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12-16-2016, 02:11 PM
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#1
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LSA pilot
Join Date: Nov 2012
Location: Georgetown, SC
Posts: 27
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Pressure in water heater
For the 6th year straight of draining my water heater by removing my sacrificial anode bottom plug for the winter it came out with lots of pressure for the first time ever. Last used early Sept. 2016 with city water and sitting in shed since, mid Dec.. Both water heaters were off as well as pump, checked twice. Couldn't locate mysterious disappearing teflon tape for re install after empty so I temporarily tightened hand tight. Bought two more rolls of tape the next day and removed again, not nearly as much, but pressure again.
. Any thoughts appreciated, John in SC
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12-17-2016, 08:10 AM
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#2
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Senior Member
Join Date: Mar 2012
Location: Brookings
Posts: 561
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Open pressure relief valve first.
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12-17-2016, 08:52 AM
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#3
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Be sure the tank has cooled off.
Open a hot water faucet!
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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12-17-2016, 08:57 AM
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#4
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Pickin', Campin', Mason
Join Date: Aug 2015
Location: South Western PA
Posts: 19,143
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Not uncommon for some pressure to be there the first time but what I find unusual is once you removed the anode rod and reinserted finger tight while waiting to get teflon tape, that there was pressure build up again.
Once the tank is empty, there would be nothing but air in the tank to expand.
When you removed the anode/plug the second time was there actually water or just a swish of air?
__________________
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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12-17-2016, 09:22 AM
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#5
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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Quote:
Originally Posted by 5picker
Not uncommon for some pressure to be there the first time but what I find unusual is once you removed the anode rod and reinserted finger tight while waiting to get teflon tape, that there was pressure build up again.
Once the tank is empty, there would be nothing but air in the tank to expand.
When you removed the anode/plug the second time was there actually water or just a swish of air?
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I am in this corner!  Youroo! ! 
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12-17-2016, 09:31 AM
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#6
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Quote:
Originally Posted by youroo
I am in this corner! Youroo! ! |
I just stand to one side, less chance of a ricochet shower....... 
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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12-17-2016, 11:37 AM
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#7
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LSA pilot
Join Date: Nov 2012
Location: Georgetown, SC
Posts: 27
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WH pressure
Quote:
Originally Posted by 5picker
Not uncommon for some pressure to be there the first time but what I find unusual is once you removed the anode rod and reinserted finger tight while waiting to get teflon tape, that there was pressure build up again.
Once the tank is empty, there would be nothing but air in the tank to expand.
When you removed the anode/plug the second time was there actually water or just a swish of air?
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A light swish of air.
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12-17-2016, 12:29 PM
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#8
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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Palmettoe,are you sure you have two "water heaters "!  Youroo! !
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12-17-2016, 01:43 PM
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#9
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Site Team
Join Date: Jan 2007
Location: Goodyear, Arizona
Posts: 33,789
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Quote:
Originally Posted by youroo
Palmettoe,are you sure you have two "water heaters "! Youroo! ! |
Problem is that the OP has a Heartland RV, not a FR product.
So chances are that no one on the Forum, has his RV.
Not familiar with any RV with 2 water heaters unless it has 2 bathrooms.
__________________
Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.) 
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
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12-17-2016, 03:36 PM
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#10
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Senior Member
Join Date: Sep 2014
Location: Western AZ
Posts: 2,404
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biken. I had a Heartland Pioneer. It's just an everyday affordable TT that looks like any other basic TT with the same stuff. i'm pretty sure there are a lot of Thor owners on this site.
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12-17-2016, 05:42 PM
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#11
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Site Team
Join Date: Jan 2007
Location: Goodyear, Arizona
Posts: 33,789
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Quote:
Originally Posted by mike.t
biken. I had a Heartland Pioneer. It's just an everyday affordable TT that looks like any other basic TT with the same stuff. i'm pretty sure there are a lot of Thor owners on this site.
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A basic TT doesn't come with 2 water heaters.
I don't have any problem that it's a SOB, just would like to know what model RV he has, that has two water heaters.
__________________
Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
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12-17-2016, 06:06 PM
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#12
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Senior Member
Join Date: Sep 2014
Location: Western AZ
Posts: 2,404
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Don't think it has two. Never implied a basic had two.
