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Old 11-10-2017, 04:27 PM   #1
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Fresh water tank sagging

My fresh water tank is sagging (photos attached). It has come off the frame lip on one corner. And the undercarriage blanket has break away (from the supporting bolt) in a spot where the tank is sagging.
The two tin wire staps appear to be holding it up in the middle.
Is the tank supposed to be lower (bowed) in the middle? Should I be concerned?

Note that it is still under warranty.
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Old 11-10-2017, 05:07 PM   #2
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I think I would, you need to reinforce it. Don't travel with water until you get it supported just my opinion I can't really tell by the pictures. Can you brace it in the center?
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Old 11-10-2017, 05:25 PM   #3
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I can't tell what trailer you have, but several of the "lighter" ones seem to have issues with the tank brackets.
And yes, you should have this looked after before it drops to the ground.
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Old 11-10-2017, 05:28 PM   #4
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Fresh water tanks have fallen out. I would have the supports refurbished before putting water back in.
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Old 11-10-2017, 05:33 PM   #5
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Call dealer now and get it fixed. The dealer should beef and bracket it up a lot more than it is originally. These units should be able to travel with a full load of water... Absolutely no excuse that water tanks should fall out because the bracing fails. If the dealer puts is back as 'original' and does not beef it up.... Never trust it as it will fail again. Do not leave the dealer until it is beefed up with extra or bigger brackets.

Why am I so adamant about this..... I was following my brother-in-law with his camper.... he hit a bump and out comes his water tank when two straps broke.... I did not run over it, but it got my attention really fast as I slammed on the brakes and swerved to the side.... He did not even know that his water tank 'was gone'..... (funny now, but not at the time)
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Old 11-10-2017, 05:50 PM   #6
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I suggest you post year/make/model of your unit; others with the same one may have some words of wisdom for you.

As Cypressloser alluded, I know that Rockwood Mini Lights and Flagstaff Micro Lights have had issues with their water tank supports.
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Old 11-10-2017, 07:40 PM   #7
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Supports

Thanks for all the replies. There are no true support arms, but rather two strips of 3/4” steel perforated duct tape (see photo) under the tank supported by a screw on each side.

My rig is a 2018 Cardinal 3350RL.

I am a full-timer and have to boondock several times per month, so travelling with an empty fresh-water tank is not a possibility all the time.
Coach Net, the roadside assistance for FR has returned my call, and they are looking for FR dealerships nearby who may possibly help. They say there is an 80% chance that i’ll have to pay for this out-of-pocket even though it’s only a few months old and still under warranty. I’ll let you know what happens in a few days.
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Old 11-10-2017, 08:11 PM   #8
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Ha, My Coachman 15RB Hybrid had the perforated "plumbers tape" straps under the tank.
I looked at it and just laughed. The tank sagged down 5-6" in the middle when full. You cant even get that water out as the pickup is higher than the lowest part.
I ran two support bars, front to back under the tank from the larger frame rails.
No more sag and I do not worry about it falling out when full.
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Old 11-10-2017, 08:34 PM   #9
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My 07 Wildcat fresh water tank just did the same thing a few months ago. The plastic is SO flexible it doesn't hold shape and bubbled through the straps.
My solution was to add a removable crossmember to support it.
See below for before & after.
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Old 11-10-2017, 08:36 PM   #10
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If they tell me that I have to pay for this myself, I will simply have steel braces welded onto the frame supporting the tank in the middle.
As the tank still works perfectly (all sensors work, no leaks, over-flows still work). And you make a good point, i now have no way completely drain the tank.
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Old 11-10-2017, 08:47 PM   #11
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I would advise you to contact FR warranty person directly. Mine was Diane Daly (sp?), who was very professional... I don't know who that is for your model, but this should be covered. I had some issues with my belly pan (coroplast) but the tank supports are stout... some sag, but nothing like yours. Poor engineering?
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Old 11-10-2017, 08:50 PM   #12
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Quote:
Originally Posted by Daniellekristopher View Post
If they tell me that I have to pay for this myself, I will simply have steel braces welded onto the frame supporting the tank in the middle.
If you do that, make sure it uses some sort of method to allow removal in case you ever need to drop the tank.
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Old 11-10-2017, 09:38 PM   #13
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Quote:
Originally Posted by Daniellekristopher View Post
Thanks for all the replies. There are no true support arms, but rather two strips of 3/4Ē steel perforated duct tape (see photo) under the tank supported by a screw on each side.

My rig is a 2018 Cardinal 3350RL.

