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04-17-2021, 09:28 AM
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#1
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Senior Member
Join Date: Oct 2020
Location: Newport
Posts: 215
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Fresh tank manufacturing flaw :(
So I have a leak on my fresh water tank. It only leaks when the tank is completely full. I chased it down and it appears that the fitting that is glued to the tank at the top where the vent line attaches did not get glued all the way around. Now I need to know what kind of glue/solvent to use to try and seal this leak. It would be covered under warranty but that will take weeks to months at the dealer. Not sure if they would try to fix it or just replace the entire tank.
The area in the red circle on the attached pic is where the leak is. I can stick my fingernail between the flange of the fitting and the tank.
Anyone know what solvent/glue/sealant will work on these tanks?
__________________
2021 Keystone Cougar Half-Ton 32BHS 5th Wheel
2022 F-450SD, Lariat Ultimate, CC, 4WD, FX4, Rapid Red, Curt A16/R24 Slider
Upgraded: 2020 F-250SD, XLT Pre, CC, SWB, 4WD, FX4, HCTP, 6.7 PSD, 3.55 e-lock, Blue Jeans Metallic
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04-17-2021, 09:34 AM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,317
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Those fittings are "spin welded" meaning there is a machine that spins the part and they melt together. Since there isnt any pressure on that fitting I would use any FOOD GRADE sealant.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-17-2021, 09:56 AM
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#3
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Senior Member
Join Date: Oct 2020
Location: Newport
Posts: 215
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Quote:
Originally Posted by chuckster57
Those fittings are "spin welded" meaning there is a machine that spins the part and they melt together. Since there isnt any pressure on that fitting I would use any FOOD GRADE sealant.
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That's what I thought as well but there is clearly some sort of adhesive being used to bond these fittings to this tank. You can see where it oozed out around them.
__________________
2021 Keystone Cougar Half-Ton 32BHS 5th Wheel
2022 F-450SD, Lariat Ultimate, CC, 4WD, FX4, Rapid Red, Curt A16/R24 Slider
Upgraded: 2020 F-250SD, XLT Pre, CC, SWB, 4WD, FX4, HCTP, 6.7 PSD, 3.55 e-lock, Blue Jeans Metallic
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04-17-2021, 10:04 AM
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#4
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,317
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Are you sure it isnt the same material as the tank? Permatex makes a tank repair kit and it doesnt say NOT to use on a fresh tank.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-17-2021, 10:07 AM
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#5
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,741
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As CFhuck stated they are "spin weld" fittings. They are chucked into a drill and spun at hight speed so I think what you are looking at is the result of the plastic being slung out by centrifical force, like a polisher slings wax around a buffing pad.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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04-17-2021, 10:19 AM
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#6
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Senior Member
Join Date: Oct 2020
Location: Newport
Posts: 215
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Quote:
Originally Posted by chuckster57
Are you sure it isnt the same material as the tank? Permatex makes a tank repair kit and it doesnt say NOT to use on a fresh tank.
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Quote:
Originally Posted by flybouy
As CFhuck stated they are "spin weld" fittings. They are chucked into a drill and spun at hight speed so I think what you are looking at is the result of the plastic being slung out by centrifical force, like a polisher slings wax around a buffing pad.
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I hear what you are saying but what I see does not agree with you. I have seen many spin welded fittings and these do not look to be spin welded. Spin welded would also not likely have a failure like this one.
__________________
2021 Keystone Cougar Half-Ton 32BHS 5th Wheel
2022 F-450SD, Lariat Ultimate, CC, 4WD, FX4, Rapid Red, Curt A16/R24 Slider
Upgraded: 2020 F-250SD, XLT Pre, CC, SWB, 4WD, FX4, HCTP, 6.7 PSD, 3.55 e-lock, Blue Jeans Metallic
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04-17-2021, 10:26 AM
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#7
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,317
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Ive taken a closer look WITH MY GLASSES ON, and I still say its a failed spin weld. get the permatex kit and call it a day
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-17-2021, 11:16 AM
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#8
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Senior Member
Join Date: Oct 2014
Location: Germantown, TN
Posts: 6,327
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As a fairly sharp RV tech once said, "Get the Permatex kit and call it a day." I concur 100%. There is zero pressure so it is almost can't miss.
