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Thread: jb weld?Toilet tank crack

  1. #1
    Consultant cwhyu2's Avatar
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    Default jb weld?Toilet tank crack

    10 min ago went past the bathroom and heard water running onto the floor.
    Found leak from cracked tank that been patched before. Water to W/C is
    off now.This is rental property and the owner will take days to return my
    call.Has anyone succesfully temporaly patched a crack in a toilet tank?
    JB weld comes to mind.I have never even tried.

  2. #2
    In the Trades Gary Swart's Avatar
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    JB Weld is nothing more than epoxy. It may provide a temporary repair (or not) but a broken tank is final. You will need a new toilet. Your landlord is required to provide a functioning toilet. I would imagine this is an old full flow, so he is stuck with a new low flow.

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
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    Gary is right. it's time to shop for a new one.

    If you try to fix a cracked tank, and it gives out while you are at work, the bill could be in the tens of thousands.

  4. #4
    Consultant cwhyu2's Avatar
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    I will only turn it on when needed and off at all other times.Like I said the owner is Iwon`t use the words. thanks guys!

  5. #5
    Plumber Cass's Avatar
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    I have used JB a few times and when I am spanning a crack what I do is to coat a piece of paper on both sides with the JB...be sure the paper extends at least 1" beyond the crack every where...then apply it and smooth it with a disposable putty knife...

  6. #6
    Consultant cwhyu2's Avatar
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    Just going to dump a bucket water in the bowl for now.thanks again for the
    info

  7. #7
    Plumber Sandpiper Plumbing's Avatar
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    I've had customers break pieces off tanks before and I've adhered them back on with a 30-minute two-part epoxy.

  8. #8
    Consultant cwhyu2's Avatar
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    Quote Originally Posted by Sandpiper Plumbing View Post
    I've had customers break pieces off tanks before and I've adhered them back on with a 30-minute two-part epoxy.
    Thanks W/C is being replaced saturday afternoon.

  9. #9

    Default Sealing a tank with silicone

    About ten years ago I noticed my toilet tank leaking~a crack in the back of it, don't ask how it got there that's a mystery. I emptied the tank and dried it up and put a bead of silicone on the inside~waited 24 hours and put a second bead over it. the next day I filled the tank and it hasn't leaked a drop all these years. Just a little tip for anyone with a mystery crack....

  10. #10
    Master Plumber Dunbar Plumbing's Avatar
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    Nothing in my career of plumbing involves JB weld.

  11. #11
    Forum Admin, Expert Plumber Terry's Avatar
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    Just a little tip for anyone with a mystery crack....
    Great idea, tube of Silicone $5.99

    Cost to repair the home if it gives out while you are at work, up to $100,000.00 in damages.

    Los Vegas baby. I guess you like to gamble.



    This tank is 34 years old. Would you want to Silicone this one too?
    Notice the nice mold on the bottom of the tank.
    Last edited by Terry; 03-08-2009 at 03:05 PM.

  12. #12
    In the Trades Gary Swart's Avatar
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    Heck yeah! Don't need no stinking new turlet, this one's been fine for 40 years! Why shoot, my daddy used it, and what's good enuf fer dad is good enuf fer me. Why shoot, Billy Mays swears by this stuff to fix anything. Cain't afford a new turlet no how, gotta make the payments on my RV. Pass me that there sillycone.

  13. #13
    DIY Senior Member achutch's Avatar
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    My next door neighbor found a crack inside the tank of her second floor toilet that ran the entire length where the floor of the tank meets the back wall, and partially up the right side.

    She made the right decision and replaced the toilet.

    We advised everyone in our annual condo association meeting to inspect the insides of their tanks, especially those people who had the original toilets installed in 1986.

    If that tank had broken, there would have been major damage in my neighbor's unit, as well as in mine as that toilet is on the other side of the wall where my computer room is.

    I have seen what a major leak can do. In 1985, I was living in a new 3 unit apartment building. The washers were on the second floor. I had one end unit. My washer was brand new and professionally installed. The tenant in the opposite end unit installed a used washer with used hoses. She left with the water turned on, a hose burst, and the entire building got flooded; my first floor having at least an inch of water in it. Then, when I arrived home to find all my furniture out on the lawn, the tenant whose machine had caused the flood was out on the lawn sipping on a glass of wine and tee-heeing that it was "just one of those things"!!!

    I would rather spend money on a new toilet and correct installation of water using equipment than risk a flood!

    achutch, nice and dry in Vermont

  14. #14
    Consultant cwhyu2's Avatar
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    Toilet was replaced,but all the info is great stuff.Nobody wants to come
    home to a waterfall.

  15. #15
    Plumber Cass's Avatar
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    Of all the epoxys I have use for various things JB Weld is about as good as it gets...when applied correctly it works well...

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