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Old 07-03-2019, 09:19 PM   #1
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58 gallon tank?

I asked this in the plumbing subforum and got no response. It's about a Rockwood so maybe someone here has an answer.

Has anyone seen the 58 gallon freshwater tank installation on new Micro-/Mini- Lites? That's an additional 175 or so pounds over the 36 gallon tank. Has the bracket improved? Will the frame hold it securely?

Thanks
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Old 07-03-2019, 09:25 PM   #2
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Originally Posted by chriscowles View Post
I asked this in the plumbing subforum and got no response. It's about a Rockwood so maybe someone here has an answer.

Has anyone seen the 58 gallon freshwater tank installation on new Micro-/Mini- Lites? That's an additional 175 or so pounds over the 36 gallon tank. Has the bracket improved? Will the frame hold it securely?

Thanks
I'll bet most people don't even know to look. I think the new ones are coming with the underbelly covered, so you can't see it anyway, unless you cut it open or drop it.
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Old 07-03-2019, 09:27 PM   #3
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Originally Posted by rockfordroo View Post
I'll bet most people don't even know to look. I think the new ones are coming with the underbelly covered, so you can't see it anyway, unless you cut it open or drop it.
Yeah, I'm aware that it's covered. I'm paranoid enough to open it just to look at the tank mount, when I get the next trailer. But, if anyone here has seen it and describes it as being adequately improved, maybe I won't.

Thanks for your attention.
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Old 07-04-2019, 08:31 AM   #4
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I got this answer by email from Forest River. I'm still considering rolling back the bottom insulation to confirm.
Quote:
Yes, not only did we increase the gauge of steel used in the angle iron, we added another piece of angle iron. Before, there were only two pieces for support. Now there are three underneath.
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Old 07-04-2019, 11:23 AM   #5
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I got this answer by email from Forest River. I'm still considering rolling back the bottom insulation to confirm.
I wonder when they did this. We have a 2019 rockwood ultra 2606ws and with all the forum tall of tanks falling out if I should worry.
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Old 07-04-2019, 06:13 PM   #6
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Originally Posted by Greg in michigan View Post
I wonder when they did this. We have a 2019 rockwood ultra 2606ws and with all the forum tall of tanks falling out if I should worry.
Greg in Michigan
If I were you, I'd look before I carried any more than a few gallons. Better safe than sorry.
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Old 07-04-2019, 11:33 PM   #7
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If I were you, I'd look before I carried any more than a few gallons. Better safe than sorry.
@ Greg in Michigan, if you do look and find that you have the new design with 3 supports, can you post pictures?

The increase from 2 to 3 supports would seem to have the same level of support as the previous design, considering that the tank is > 50% larger. If the increased size of the angle iron is a significant improvement, it may be sufficient.
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Old 07-08-2019, 07:57 AM   #8
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I used a bore scope camera through a belly cover vent opening this weekend on our 2020 2109S and confirmed that it does have three intermediate supports, you can actually push on the belly cover and feel all three. The tank appears to be supported on the ends as well.

I could not determine how substantial there are though. It's kind of goofy that they notch the angle that far back from the cross members for no good reason, that's the weak point. Thickness of the angle support appears to possibly be 3/16" thick? Angle appears to be approximately 1-1/4"ish?

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Old 08-12-2019, 12:51 PM   #9
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I cut the section of coroplast belly cover out on our 2020 Mini Lite and rebuilt the entire supports system, then reinstalled the section of belly cover to act as a big access panel.







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Old 08-12-2019, 11:44 PM   #10
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I cut the section of coroplast belly cover out on our 2020 Mini Lite and rebuilt the entire supports system, then reinstalled the section of belly cover to act as a big access panel.
Other than cutting it into a separate section, did you reattach the coroplast in a way that makes it more easily removed? If so, how?
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Old 08-13-2019, 07:40 AM   #11
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Other than cutting it into a separate section, did you reattach the coroplast in a way that makes it more easily removed? If so, how?
Self-tapping screws and then sealed the seams with Butyl tape.

