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05-18-2021, 09:35 AM
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#1
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Senior Member
Join Date: Sep 2016
Location: WI
Posts: 324
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Quick question on water heater
We camp often, but when gone for a couple of days the water heater develops that sulfur smell when returning. We shut off the CG water supply when leaving and shut off the gas to the water heater. Wondering IF it is OK to leave the water heater running on the gas when the CG water supply is shut off (for a couple of days).
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Sierra Destination Camper - 2017 401 FLX
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05-18-2021, 06:19 PM
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#2
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Site Team
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 9,850
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Since you're getting a sulfur odor you may want to change the anode rod (providing it has one) from a magnesium one to an aluminum one. I don't think leaving the heater on will help.
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Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
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05-18-2021, 06:41 PM
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#3
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Senior Member
Join Date: Jan 2020
Posts: 4,866
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I agree with the previous reply, the problem is more likely the stagnant water rather than the temperature of the water. In fact, heating the stagnant water for 2 days may even make the problem worse.
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05-18-2021, 06:46 PM
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#4
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Senior Member
Join Date: Sep 2016
Location: WI
Posts: 324
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Quote:
Originally Posted by NavyLCDR
I agree with the previous reply, the problem is more likely the stagnant water rather than the temperature of the water. In fact, heating the stagnant water for 2 days may even make the problem worse.
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Except that the anode rod (an aluminum one still in good shape) really does its job when the heater is on ???
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Sierra Destination Camper - 2017 401 FLX
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05-18-2021, 06:51 PM
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#5
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Senior Member
Join Date: Jan 2020
Posts: 4,866
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Quote:
Originally Posted by dcavaiani
Except that the anode rod (still in good shape) really does its job when the heater is on ???
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The anode rod just sits there. It does its job continuously. It provides a sacrificial metal to corrode rather than the metal in the tank corroding.
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05-18-2021, 06:55 PM
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#6
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Senior Member
Join Date: Mar 2014
Location: Mountain Foothills of Southern Alberta
Posts: 2,004
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Do you get the smell only at one certain camp site?
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Boon Docking 99% of the time.
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05-18-2021, 07:02 PM
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#7
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Senior Member
Join Date: Sep 2016
Location: WI
Posts: 324
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Quote:
Originally Posted by boondocking
Do get the smell only at one certain camp site?
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Destination camper permanently parked here. I drain, flush the tank with bleach and it is very fresh for a couple of weeks. Then, seems like just when we come back after 2-3 days away and with the heater shut down, the odor is on its way once again. The cold water from the CG supply is always as fresh as ever.
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Sierra Destination Camper - 2017 401 FLX
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05-18-2021, 07:18 PM
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#8
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Senior Member
Join Date: Jan 2020
Posts: 4,866
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There is bacteria in the water reacting with the anode rod.
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05-18-2021, 07:59 PM
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#9
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Senior Member
Join Date: Mar 2014
Location: Mountain Foothills of Southern Alberta
Posts: 2,004
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Quote:
Originally Posted by dcavaiani
We camp often, but when gone for a couple of days the water heater develops that sulfur smell when returning. We shut off the CG water supply when leaving and shut off the gas to the water heater. Wondering IF it is OK to leave the water heater running on the gas when the CG water supply is shut off (for a couple of days).
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You have an aluminum rod and have bleached the water heater so there has to be sulfur reducing bacteria in the campsite water.
You could try leaving the water heater on. I don't think that will help, but is worth a try. Turn the water supply off at your trailer.
Leaving the water sit for a couple of days allows the bacteria to flourish, causing the smell.
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2007 Surveyor SV230 - 200 Watts Solar/MPPT Controller - 220 AH Battery Bank (Two-GC2) - 600 watt PSW Inverter - (2) 2000 watt Inverter Generators - LED Lighting
2009 F150 - 5.4 Litre with Tow Package
Boon Docking 99% of the time.
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05-18-2021, 08:46 PM
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#10
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Senior Member
Join Date: Aug 2015
Location: Box elder
Posts: 728
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One way to prevent the hydrogen sulfide smell is to use a zinc or aluminum-zinc alloy anode rod.
The reason is that zinc doesn’t react the same way with bacteria as magnesium or aluminum (by itself). Using zinc will reduce the chances of you getting hydrogen sulfide in your water heater.
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2015 silverback 31IK
2023 f350
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05-19-2021, 12:02 PM
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#11
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Senior Member
Join Date: Sep 2016
Location: WI
Posts: 324
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Quote:
Originally Posted by kcmusa
One way to prevent the hydrogen sulfide smell is to use a zinc or aluminum-zinc alloy anode rod.
The reason is that zinc doesn’t react the same way with bacteria as magnesium or aluminum (by itself). Using zinc will reduce the chances of you getting hydrogen sulfide in your water heater.
