Thread Tools Display Modes
Old 06-05-2014, 06:41 AM   #11
Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 23,898
Originally Posted by youroo View Post
It is possible to have water at (Hot?) outlets while the (Tank is empty! It is possible to have (Water) in the (Tank) but NO flow thru the tank! A empty tank will not hurt the (Anode)! The (Bypass Valves) must be oriented correctly for proper Flow. There are many Pics. in Search of this! Youroo!!
I know op said anode, but I think he meant elec. heating element. Noob error.

OldCoot is online now   Reply With Quote
Old 06-05-2014, 06:45 AM   #12
Site Team
wmtire's Avatar
Join Date: Nov 2010
Location: Northeast Louisiana
Posts: 11,059
Originally Posted by f1100turbo View Post
Turning on the hot water Tap may be a false indication that there's water in the tank.
Here's a pic.

I open this while filling tank to bleed air and make sure it's full.


"Sabre owners united"
It looks like you've gotten a lot of good advice from experienced members here.

+4. If the bypass valve (which ties the cold water line into the hot water line) has been set for winter mode, or is WILL get water out of the tap when turning the hot water tap on....but it's coming from the cold water line and not the heater tank. This is a false indication of there being water in the heater itself.

Also, if you do turn on the electrical heating ELEMENT, when there is no water inside the heater, it will burn itself out. I think you confused the term and said anode. The anode rod is a different animal, and is a rod that goes inside Suburban brand water heaters, that keeps the tank from rusting out.

Once you gain experience and know for sure all about the bypass valves and such, you probably can just turn on the hot water tap to see if water comes out as an indication of there being water inside the heater. BUT the only 100% sure way, and safe practice technique, is to do as Turbs pointed out.

I do need to add, that you must be hooked up to either a city water supply, or have a pump pressurized system in order for water to come out of the pressure relief valve as KyDan pointed out.. If you just walked out to your camper and opened the pressure relief, with no form of pressure going to the water heater, you probably wouldn't get much water to come out, even if the heater tank is full. The pressure relief valve is at the TOP of the tank, so without pressure, gravity will work against you.... and not push water out the valve.

2011 Flagstaff 831 RLBSS

I've just ordered a chicken and an egg from Amazon.... I will keep you posted.
wmtire is online now   Reply With Quote
Old 06-05-2014, 06:50 AM   #13
Senior Member
Ford Idaho's Avatar
Join Date: Sep 2013
Location: Idaho
Posts: 9,037
Originally Posted by f1100turbo View Post
The only true way is to open the relief valve on the water heater.
The bypass valve handle has been known to turn but the actual valve inside doesn't.


"Sabre owners united"

I use the PR valve as well would not want to replace any elements right now.
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
Ford Idaho is offline   Reply With Quote
Old 06-05-2014, 10:15 AM   #14
Senior Member
thestrangebrew's Avatar
Join Date: Apr 2014
Posts: 297
Thanks everyone! Sorry for the wrong terminology! I'll use the PR valve when hooked up to make sure it's full before I run it. It took me awhile to find the bypass valve last night. Finally found it between the front bunk and sofa, behind the water heater, but also behind a false wall that had 3 screws. You guys have been great!
2014 F-150 SCREW Ecoboost 4x4.

2014 Rockwood Roo 233s GVWR #6402
thestrangebrew is offline   Reply With Quote
Old 06-05-2014, 06:33 PM   #15
Senior Member
Join Date: Jun 2012
Posts: 3,779
Another option is to run it on propane until your sure you've got hot water, then turn on the electric.
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
rockfordroo is offline   Reply With Quote
Old 06-05-2014, 06:40 PM   #16
Senior Member
crunchman12001's Avatar
Join Date: Feb 2013
Location: Chagrin Falls, Ohio
Posts: 1,378
Originally Posted by OldCoot View Post
X2 FT Turbs.
2011 Coachman Freedom Express 295RLDS- Sold
2015 F-250 FX4 SUPER DUTY 6.2L Gas 4WD SuperCab XL 3.73 rear / 158" WB / 8' bed. Factory anti-sway and brake controller
crunchman12001 is offline   Reply With Quote
Old 06-05-2014, 07:04 PM   #17
Cyber Phrenologist
Radio's Avatar
Join Date: Jun 2007
Location: Fayetteville, GA
Posts: 1,606
This thread:

Electric to gas water heaters?

has a lot of discussion about the water heater controls and valves on the outside of the trailer. You will want to open the overpressure valve and leave it open until the water heater fills up. It's faster this way, and more certain, that opening a faucet inside the trailer, plus you don't fill up your galley/grey tanks.

Here's a pic of a typical water heater:
Attached Images
Admin at, part of the Social Knowledge network.
"RVing and Amateur Radio served up on the same plate"
2008 (or is it 2009?) Rockwood 8280SS - 2007 F-150
Lot's of mostly Kenwood radios

Radio is offline   Reply With Quote
Old 06-06-2014, 05:21 PM   #18
Senior Member
Join Date: Apr 2008
Location: West Valley City, Utah
Posts: 277
Just a hint on your 233S. The easiest way I've found to get to the water heater valves is to roll the sofa back over & put the leg down. You can then lift up on the sofa bottom & it will lift up. Three ways to get into that storage compartment, outside, inside & by lifting the sofa bottom. You can then see down & reach the HW valves easily.
2001 Chevy Silverado
2011 Rockwood Roo 233S
rbq is online now   Reply With Quote
Old 06-06-2014, 06:18 PM   #19
Site Team - Lou
Herk7769's Avatar
Join Date: Oct 2009
Location: South Eastern PA
Posts: 19,831
Originally Posted by rockfordroo View Post
Another option is to run it on propane until your sure you've got hot water, then turn on the electric.
Trying to run on propane with an empty water heater might save your AC element, but could ruin your thermostats.

Best to pop the pressure relief valve to make sure it has water in it.

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
Herk7769 is online now   Reply With Quote
Old 06-06-2014, 08:37 PM   #20
Senior Member
caper's Avatar
Join Date: Jul 2010
Posts: 1,971
Also running the HW tank on propane with no water inside can cause some damage to the tank. I am the second owner of the TT and had to replace the water heater last week (water leaking into trailer). Upon further inspection I noticed that the tank was not welded properly around the PR valve and must have been leaking since day one (minor leak and not noticed inside TT). The water was trapped between the steel tank and the foam insulation. Plus the foam was burnt and burn marks on the bottom of the tank. Looked as if the tank was turned on with no water in it.

Terry and Janet
2008 3001W Windjammer
2007 Ford F150
caper is offline   Reply With Quote

2014, 233, 233s, heater, water, water heater

Thread Tools
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

» Virginia Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 08:35 AM.