The factory screws are actually more like nails with ridges and I seriously doubt they can be removed without breaking.

More details -

I cut the section of coroplast belly cover out on our 2020 Mini Lite and rebuilt the entire supports system for our 52 gallon FW tank, then reinstalled the section of belly cover to act as a big access panel.

I used 1/2" PVC rigid board between the steel supports and the tank to distribute the weight and prevent the tank from sagging between supports.

The belly cover panel was mounted with self-tapping screws and the seams sealed with Butyl rubber flashing tape.

Everything is bolt-in and easily removable for tank service. The new cross members are bolted to the factory ones. The new cross members are 2"x2"x1/4" angle and the center intermediate supports are 1-1/2"x1-1/2"x3/16" angle.

The first picture is the factory support.













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Old 08-14-2019, 03:04 PM   #12
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I bet the new ones will be fine. Every single failure I have seen has been from the front frame cross support bending at the slots stamped on the vertical side of the angle iron. From 01tundra's pics they aren't stamping those slots on both sides of the angle iron anymore, only on the bottom for the braces to fit into. I bet that solves the problem 100% from now on. I have never scene a failure of a rear support, which is the same design as the new front supports. No idea why they made them different all those years....
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Old 08-14-2019, 03:18 PM   #13
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Originally Posted by Abendage View Post
I bet the new ones will be fine. Every single failure I have seen has been from the front frame cross support bending at the slots stamped on the vertical side of the angle iron. From 01tundra's pics they aren't stamping those slots on both sides of the angle iron anymore, only on the bottom for the braces to fit into. I bet that solves the problem 100% from now on. I have never scene a failure of a rear support, which is the same design as the new front supports. No idea why they made them different all those years....
Popular wisdom (ha ha) says so the factory guys didn't have to waste time orienting them properly - they'll fit either way. Now they have to actually stop and figure out which way to put them in.
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Old 08-14-2019, 03:35 PM   #14
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Originally Posted by rockfordroo View Post
Popular wisdom (ha ha) says so the factory guys didn't have to waste time orienting them properly - they'll fit either way. Now they have to actually stop and figure out which way to put them in.
Yeah, but the rear ones were only slotted on one side, so they had to figure out which way to put those ones in. Why just the front with the double slots?
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Old 08-14-2019, 05:52 PM   #15
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Yeah, but the rear ones were only slotted on one side, so they had to figure out which way to put those ones in. Why just the front with the double slots?
Don't know. Guess I'm not "popularly wise!"

"If you can't dazzle them with brilliance, baffle them with BS."

Actually, do we KNOW that all the rear ones only had 1 set of slots? Or is that, perhaps, more "popular wisdom?" I sure don't know.
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2012 Roo19 - hybrid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
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Old 08-14-2019, 06:43 PM   #16
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Quote:
Originally Posted by 01tundra View Post
Self-tapping screws and then sealed the seams with Butyl tape.

The factory screws are actually more like nails with ridges and I seriously doubt they can be removed without breaking.

More details -

I cut the section of coroplast belly cover out on our 2020 Mini Lite and rebuilt the entire supports system for our 52 gallon FW tank, then reinstalled the section of belly cover to act as a big access panel.

I used 1/2" PVC rigid board between the steel supports and the tank to distribute the weight and prevent the tank from sagging between supports.

The belly cover panel was mounted with self-tapping screws and the seams sealed with Butyl rubber flashing tape.

Everything is bolt-in and easily removable for tank service. The new cross members are bolted to the factory ones. The new cross members are 2"x2"x1/4" angle and the center intermediate supports are 1-1/2"x1-1/2"x3/16" angle.

The first picture is the factory support.













Those "factory nails" come out easily. A 1/4" 6-point socket in a cordless screwdriver will twist them out in reverse. Just remove a y plastic around the head that's a remnant from the "nail driver centering ring".

I used TEK screws that were just a slight bit larger than the nail holes to replace my chloroplast, using the original washers.
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