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12-12-2011, 02:11 PM
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#1
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Senior Member
Join Date: Nov 2011
Location: Hanover, PA
Posts: 630
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Water Heater pressure relief valve- Ice
This weekend our overnight temps dipped into the low 20's.
I brought the Rogue home Saturday night to be ready for an early start Sunday to head for the game.
I noticed Sunday morning there was some ice on the ground under the water heater. Upon opening the exterior cover to the water heater controls I noticed the water came from the pressure relief valve.
Is this normal? It is my understanding a single overnight in freezing temps should not burst pipes or cause problems in an RV holding water.
It is not winterized because I store the Rogue in a heated warehouse.
This was just a single overnight occurrence.
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2015 Thor ACE EVO30.1
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12-12-2011, 05:22 PM
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#2
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Senior Member
Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
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Just flip the release lever on the valve a couple of times while the system is under pressure to clean the seat and it should seal again. The manual says you should do that and check them on a regular basis.
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Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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12-12-2011, 05:43 PM
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#3
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Senior Member
Join Date: Jul 2011
Posts: 792
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Yup............just burp it.
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2011 Itasca Suncruiser, Jeep Grand Cherokee toad
MSgt retired USAF 1988, AA retired 2005
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12-12-2011, 06:02 PM
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#4
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,948
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Freezing is freezing. You can get frozen pipes and such with one night ...depends on how low and for how long below freezing. I hope you did not damage anything with this "understanding".
In the low 20's is generally time to drain pipe and winterize.
Ken
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Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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12-12-2011, 07:23 PM
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#5
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Senior Member
Join Date: Nov 2011
Location: Hanover, PA
Posts: 630
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Would hate to winterize it for essentially one game.
Well unless Baltimore hosts a playoff game.
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2015 Thor ACE EVO30.1
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12-13-2011, 05:10 AM
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#6
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Senior Member
Join Date: Nov 2011
Location: Hanover, PA
Posts: 630
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Quote:
Originally Posted by toneumanns
Yup............just burp it.
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What does this help accomplish?
I'm guessing ice came out because the water expanded as it froze. I assume this is better than the pipes bursting.
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2015 Thor ACE EVO30.1
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12-13-2011, 06:12 AM
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#7
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Senior Member
Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
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Eric, was the water heater turned on? How cold was the temperature that night? It is possible that the valve has been leaking all along and the ice was just evidence. These valves do leak and burping them reseats them and fixes it.
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Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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12-13-2011, 06:44 AM
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#8
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Senior Member
Join Date: Nov 2011
Location: Hanover, PA
Posts: 630
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No, I have never turned it on. Meaning, I have never turned either switch on to heat it. It is live though, meaning I do have water traveling through it.
It has never leaked before, I clean behind the cover whenever I wipe down the RV.
It got down into the low 20's that night.
I checked all the pipes that day and used the water and there were no drips on the pavement.
It also sat outside Sunday night after we got back from the game and did the same thing Monday morning.
Sorry for the mundane questions. I was just wondering if this was normal.
Lastly, the only thing we use water for is the toilet and to wash our hands. Is there anything I can pour into the fresh water tank and cycle through the entire system that would keep it from freezing yet still allow us to clean our hands?
I believe the RV anti-freeze is pretty gross and one would not want to clean their hands with it.
We never drink or use the water out of the RV for cooking purposes.
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2015 Thor ACE EVO30.1
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12-13-2011, 06:57 AM
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#9
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,697
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If you are just washing and flushing, I don't see where a little RV antifreeze in the system would hurt. It is not harmful to humans, but it does have a bit of color and taste/odor.
Your understanding that one cold night won't hurt things is incorrect. Several hours in the low 20's is enough to freeze exposed water lines. Next time, turn the water heater on for a few hours in the evening and let it heat the water in the tank - that should keep it above freezing the rest of the night.
If your water tank never dribbled water before, I would guess that it did in fact partially freeze. The PT relief valve may have saved you an expensive repair. Or maybe not.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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12-13-2011, 07:05 AM
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#10
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Member
Join Date: Feb 2011
Location: Gardnerville, Nevada
Posts: 64
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Do not put Rv antifreeze in the water heater and turn the water heater on. It will cause the antifreeze 'flavor' to remain for a long time.
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Retired RV Technician
Travlin the West
Winnebago Outlook, Victory Vision, Silverado 3500, Dog ,Wife ( not in that order)
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12-13-2011, 07:10 AM
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#11
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Senior Member
Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
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I was under the assumption that the water heater was turned on, sorry. I agree with Gary in that if it got into the low 20's then it most likely started to freeze or did freeze and expand. You should buy a bypass for your hot water heater then open it up and drain it. Or get an air fitting and blow out the whole water system with 45 psi air from a compressor. Just open up each faucet until you get nothing but air out of it also flush the toilet a couple of times and open the low point drain under the water pump and let all the water blow out.
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Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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12-13-2011, 08:59 AM
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#12
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Senior Member
Join Date: Nov 2011
Location: Hanover, PA
Posts: 630
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I do have a bypass valve on the water heater. I also have 2 drain lines in my water compartment.
So would shutting off the water from the fresh tank, opening the drain valves on the rest of the system and allowing the water to drain be enough to get me through the night?
Then open the main valve and close the drain valves the day of the game.
Then once I return home that night- fresh water shut off open all valves again.
I know this sounds a bit lazy, but I am merely looking for a single overnight remedy.
Thanks guys.
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12-13-2011, 09:02 AM
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#13
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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The Relief valve is called TPR (Temperature Pressure relief) If it's dripping then one of two conditions exist.. 1: Faulty, 2: High pressure.
High pressure can happen when you do not have enough air in the heater and it fills with very cold water, and is then heated. If you have not drained and flushed the heater in a while .. Do so.. You might want to find a warmer place to do it though.
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Home is where I park it!
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12-13-2011, 09:07 AM
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#14
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Senior Member
Workhorse Chassis Owner
Join Date: Nov 2003
Location: Mesa, AZ USA
Posts: 1,806
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Quote:
Originally Posted by EricGT
This weekend our overnight temps dipped into the low 20's.
I brought the Rogue home Saturday night to be ready for an early start Sunday to head for the game.
I noticed Sunday morning there was some ice on the ground under the water heater. Upon opening the exterior cover to the water heater controls I noticed the water came from the pressure relief valve.
Is this normal? It is my understanding a single overnight in freezing temps should not burst pipes or cause problems in an RV holding water.
It is not winterized because I store the Rogue in a heated warehouse.
This was just a single overnight occurrence.
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The water is coming from a leaky relief valve seat. The water that is on the ground is in a colder environment that any of your plumbing. As suggested above, quickly flip the valve to clean it and go merrily on your way.
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Wretched excess is just barely enough.
2002 Itasca Suncruiser - WH Chassis - 35U - 2006 Jeep Liberty
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