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12-17-2016, 07:30 PM
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#13
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Senior Member
Join Date: Jun 2013
Location: mid Michigam
Posts: 124
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I assume when you say two water heaters you meant gas/electric elements on one unit. That said, original buildup could have been city water pressure not released. If you didn't drain the system, water heater is usually a low point in the system and water back pressure may cause pressure the second time. Other than that I don't have any other thoughts
__________________
2013 Salem Hemisphere 286 RLT
2009 Silverado 2500HD
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12-17-2016, 07:59 PM
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#14
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Senior Member
Join Date: Sep 2014
Location: Western AZ
Posts: 2,404
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Just rereading." Couldn't locate mysterious disappearing teflon tape for re install" ??
Can't use it over.
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12-17-2016, 08:08 PM
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#15
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Senior Member
Join Date: Feb 2015
Location: Southern, IL
Posts: 3,272
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Seems that the OP needs to clear up some comments. Two things that stand out is the missing tape and the second pressure release. Hard to get my mind around the last one.
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Bob & Michelle
2016 Ford F-250 Lariat 4x4
2017 Flagstaff Super Lite 526RLWS
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12-17-2016, 10:31 PM
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#16
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Senior Member
Join Date: Jun 2016
Posts: 5,058
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Quote:
Originally Posted by mike.t
Just rereading." Couldn't locate mysterious disappearing teflon tape for re install" ??
Can't use it over.
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Happens to me a lot, I put a roll of tape in my tool box and when I need it, it isn't there... I swear, I ALWAYS have a roll each of duct, electric, and Teflon. Except when I need to use one and that is the one that is missing. I think Scotty from Star Trec watches me and beams them out. 
Wonder if there was a significant ambient temperature change between the two openings, that could cause a bit of an air swish.
__________________
Al
I am starting to think, that I will never be old enough--------to know better.
Tolerance will reach such a level that intelligent people will be banned from thinking so as not to offend the imbeciles. Fyodor Mikhailovich Dostoevsky, Russian Novelist
S.E. Mich. Flagstaff 26FKWS / 2022 F-150 3.5 EcoBoost SCrew Propride
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12-18-2016, 03:51 AM
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#17
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LSA pilot
Join Date: Nov 2012
Location: Georgetown, SC
Posts: 27
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Pressure in water heater tank
Quote:
Originally Posted by youroo
Palmettoe,are you sure you have two "water heaters "! Youroo! ! |
Water heater elements, one gas and one electric.
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12-18-2016, 03:55 AM
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#18
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LSA pilot
Join Date: Nov 2012
Location: Georgetown, SC
Posts: 27
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water heater
Quote:
Originally Posted by bikendan
A basic TT doesn't come with 2 water heaters.
I don't have any problem that it's a SOB, just would like to know what model RV he has, that has two water heaters.
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Heaters, not tanks
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12-18-2016, 05:01 AM
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#19
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Site Team
Join Date: Nov 2010
Location: Northeast Louisiana
Posts: 33,924
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Quote:
Originally Posted by palmettoe
Water heater elements, one gas and one electric.
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Quote:
Originally Posted by palmettoe
Heaters, not tanks
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Palmettoe, I believe you may possibly be meaning two heating "sources" which one is propane gas and the other is the electric heating element.
You only have ONE element, which is the 120 volt AC electric heating element inside the water heater tank......and you also have a propane burner, which heats up the same tank from the outside of it.
It's all considered ONE water heater, with two heating sources (the electric element inside the tank, and the propane burner outside the tank). It's just your terminology that may be confusing to others. They call this type of water heater a "combination gas/electric water heater".
http://www.airxcel.com/suburban/prod...n-gas-electric
An easy way to think of your combination gas/electric water heater is to put a pot of water on a gas stove. Now if you turn on the gas burner underneath the pot(tank), this is your how your RV water heater uses propane to heat the water.
Now for our purpose. imagine you had an electric space heater that was waterproof, that you could drop down into the same pot to heat the water. This is your electric heating element in your RV water heater.
You could just use the gas stove to heat the pot, or you could turn the gas off and just use the immersed electric space heater to heat the water....or you could use the gas burner with the electric space heater at the same time and heat the water the fastest way.
__________________
 2011 Flagstaff 831 RLBSS
A 72 hour hold in a psych unit is beginning to intrigue me as a potential vacation opportunity.
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12-18-2016, 06:47 AM
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#20
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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Quote:
Originally Posted by youroo
Palmettoe,are you sure you have two "water heaters "! Youroo! ! |
Boy I am glad I didn't say "Hot water heater " like a lot of people say, or I would be in "Hot Water"!   Youroo! !
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