
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I use one of these to clean the threads each time I remove the anode. It's called a "plumber's brush". Any hardware store will have them.
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Craig & Cath
2018 2902WS Rockwood Ultra Lite (with tons of Mods)
2022 F250 Lariat Super Cab, 7.3 gas w/10 Spd Xmsn
Equalizer Hitch w/4-Point Sway Control
Days camped since 2015(retirement): 1680
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10-16-2019, 01:04 PM
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#6
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Senior Member
Join Date: Jul 2015
Location: Texas Coastal Bend
Posts: 844
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It's important not to insulate the threads on the rod from the hole in the tank. The sacrificial process requires the flow of electricity between the tank liner and the anode (that's right, your water heater is a battery of sorts). Too much sealant tape can block this weak current and defeat the purpose.
I prefer to use a type of pipe dope that is sold like a thick crayon. You just scrape some all around the threads of the anode then screw it in snugly. The waxy dope prevents leaks without isolating the connection, and I never had trouble taking the rod back out later.
Works for me...just my $.02.
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10-16-2019, 01:12 PM
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#7
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,333
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Quote:
Originally Posted by DavidBo
It's important not to insulate the threads on the rod from the hole in the tank. The sacrificial process requires the flow of electricity between the tank liner and the anode (that's right, your water heater is a battery of sorts). Too much sealant tape can block this weak current and defeat the purpose.
I prefer to use a type of pipe dope that is sold like a thick crayon. You just scrape some all around the threads of the anode then screw it in snugly. The waxy dope prevents leaks without isolating the connection, and I never had trouble taking the rod back out later.
Works for me...just my $.02.
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I wouldn't worry too much about teflon tape insulating the plug from the tank. Threads are sharp and cut through the tape. Tape is then forced into voids that keep it from leaking. If one took an Ohm Meter and checked resistance between plug and tank it would probably read Zero.
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"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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10-16-2019, 01:12 PM
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#8
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Senior Member
Join Date: Sep 2019
Location: LaGrange Ga
Posts: 450
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I read somewhere that when you pull it out to clean the threads with a small wire brush and put a little mineral oil on them.
Mike
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Mike Gray
Forest River Wildwood
2017 27 RKSS
2015 Sierra SLE 5.3 V8 4x4
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10-16-2019, 01:16 PM
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#9
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Site Team
Join Date: Mar 2014
Location: Grayson County, Texas
Posts: 21,558
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Quote:
Originally Posted by TitanMike
I wouldn't worry too much about teflon tape insulating the plug from the tank. Threads are sharp and cut through the tape. Tape is then forced into voids that keep it from leaking. If one took an Ohm Meter and checked resistance between plug and tank it would probably read Zero.
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Yes.... this ^^^^.
Every time I pull an anode rod, I can see where threads have cut through the tape and made a solid connection.
__________________
2015 FR Wildcat 295RSX / GMC Sierra
Nights Camped: '13 = 49/'14 = 74/'15 = 74/'16 = 85/'17 = 110/'18 = 111/'19 = 86/'20 =108/'21 = 115/'22 = 135/'23 = 78; Booked for 2024 = 69
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10-16-2019, 01:17 PM
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#10
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Senior Member
Join Date: Jul 2015
Location: Texas Coastal Bend
Posts: 844
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Quote:
Originally Posted by TitanMike
I wouldn't worry too much about teflon tape insulating the plug from the tank. Threads are sharp and cut through the tape. Tape is then forced into voids that keep it from leaking. If one took an Ohm Meter and checked resistance between plug and tank it would probably read Zero.
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If properly applied that is correct, but I've seen folks put wrap after wrap of tape on a fitting, probably in an attempt to stop a leak. That could cause an issue, especially considering the millivolts of power we're talking about.
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10-16-2019, 01:22 PM
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#11
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Site Team
Join Date: Mar 2014
Location: Grayson County, Texas
Posts: 21,558
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Quote:
Originally Posted by DavidBo
If properly applied that is correct, but I've seen folks put wrap after wrap of tape on a fitting, probably in an attempt to stop a leak. That could cause an issue, especially considering the millivolts of power we're talking about.
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There are also multiple incorrect ways to apply and incorrect chemical make-ups of various dopes which can be applied... all of which can cause problems. That's why I wrote "a couple of wraps of white Teflon tape".