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Jim in Memphis, Wife of 51 years is Brenda
2019 F450 6.7 Powerstroke
2018 Mobile Suites 40RSSA
2021 40' Jayco Eagle
2001 Road king w/matching Harley sidecar
2021 Yamaha X2 Wolverine 1000
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04-17-2021, 11:42 AM
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#9
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,979
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Or, get a pencil type soldering iron and "finish the spin weld seal"... If you "really, REALLY want to get fancy" you can get a "plastic welding kit" from Harbor Freight and spend 3 or 4 days "perfecting your bead"....
For me, since it's not something every visitor is going to be checking, I'd probably not even wipe off the soldering iron tip. Who cares if there's a little "no lead solder" to contaminate the melted plastic.....
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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04-17-2021, 12:01 PM
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#10
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Senior Member
Join Date: Jul 2013
Location: Box Elder
Posts: 2,907
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Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
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04-17-2021, 12:09 PM
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#11
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,317
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Quote:
Originally Posted by bobbecky
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I believe thats the one I said to use. Thank you for posting the link..I'm buried in the garage under my 4th car for the day..
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-17-2021, 02:24 PM
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#12
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Senior Member
Join Date: Oct 2020
Location: Newport
Posts: 215
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So I tried the soldering iron trick mentioned above and it did a pretty good job. Fixed the major leak. There is still a pinhole up on top somewhere. It is very difficult to work in the area of these fittings without 6 arms. I need one for holding a mirror, one for holding the flashlight, one for holding the wires out of the way and one to run the soldering iron. LOL.
Whoever built this tank was not having a good day.
Another issue is that Keystone uses a spiral wound reinforced hose for the fill line. It is almost impossible to tighten a clamp enough to seal this hose due to the spiral path water has to leak out of. Not a good application for that kind of hose.
__________________
2021 Keystone Cougar Half-Ton 32BHS 5th Wheel
2022 F-450SD, Lariat Ultimate, CC, 4WD, FX4, Rapid Red, Curt A16/R24 Slider
Upgraded: 2020 F-250SD, XLT Pre, CC, SWB, 4WD, FX4, HCTP, 6.7 PSD, 3.55 e-lock, Blue Jeans Metallic
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04-17-2021, 02:52 PM
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#13
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,317
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White plumbers pipe dope.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-17-2021, 02:57 PM
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#14
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Senior Member
Join Date: Oct 2020
Location: Newport
Posts: 215
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Quote:
Originally Posted by chuckster57
White plumbers pipe dope.
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To seal the spiral reinforced fill-line tube?
__________________
2021 Keystone Cougar Half-Ton 32BHS 5th Wheel
2022 F-450SD, Lariat Ultimate, CC, 4WD, FX4, Rapid Red, Curt A16/R24 Slider
Upgraded: 2020 F-250SD, XLT Pre, CC, SWB, 4WD, FX4, HCTP, 6.7 PSD, 3.55 e-lock, Blue Jeans Metallic
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04-17-2021, 03:34 PM
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#15
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,317
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I put a good slathering on the tank fitting, slide the fill hose on and clamp. You may need 2 clamps.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-18-2021, 07:47 AM
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#16
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Senior Member
Join Date: Sep 2019
Location: Florissant
Posts: 698
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Plumbers Goop will fix anything and it stays semi-plyable.
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Skids
2019 Bullet 248RKS
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04-22-2021, 09:05 AM
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#17
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Member
Join Date: Mar 2017
Location: Westminster
Posts: 91
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Bobby
2021 Nights Camped 55
2021 GD Reflection 150 260RD (Current)
2018 Keystone 24RKPR (Previous)
2016 Ram 2500 Tradesman CTD
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04-22-2021, 10:27 AM
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#18
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Senior Member
Join Date: Oct 2019
Location: Central FL
Posts: 1,087
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Two more arms for that fill hose there friend.
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2023 Cougar HT 23MLE
2020 F250 XLT CC 6.2 4WD
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