I am a full-timer and have to boondock several times per month, so travelling with an empty fresh-water tank is not a possibility all the time.
Coach Net, the roadside assistance for FR has returned my call, and they are looking for FR dealerships nearby who may possibly help. They say there is an 80% chance that iíll have to pay for this out-of-pocket even though itís only a few months old and still under warranty. Iíll let you know what happens in a few days.
How can there be even a 1% chance you have to pay for fixing a 2018 NEW unit. Is the warranty meaningless?
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Old 11-11-2017, 09:03 AM   #14
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Fresh water tank sagging

My suggestion would be to contact FR directly and get an answer from them regarding the transportation of water in your freshwater tank. Before my last boondocking trip I sent them an email asking if it was ok to transport water in my freshwater tank and here is the response I received.
ďWhat we recommend is that you only have enough water in your tank to get you to, or near your destination and then top off. Reason being that each gallon of water weighs 8+ pounds which puts a full tank at over 350 pounds. The supports easily hold this load, but this issue is while traveling, that if your tank is full and you encounter any bumps that force multiplies the stress on the tank support brackets. Hope that makes sense.Ē
Needless to say, I didnít get the answer I wanted but I would rather plan accordingly than deal with a difficult result.
On the plus side of things, the next RV I purchase, I will know what one of the requirements will be.
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Old 11-11-2017, 11:28 AM   #15
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ďWhat we recommend is that you only have enough water in your tank to get you to, or near your destination and then top off. Reason being that each gallon of water weighs 8+ pounds which puts a full tank at over 350 pounds. The supports easily hold this load, but this issue is while traveling, that if your tank is full and you encounter any bumps that force multiplies the stress on the tank support brackets. Hope that makes sense.Ē
Needless to say, I didnít get the answer I wanted but I would rather plan accordingly than deal with a difficult result.
On the plus side of things, the next RV I purchase, I will know what one of the requirements will be.
HIH,
Tom G
I read that in my trailer manual. Really disheartening. What they are saying is, why yes you can fill your water tank, that is what it is there for. But because we engineered the brackets to hold the tank with full water on our smooth factory floor, you can be screwed if you take it down the road.

Really isn't very difficult to engineer higher capacity brackets. But I guess $5-10 more cost is $5-10 more.

Okay, rant off.

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Old 11-11-2017, 02:20 PM   #16
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Quote:
Originally Posted by Daniellekristopher View Post
Thanks for all the replies. There are no true support arms, but rather two strips of 3/4Ē steel perforated duct tape (see photo) under the tank supported by a screw on each side.

My rig is a 2018 Cardinal 3350RL.

I am a full-timer and have to boondock several times per month, so travelling with an empty fresh-water tank is not a possibility all the time.
Coach Net, the roadside assistance for FR has returned my call, and they are looking for FR dealerships nearby who may possibly help. They say there is an 80% chance that iíll have to pay for this out-of-pocket even though itís only a few months old and still under warranty. Iíll let you know what happens in a few days.

Wow! I debated between the Cardinal 3350 and 3250 for a number of months. Ultimately I settled on the 2016 3250.
I travel with full tanks quite often because, like you, i boondocks a bunch.
Iíve read the water tank issues for some time but never looked beyond pushing the underbelly up to see if there was any Tank sagging. Your post prompted me to remove enough screws to peek inside to see how mine was structured.
Mine is sitting on an angle iron frame that goes width wise on the 5er. Plus I have 2 welded in lengths of flatbar that support the tank at the 1/3 points on the Tank. They are welded to the angle iron frame that keeps the angle iron frame square.
Iím not impressed with the welds, to say the least, but it all appears sturdy at this point.
Thanks for your post and getting me motivated to look further into this.
Good luck with your repair!
Bill
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Old 11-11-2017, 03:58 PM   #17
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Bill, Do you still have the underbelly pulled down enough to get a picture? It sure would help the OP to explain how it should of been braced.
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Old 11-11-2017, 04:14 PM   #18
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Originally Posted by 05CrewDually View Post
Bill, Do you still have the underbelly pulled down enough to get a picture? It sure would help the OP to explain how it should of been braced.


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See if these come through ok.
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Old 11-11-2017, 04:22 PM   #19
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I get it, but I know what I'm looking at. 😁

Are you the original owner or 2nd? Reason I ask is because the braces are brown and not chassis black like all the other frames. I wonder if prior owner added them.
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Old 11-11-2017, 04:39 PM   #20
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Originally Posted by 05CrewDually View Post
I get it, but I know what I'm looking at.

Are you the original owner or 2nd? Reason I ask is because the braces are brown and not chassis black like all the other frames. I wonder if prior owner added them.


Iím the first owner.
The more I look at it, itís a preconstructed frame with 2 sheet metal screws on each side holding it into the 5er chassis. It appears the flat bar is just laid into the frame similar to a bed frame. The ďweldsĒ I was looking at are not in the frame or slats. I donít see any signs of a weld on the flat-bar but could be on top where I canít see.
Iím thinking it would be relatively easy to empty the tank, use 2 bottle jacks with a 2x4 to raise the tank 1/4Ē, or take the bow out of it, and slide pre-cut flat bar into the frame. It canít go anywhere if it worked its way out with the underbelly there. Just a random thought...lol
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