__________________
2015 FR Wildcat 295RSX / GMC Sierra
Nights Camped: '13 = 49/'14 = 74/'15 = 74/'16 = 85/'17 = 110/'18 = 111/'19 = 86/'20 =108/'21 = 115/'22 = 135/'23 = 78; Booked for 2024 = 69
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10-16-2019, 02:27 PM
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#12
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Senior Member
Join Date: Aug 2016
Location: Worthington, MN
Posts: 230
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I use a wire wheel on my Dremel, then flush it vert well. A little Teflon tape and I’m good to go.
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Bnrc73
2010 Montana 3400RL
Worthington MN
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10-16-2019, 02:29 PM
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#13
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ARLO
Join Date: Oct 2008
Location: N Chili, NY
Posts: 910
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After 10 years, it is more than just a little bit of surface rust. I bought a 3/4 NPT Tap to clean out the threads but be very careful.
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10-16-2019, 02:32 PM
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#14
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CharlieP
Join Date: Mar 2013
Location: Western Mass
Posts: 13
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Also consider that when there is water in the tank, water is a great conductor. The anode is not isolated from the tank.
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CharlieP
2018 Silverado 1500 Z71
2018 WS24 Roo
2018 upgrade from Popup
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10-16-2019, 02:38 PM
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#15
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Senior Member
Join Date: Sep 2016
Location: ALASKA (World's Biggest Campground)
Posts: 6,720
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Don't know as if I would use an anti seize compound on the threads. For the most part that stuff contains heavy metals. Don't want that coming into contact with a potable water source.
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'07 K3500 Silverado LT Crew Duramax (LBZ)
2016 Salem 27RKSS
1984 CHEV SCOTTSDALE K20 2GCGK24J0E1XXXXXX (Chevrolet Legends-Class of 2019)
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10-16-2019, 03:29 PM
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#16
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Trailer Park Supervisor
Join Date: Sep 2018
Location: Northern NJ
Posts: 8,580
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Could always use a light coating of petroleum jelly, won't hurt you and won't impede any galvanic activity.
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2019 Rockwood Geo Pro G19FD w/off road package
2015 Ford F150 XLT Super Cab 4x4 V8
Yes, I drink the water!
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10-16-2019, 05:25 PM
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#17
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Senior Senior Member
Join Date: Jul 2015
Posts: 288
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While we're talking anodes...
Is there a good reason not to put the anode rod back in the WH after winterizing is complete? In the past I have screwed in a plastic 3/4 inch plug over the winter and now I can not find it. So?
TIA for your ideas and sorry for the hijack
BTW I use a 3/4" tap to remove sludge and rust.
Mike
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2015 Flagstaff Super V 26VFKSS Emerald... SOLD
Now camping with a new SOB Winnebago pulled by a 2021 Ford Ranger.
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10-16-2019, 06:01 PM
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#18
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Junior Member
Join Date: Jun 2019
Posts: 6
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Surburan water hearter
Quote:
Originally Posted by dwolff
Couldn't find where to ask a new question, so here goes. How do you handle the constant rusting of the threads on the water heater, threads were rusty the even on the day of delivery on new trailer. Was hoping we would get one that didn't need an anode rod or at least to have the design updated so access to it wasn't such a pain in the butt! Seriously suburban make some changes!
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Don't worry about a little rust. The Suburban water heater is steel and is stronger than Atwood. Don't complain, you have a much better water heater. Just put Teflon tape on the threads and put it back in when you go camping. Steel tank does require an anode rod but is easy to deal with. Drain your tank after camping if you are not going to use it for 3 or 4 weeks and winterizing. Enjoy camping. Life is good. BSMillers
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10-16-2019, 06:04 PM
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#19
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Member
Join Date: Feb 2014
Posts: 46
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Find someone who has a 3/4 pipe tap, put a little lubricant on tap and chase the threads. My heater did same thing because it's iron threads. Used tap now rod goes right in no problem.
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10-16-2019, 06:26 PM
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#20
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,333
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Quote:
Originally Posted by raytwntrvlr
Is there a good reason not to put the anode rod back in the WH after winterizing is complete? In the past I have screwed in a plastic 3/4 inch plug over the winter and now I can not find it. So?
TIA for your ideas and sorry for the hijack
BTW I use a 3/4" tap to remove sludge and rust.
Mike
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Only reason I'd put the anode back in after winterizing is so I don't forget to in the spring. Maybe to keep any bugs looking for a winter home out too.
__________________
"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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