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07-28-2018, 05:36 AM
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#1
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Montana Master
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,896
M.O.C. #9561
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Water in Under Belly
Rain water is getting into our underbelly of our Montana. I am assuming it is road water when driving.
Just wondering if others have run into this issue? And any suggestions on how to to deal with this issue, if any.
And no, none of the tanks are leaking.
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07-28-2018, 05:48 AM
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#2
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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If you look under there it would be pretty difficult to seal from road water when driving. One source of water I found was the valve under the bathroom sink used a backflow preventer. brain fart is making forget he proper name of it.
__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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07-28-2018, 07:23 AM
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#3
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Montana Master
Join Date: May 2005
Location: Fall Creek
Posts: 1,333
M.O.C. #3699
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FYI, earlier this year in May I had water, lots of water in the belly from a leaking check valve under the sink in the bathroom. Not fun.
__________________
Bob and Nancy Kassl Fall Creek, Wisconsin
2015 Montana 3440RL Legacy Edition, G614's, Pressure Pro TPMS, Dish Tailgaters
2016 GMC Sierra Denali 3500 CC SRW, Iridium Metallic, Duramax Allison Transmission
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07-28-2018, 11:42 AM
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#4
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Montana Master
Join Date: Jan 2018
Location: Thornville
Posts: 546
M.O.C. #21110
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Quote:
Originally Posted by jeffba
If you look under there it would be pretty difficult to seal from road water when driving. One source of water I found was the valve under the bathroom sink used a backflow preventer. brain fart is making forget he proper name of it.
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Technical name is a "vacuum breaker" for the power tank flush of the black tank. IF it is leaking,replcae with a brass one, or just bypass it completely ,or continue to use the junky plastic style.
When mine leaked on 1st use of the new coach, it let water into my pass thru storage, and I shut water supply off before it got any significant amount of water in it. Soaked water up with 1 towel, fortunate I was standing there watching for leak!!!
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Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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08-02-2018, 08:27 PM
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#5
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Established Member
Join Date: Jan 2018
Location: Arlington
Posts: 19
M.O.C. #21018
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Quote:
Originally Posted by CarWin
Technical name is a "vacuum breaker" for the power tank flush of the black tank. IF it is leaking,replcae with a brass one, or just bypass it completely ,or continue to use the junky plastic style.
When mine leaked on 1st use of the new coach, it let water into my pass thru storage, and I shut water supply off before it got any significant amount of water in it. Soaked water up with 1 towel, fortunate I was standing there watching for leak!!!
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We had the same problem on our 2018 HC 362RD. Frustrating to get resolved, but the dealer service team finally acknowledged the problem and replaced the broken piece when it sprayed water in the pass through while we were all standing there watching (we requested proof of repair before we picked it up). Not only was the vacuum breaker broken (slow leak), it had a nail or screw through one of the pipes (much faster spray leak). It has worked since then, but is still in their possession for something else.
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07-28-2018, 07:55 AM
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#6
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Montana Master
Join Date: Jan 2005
Location: North Ridgeville
Posts: 20,229
M.O.C. #2839
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The probability is high that you have a holding tank leak.
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07-28-2018, 08:13 AM
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#7
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Montana Fan
Join Date: Jun 2013
Location: Boise
Posts: 288
M.O.C. #13564
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Agree with Richfaa. found through personal experience that a split at the top of the tank will occur when over filled. The leak only occurs when driving and sloshing water around in the tank or when filled to the top again. Tank failure is a somewhat common problem and can be fixed or replaced depending on your energy level!! good luck
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07-28-2018, 08:55 AM
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#8
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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Quote:
Originally Posted by Dmcgrew
Agree with Richfaa. found through personal experience that a split at the top of the tank will occur when over filled. The leak only occurs when driving and sloshing water around in the tank or when filled to the top again. Tank failure is a somewhat common problem and can be fixed or replaced depending on your energy level!! good luck
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I may have this issue. Sounds like good excuse for that snake rope camera I want!!
