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Old 10-06-2016, 02:52 PM   #1
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Unhappy Black Water Tank

I have a 2000 Springdale, which has a small crack in the tank. I made the tear by pushing a snake down the tolit , thinking I had a clogged tolit drain. Found out the valve wasn't opened. Who would have known that there were 2 valves for the tolit drain. Is there a glue that is sold to fix this crack? Help , Bernice
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Old 10-06-2016, 03:13 PM   #2
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Are all or most Black water tanks made of Fiberglass? So is there a glue on the market to patch fiberglass tanks.
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Old 10-06-2016, 03:19 PM   #3
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Most RV holding tanks are made of ABS plastic. This is the black plastic that plumbing pipe and fittings are made of. Translucent white tanks are Low Density Polyethylene or LDPE.
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Old 10-06-2016, 03:20 PM   #4
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PlasticWeld Epoxy Putty | J-B Weld

I would give this a try. good on fiberglass and plastic
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Old 10-06-2016, 04:22 PM   #5
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Does anyone know if making a hole or a crack in the Black Water Tank pretty easy to do? Is this a big problem with RV's or are we the unlucky ones.
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Old 10-06-2016, 04:34 PM   #6
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I cracked my grey tank , almost a foot and half long, it was made out of abs, I took the tank out cleaned the area out , I got a repair kit that was pellets of abs you mix it with acetone nice and thick then spread it over the broken area, it dried fast but I left it over nite, it worked great and is still holding today that was 4 years ago from icondirect.com out of Manitoba
My tank cracked because I didn't have enough centre support when I installed it, the bouncing with some water in it caused it to crack
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Old 10-06-2016, 04:43 PM   #7
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So, do I take the Black Water Tank out & repair it, or can I just crawl under the Travel Trailer, & try to fix it with the JB Weld.
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Old 10-06-2016, 05:05 PM   #8
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The crack has to be clean and dry , you can try it with out taking the tank out, taking the tank out , and cleaning out the crack might be better, but either way should work
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Old 10-06-2016, 05:20 PM   #9
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Either way I do it, I guess one has to crawl underneath the trailer, right?
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Old 10-06-2016, 07:56 PM   #10
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DO NOT use JBWeld for a repair attempt, if you can access the crack the best bet for a repair would be to clean the area, i suggest using Acetone or alcohol. then mix acetone and ABS beads, shavings, or sawdust to make a fairly thick paste, then clean area again with Acetone. Spread the paste onto the crack and let dry.

Would also be of use to groove the crack about half the depth of the thickness of the tank wall prior to the application of the created repair paste.
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Old 10-06-2016, 08:00 PM   #11
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I'd use marine caulk. That stuff is water proof like crazy

https://www.amazon.com/3M-Marine-Adh.../dp/B01D893FTW
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Old 10-06-2016, 08:10 PM   #12
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O.K. Thanks everyone.
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Old 10-06-2016, 08:41 PM   #13
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If you can get to the crack you can fix it the right way by welding it with a hot air welding torch and pieces of plastic bucket as welding rod. You can also use a large weller soldering iron instead of the torch. I did this on mine 4 years ago and it works fine. melt the crack edges and add some extra "rod" to fill in and keep moving down the crack till the end is met.
Find an number of youtubes on welding plastic to see how to do it. It works!
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Old 10-12-2016, 02:45 PM   #14
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Quote:
Originally Posted by Roosters 67 View Post
DO NOT use JBWeld for a repair attempt, if you can access the crack the best bet for a repair would be to clean the area, i suggest using Acetone or alcohol. then mix acetone and ABS beads, shavings, or sawdust to make a fairly thick paste, then clean area again with Acetone. Spread the paste onto the crack and let dry.

Would also be of use to groove the crack about half the depth of the thickness of the tank wall prior to the application of the created repair paste.
open up the crack a bit to accommodate the repair filler, its difficult to fill

a crack.

Jim
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