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Old 09-02-2013, 02:20 PM   #1
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black water tank ?

ok so a friend of mine helped me clean out my black water tank and I was doing other things. he hooked up the wash out hose on the side of the tank but he didn't open the drain valve. the tank cracked on the top of the tank about 12" long. how can I fix this? it is on a 1990 HR
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Old 09-02-2013, 02:43 PM   #2
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If it is a poly tank it will require welding a like material.
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Old 09-02-2013, 02:44 PM   #3
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I am afraid your friend cannot be fixed.

There have been threads on fixing cracks in various tanks but that sounds like a big crack. May need to replace both friend and tank.

Someone with first hand experience "welding" tanks will come along. In the meantime try the search (I hate to get much less give that response). Does seem that a recent thread was posted though so might not be too hard to find.

Good luck.
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Old 09-02-2013, 02:53 PM   #4
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Eternabond Tape.
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Old 09-02-2013, 03:20 PM   #5
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I can't get it down . I unbolted it took the drain pipe off still only comes down 1/4 in. Any ideas?
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Old 09-02-2013, 03:39 PM   #6
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Sorry for your troubles but it doesn't sound good.

I'd sure be checking your black tank vent when you do the repair because I don't see why your tank would burst if the vent were clear. The water should have been forced up through your roof vent.

Good luck.

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Old 09-02-2013, 03:40 PM   #7
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Eternabond Tape.
That's what I was thinking....don't know if it would work though...
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Old 09-02-2013, 03:55 PM   #8
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Old 09-02-2013, 04:09 PM   #9
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I can't get it down . I unbolted it took the drain pipe off still only comes down 1/4 in. Any ideas?
Assuming the toilet is unbolted, how about the vent pipe to the roof?
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Old 09-03-2013, 10:36 PM   #10
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I actually did the same thing when I first bought my 5th wheel. The tank filled and the water went out through the vent. luckily was brand new unit so the tank had not really had time to get dried material in it

AS far as the crack goes. I have another post about fixing tanks. Auto parts stores sell a epoxy that will fix plastic tanks. my tractor has a plastic tank and I had a crack in the bottom of it. I used the epoxy several years ago and it still does not leak diesel. if the epoxy will fix the bottom of a diesel fuel tank you are probably not going to have a problem with the top of a black water tank
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Old 09-04-2013, 05:51 AM   #11
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That's what I was thinking....don't know if it would work though...
It says on their label and advertisement it will permanently repair tanks.
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