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Thanks, I ordered these: Rv Heater Anode Rod 2 Pack Eau Aluminum/Zinc Rv Hot Water Tank Anode Rod Suburban and Morflo - 9.25''Long & 3/4'' Thread - Long Lasting Tank Corrosion Protection
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Sierra Destination Camper - 2017 401 FLX
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05-19-2021, 12:06 PM
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#12
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Senior Member
Join Date: Jan 2020
Posts: 4,866
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That should help.
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05-19-2021, 02:19 PM
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#13
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Senior Member
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 9,585
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We also have a destination trailer, permanently sited. We usually are there at least every other week in non-freezing weather. Fortunately our water is always fresh--never have the sulfur problem.
But let me ask one thing: Why not simply bypass and drain the heater each time you leave? It only takes a few minutes to do this on leaving, and to refill it on arrival.
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Larry
"Everybody's RV is not like your RV."
"Always take pictures with the button on the right."
"Always bypass the water heater before opening the low-point drains."
Sticks and Bricks: Raleigh, NC
2008 Cherokee 38P: at Ivor, VA permanently
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05-19-2021, 02:25 PM
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#14
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Senior Member
Join Date: Sep 2013
Location: West Des Moines, IA
Posts: 546
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Had that issue a few times. I would drain and flush the heater tank for a quick fix. For a longer lasting solution, I flushed with some chlorine in the water. Now I switch bypass valves to normal before sanitizing when I dewinterize.
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05-19-2021, 02:30 PM
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#15
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Senior Member
Join Date: Sep 2016
Location: WI
Posts: 324
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Quote:
Originally Posted by Larry-NC
We also have a destination trailer, permanently sited. We usually are there at least every other week in non-freezing weather. Fortunately our water is always fresh--never have the sulfur problem.
But let me ask one thing: Why not simply bypass and drain the heater each time you leave? It only takes a few minutes to do this on leaving, and to refill it on arrival.
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That would not be that difficult, except we are only gone for 1-2 nights at most.
__________________
Sierra Destination Camper - 2017 401 FLX
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05-19-2021, 04:35 PM
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#16
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Trailer Park Supervisor
Join Date: Sep 2018
Location: Northern NJ
Posts: 8,592
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I would try another bleach soak first. Let it soak in there for the whole 2 days your are gone. If it comes back, then try the new anode.
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2019 Rockwood Geo Pro G19FD w/off road package
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05-19-2021, 11:50 PM
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#17
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Senior Member
Join Date: Jun 2016
Posts: 130
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Sulfur Smell
You might want to try an inline water filter also. We had the same problem at our campground during busy weekends where more people are using the well water(we are docked seasonally). A quick solution might be the
Hydrolife HL-180. Works better than most and lasts the season.
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05-20-2021, 06:04 AM
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#18
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Senior Member
Join Date: Jul 2015
Posts: 7,053
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Quote:
Originally Posted by SLU2
A quick solution might be the
Hydrolife HL-180. Works better than most and lasts the season.
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This filter contains activated carbon which is generally good if your water source is a public one, but if your source is well water or any other water that contains no chlorine, it is not a good idea, especially when it will be outside and subject to the sun and heat. Activated carbon/charcoal is a breeding ground for bacteria, so it can actually make the water smell worse due to the increase in bacteria. Many, if not most of the campgrounds I have been to use well water as their source.
I sell and install water treatment systems, just like many other plumbers, and we all know to not sell or install a system that incorporates activated carbon/charcoal on a well system.
EDIT: I will add that sometimes, in a residential setting with well water, a carbon system can be used for certain contaminants if necessary, but it requires the installation/use of a UV light system after the carbon to kill the bacteria created by the carbon. UV systems are expensive and very fragile and would very likely not stand-up to the abuse they would take in an RV. The bulb must be replaced annually and usually the glass sleeve that separates the bulb from the water must be replaced at the same time, but not always.
Bruce
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2016 Rockwood Windjammer 3029W Diamond Edition
2015 Chevy 3500HD LTZ 6.0 Crew Cab 4x4 Long Bed 4.10:1 SRW
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05-20-2021, 06:22 AM
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#19
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Senior Member
Join Date: Sep 2012
Location: Virginia
Posts: 9,904
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Usually the sulfur smell is due to the campground water reacting in the water heater. The others have good ideas but the smell will probably be back if you camp often at the same places.
I do have to say we have had 5 campers over 35 years and never had the issue.
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Lillie Spoiled Rotten Boxer Mix
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05-20-2021, 06:31 AM
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#20
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Georgia Rally Coordinator
Join Date: Jun 2015
Location: GA
Posts: 24,474
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Quote:
Originally Posted by Oaklevel
Usually the sulfur smell is due to the campground water reacting in the water heater. The others have good ideas but the smell will probably be back if you camp often at the same places.
I do have to say we have had 5 campers over 35 years and never had the issue.
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X 2 and I do drain mine after every trip. Later RJD
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