Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > TRAVEL TRAILER, 5th WHEEL & TRUCK CAMPER FORUMS > Travel Trailer Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 07-01-2022, 11:41 AM   #1
Junior Member
Join Date: Jul 2022
Posts: 2
Fresh water tank sagging

Hello all,

Iím new to this forum and was hoping to her your expert opinions/suggestions on how best to solve this issue with our Autumn Ridge 24 BHU. We believe the pressure inside the fresh water tank was too high and caused the sagging of the fresh water tank, as well as the support structures. We believe we have solved the issue of how it happened and fixed it, however we are now wondering how best to solve the damage that was done to the tank and support beams.

Attached pictures of the damage.
Attached Thumbnails
Click image for larger version

Name:	EFAA1FF4-92DB-4D29-B1CB-103E9B5868E0.jpg
Views:	143
Size:	529.5 KB
ID:	369835   Click image for larger version

Name:	A293A1E7-4DD1-4D4E-877F-EA36BF26E07B.jpg
Views:	103
Size:	454.4 KB
ID:	369836  

Lilbird5466 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-01-2022, 12:07 PM   #2
Senior Member
Flyer15015's Avatar
Fleetwood Owners Club
Workhorse Chassis Owner
Join Date: Jun 2016
Location: On the continental divide
Posts: 2,622
First, freshwater tanks are not usually pressurized. It should have an overflow tube.
Second, the "support beams" look like pretty chinsey angle iron.
You should get some real and heavier CHANNEL iron or I beams in there for support.
Third, use more than you have now
And don't forget to put some padding atop the support rails.
I use wash machine dump tubing split with a razor blade.

Mike in Colorado
2004 Fleetwood Pace Arrow 37c, 8.1 gasser, (Jezebel) Ultra RV ECM / TCM, plugs wires, and rear track bar, PPE deep Tx pan w/ temp gage, Bilstein's, Sailun's & Sumo's all round, pushed by a 2002 Grand Caravan, on a Master Tow Dolly OR a WR-250 on a rail.
Flyer15015 is offline   Reply With Quote
Old 07-01-2022, 02:24 PM   #3
Senior Member
Join Date: Jul 2005
Posts: 5,996
Welcome aboard!
Upgrade to 2x3 T-channel with bridging across the middle of the span. Good luck!
TandW is offline   Reply With Quote
Old 07-01-2022, 02:35 PM   #4
Senior Member
Old-Biscuit's Avatar
Join Date: Nov 2015
Posts: 26,843
Weight of water and cheap supports are reason tank is sagging

Additional supports will take care of the sagging

DIY or have a trailer shop fab/install more cross supports before your tank falls out
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
Old-Biscuit is offline   Reply With Quote
Old 07-01-2022, 02:36 PM   #5
Senior Member
Join Date: Dec 2020
Location: Torrington Wyo
Posts: 249
Agree with both previous posts and I would suggest not reusing that tank.
TV-2012 Ram Cummins 3500 Limited SRW, Anderson Ultimate hitch
RV-2008 Elite Attitude 27AK
Toys- 1pr 2013 Polaris 550 ATVs, 2004 Tracker Targa 175 and various canoes and kayaks.
rrsutherland is offline   Reply With Quote
Old 07-01-2022, 03:06 PM   #6
Senior Member
creativepart's Avatar
Winnebago Owners Club
Join Date: Sep 2009
Location: Spring Branch, TX
Posts: 2,987
Travel with less than full tanks until you get that reinforced. It's not unheard of for those things to fall out on the road while driving. A full tank of fresh water weighs just under 500 lbs on that TT.

All the other suggestions are spot on.
2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
creativepart is offline   Reply With Quote
Old 07-01-2022, 08:39 PM   #7
Junior Member
Join Date: Jul 2022
Posts: 2
Do you mean re-inforce the beams or get an entirely new fresh water tank?
Lilbird5466 is offline   Reply With Quote
Old 07-01-2022, 10:16 PM   #8
Senior Member
TB673's Avatar
Join Date: Sep 2018
Location: Headed North to CLE
Posts: 1,054
Originally Posted by Lilbird5466 View Post
Do you mean re-inforce the beams or get an entirely new fresh water tank?

Don't reinforce the Angle Iron that is there, replace with Channel Iron, and replace the tank as it has been structurally compromised. JMHO

2015 Silverado 3500HD CC DRW Duramax
2006 Hitchhiker Champagne
TB673 is offline   Reply With Quote
Old 07-02-2022, 09:14 AM   #9
Senior Member
Join Date: Nov 2018
Location: Beaver Dam, Wisconsin
Posts: 5,152
Ok, here is a dissenting voice.

The bulging plastic looks normal. 500 pounds of water inside a plastic tank is likely to do that. The plastic wall of the tank is not going to look flat after carrying all that water. Tensile strength of the plastic wall keeps the water in.

Cross supports are thin. That is how the designer kept the weight of the trailer down. The same principle has probably been used throughout the TT.

Five years ago there were reports of inadequate tank supports. Tanks came loose and had to be beefed up to work well. That discussion has faded, but the fear is still there.

