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Old 05-31-2020, 01:19 PM   #1
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Default Repair leaking fresh water tank

The fresh water tank in my XT276 had a crack in the drain boss the drain valve screws into.

I searched for an exact replacement without success. Therefore, I sought a method to repair the drain boss. The tanks are made of HDPE so no common glue will adhere to them.

I used this product for the repair that is holding up well. It requires a multi step process of heating the area for repair, and addition of some fiberglass material for strength but the results are good- as in no more leak!!

https://mrstickys.com/mr-stickys-poly-bonder-glue-30g/

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2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.
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Old 05-31-2020, 05:25 PM   #2
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Thanks for the tip! What did you use to incorporate the fiberglass into the repair -- resin, or the Mr. Sticky? And did you use sheets of woven fiberglass, or little pieces?
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2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
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Old 06-01-2020, 06:06 AM   #3
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I applied some of the Mr. Sticky and then put on a strip of fiberglass cloth and then applied another layer of Mr. Sticky over the fiberglass cloth.

The fiberglass cloth does not come with the Mr. Sticky - purchased some at an auto parts store. Of the piece purchased, I cut a strip to the width/length to wrap around the water tank outlet boss...just one layer thick.
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2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.
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Old 06-01-2020, 09:29 AM   #4
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Great -- thanks!
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Old 06-01-2020, 03:54 PM   #5
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And for those who like JB Weld products, I sent them an inquiry if they had a product that would work on HDPE and this was their reply:

"The only product we have that might adhere to that material is our Plastic Bonder #50133.

J-B Weld Support
P.O. Box 483 | Sulphur Springs, TX 75483
Ph: 903.885.7696 | Fx: 903.885.5911
JBWeld logo for email sig"

Because in their reply the 'key word' was "MIGHT" I opted not to try it.

Just F.Y.I.
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2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.
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