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James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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07-28-2018, 12:54 PM
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#9
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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I found that I get water into the edges of the coroplast, then it leaks into the bottom wherever the bottom is cut...like around the galley sink drain pipe that connects into the sewer outlet as well as where the solid rod for the galley grey tank drain. I sealed the edges with tape. Now that morryde put the i.s. on, I need to find time to crawl under and check the bottom to make sure new avenues aren't present.
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2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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07-28-2018, 01:32 PM
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#10
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Montana Fan
Join Date: Sep 2016
Location: West Melbourne
Posts: 310
M.O.C. #18980
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Mine fills with rainwater when we have driving rain, I determined it is on the drivers side. First happened when sitting through a hurricane last fall. I think it is coming in through the external furnace vent then down through the heater outlet on top of my tanks. In my case I know it is not tank water as it happens when stored, empty.
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Butch and Kathy
2016 3160RL Legacy, Sailun S637, Centramatic Balancers, 2-T105s, Amish Refrigeration, ARPrv, SoftStartRV, FlexArmor roof
2016 F350 6.7L SRW
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07-28-2018, 01:47 PM
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#11
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Montana Master
Join Date: Jan 2018
Location: Austin
Posts: 2,459
M.O.C. #21044
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Rain water vs black water?
Wouldn’t it be easy to tell if it is rain water/road splash vs. black or grey water based on smell?
__________________
MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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07-28-2018, 05:13 PM
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#12
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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Quote:
Originally Posted by Mikendebbie
Wouldn’t it be easy to tell if it is rain water/road splash vs. black or grey water based on smell?
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Black water probably so but gray not so much. And then there is the fresh water tank that as others have said can be cracked just from filling
__________________
James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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07-28-2018, 07:56 PM
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#13
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Montana Master
Join Date: Jan 2018
Location: Thornville
Posts: 546
M.O.C. #21110
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Quote:
Originally Posted by Mikendebbie
Wouldn’t it be easy to tell if it is rain water/road splash vs. black or grey water based on smell?
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IF smell doesn't give any clues, maybe the TASTE will....(sorry couldn't resist).
__________________
Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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07-28-2018, 11:55 PM
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#14
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Montana Master
Join Date: May 2017
Location: new caney
Posts: 1,050
M.O.C. #19873
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Quote:
Originally Posted by CarWin
IF smell doesn't give any clues, maybe the TASTE will....(sorry couldn't resist).
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Did you say sweet or unsweet?
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08-01-2018, 04:21 PM
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#15
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Montana Master
Join Date: Aug 2015
Location: SWFL
Posts: 964
M.O.C. #17801
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Had a water leak in the SOB we owned, and when the belly was drooping very low as a result I drilled a 1/4" hole at the lowest point to drain it. It never opened up larger or tore because of the hole.
__________________
2016 Montana 3711FL
2005 Ford F350, 6.0 diesel, short bed
Demco Hitchiker Auto Slide hitch
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08-01-2018, 07:02 PM
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#16
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Montana Master
Join Date: Jan 2005
Location: North Ridgeville
Posts: 20,229
M.O.C. #2839
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Did the same as philly.g then you can determine what kind of water it is.
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08-02-2018, 05:44 AM
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#17
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Montana Fan
Join Date: Apr 2013
Location: Lehigh Acres
Posts: 492
M.O.C. #13354
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I had water in my belly, it was a grey broken grey holding tank that was cracked then eventually ruptured.
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08-02-2018, 01:27 PM
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#18
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Montana Master
Join Date: Jun 2018
Location: Carson City
Posts: 2,017
M.O.C. #21963
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If it is rainwater from the road, no big deal. It will flow out or dry. Preventing it is futile and pointless. If it is coming from the top down, like through walls or whatever, that needs to be found and fixed.
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