The design does not look the same as the old Voltage toyhauler tank supports. However, if you want to improve it, then add additional supports and leave the existing supports alone.

The plastic tank wall will still bulge between the supports, but not nearly as much. The existing thin angle supports will be carrying a lot less load and thus are less likely to fail.

Possibility of failure is more likely related to the quality of the cross beam welds or bolts. Check for signs of movement around joints or fatigue cracks next to the welds.

You do not need a new plastic tank.

Trust me I am an internet expert!
Paul Bristol
Kodiak Cub 176RD
Nissan Pathfinder 2015
Persistent is offline   Reply With Quote
Old 07-03-2022, 10:07 AM   #10
Senior Member
Join Date: Apr 2003
Location: Kelowna, B.C. Canada
Posts: 3,085
Remove the weak 1.5" x 1/8" angle and replace with something much stronger. I'd probably use HSS that was 3/16" thick. 2x2 or 2x3
2022 Outdoors RV 25RDS, 2022 F350 dually, 6.7PSD, 10 spd, 3.55's
Dave Pelletier is offline   Reply With Quote
Old 07-03-2022, 12:55 PM   #11
Senior Member
Join Date: Feb 2020
Posts: 720
I am not exactly sure what I am looking at. The tank on the left seems like it is installed correctly, like the type of material and construction I'd expect, and looks fine. The thing on the right supported by the bent up angles seems wrong on many levels. It is not supported the way I'd expect. Normally tanks are edge supported. Cross strapping can help but would not normally be the primary support. Tanks are reinforced at the support points to prevent local failures where load is introduced. The material of the tank looks odd, like it has been greatly over stressed or gotten close to the melting point while loaded. That should not happen in normal use. I am not sure how that could happen. I can think of two ways to over stress a tank, both involve not having a vent. If there was no vent and the check valve in the pump leaked the tank cold reach the pressure of the city water supply. If the fill valve was threaded (not normal) and there was no vent you could reach the city water supply pressure. both of those scenarios could over stress the tank. I the 4 angles carry all the load from a 500 LB tank they might be close to their strength limit if they are a low strength aluminum.
The OP said they think they know how this happened, I'd like to hear that to help understand what might need replacing.
2017 RAM 1500 4x4 5.7 HEMI
Tomahawk is offline   Reply With Quote
Old 07-05-2022, 09:00 PM   #12
Senior Member
CharlesinGA's Avatar
Join Date: Jun 2016
Location: South of Atlanta, Georgia
Posts: 2,145
You can easily "inflate" a water tank and damage the supports by simply shoving the hose in the fill port. It blocks the port to the point that the air cannot escape and the rather small air vent is designed to allow air INTO the tank as you pump water out into the sinks, shower, etc. The vent is not designed to nor will it exhaust enough air to keep the tank from expanding. Use an adapter, either home made from box store parts, or one bought from Camco or the like.

This will air to escape around the small fill tube while the water is running in.

'03 Ram 2500 CTD, 5.9HO six speed PacBrake std cab long bed Leer top and 2008 Bigfoot 25B21RB.. Previously, 2008 Thor Freedom Spirit 180, SOLD! 2007 Winnebago View 23H Motorhome, SOLD!
CharlesinGA is offline   Reply With Quote
Old 07-05-2022, 11:21 PM   #13
Senior Member
Join Date: Feb 2020
Posts: 720
Originally Posted by CharlesinGA View Post
You can easily "inflate" a water tank ...
This will air to escape around the small fill tube while the water is running in.
Good to know. A water hose does not fit in my fill tube anywhere close to tight enough to seal. When I overfill, water just comes gushing out and pushes the hose out. I like the adapter you show because the flex tubing seems much better than what I do now and especially, the shut off built in. That makes it a one man job instead of me holding the hose in place and my wife at the ready at the hose bib to shut off.
2017 RAM 1500 4x4 5.7 HEMI
Tomahawk is offline   Reply With Quote
Old 07-18-2022, 08:48 AM   #14
Senior Member
glwinger's Avatar
Join Date: Nov 2018
Posts: 1,308
This is what I used. Superstrut, 13/16 high x 1 5/8 wide. They also have clamps to secure it to the trailer frame. I placed one between each of the ones that were welded at the factory.

2018 KZ 270thle
2015 Silverado.
2012 GL1800
glwinger is offline   Reply With Quote

fresh water, tank, water

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Water pump pumping water from fresh water tank into grey tank?? Amen Monaco Owner's Forum 16 09-13-2017 04:15 PM
sagging fresh water tank (2016 model) diesel97 Travel Trailer Discussion 4 07-05-2017 01:59 AM
Is Red Bay still fixing sagging water tank compartment floors? Roamin Mike Tiffin Owner's Forum 8 02-05-2017 05:37 PM
Hot Water Tank vs Fresh Water Tank Nomad Mike Winnebago Industries Owner's Forum 21 07-30-2015 06:23 AM
Fresh Water Tank Sagging yuppie_rednk Alpine Coach Owner's Forum 13 02-17-2015 06:40 PM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 02:30 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.