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Thread: Cast iron Connection Problem

  1. #1
    DIY Junior Member
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    Default Cast iron Connection Problem

    I have a Cast Iron Vent Stack that the Kitchen sink assembly connects into. The problem is the horizontal drain pipe that connected into the sink was cracked next to the vent stack connection. I can not remove the threaded nut that attached the original horizontal pipe (took the broken pipe out but not the nut) to the vent stack. It is tucked into a concrete block wall and the pipe wrench can't get a grip. Any suggestions?

    I have tried penetrating compound....Attaching a pvc pipe with epoxy. I put a torch to it but no help. I'm out of options. I've attached some pics.
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  2. #2
    In the Trades Gary Swart's Avatar
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    I appears to me that you have reach the point that you need professional help. We DIYers have to realize that there is a point where our individual skills, tools, and know-how stop and it is time to set our egos aside and call in the Cavalry.

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
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    If it's a threaded connection, it should come out.

    It may take a lot of muscle though

    Sometimes warming the tee helps.

  4. #4

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    Use a bigger pipe wrench. It will come out. Try applying heat from the inside with your torch. You can always cut it out and just get another sanitary tee. good luck
    Thanks,
    Taylor Allen
    Website: http://www.rtaplumbing.com

  5. #5

    Smile

    It looks like a trap adaptor which used to be soldered in. You can use a sawzall or hack saw blade and cut out a section of the threaded piece from the inside. Put the saw blade inside the fitting and cut straight down through the threads until you hit the cast iron. Then move around about a half inch and make a similar cut. Then pry out the little piece you just cut and you'll be able to spin out the rest of the adaptor.

  6. #6
    Moderator & Master Plumber hj's Avatar
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    Default pipe

    It is a solder bushing for a tubular trap. Remove the vestiges of the trap by heating the solder and pulling the piece out. Then make two cuts, about 1/8" apart through the brass and remove the sliver between the cuts. Then use a chisel to fold the brass together to close up the slot, and it will unscrew, probably by hand.

  7. #7
    Illinois Licensed Plumber SewerRatz's Avatar
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    I run into them solder bushings all the time I use a caping chisel to remove them with out damaging the tee or the threads.

  8. #8
    35 YEAR MASTER PLUMBER AND DRAINMAN JERRYMAC's Avatar
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    Exclamation Cast iron problem

    I USE A RIGHT ANGLE PIPE WRENCH BY

    http://www.perfectoproducts.net/inde...le-pipe-wrench

    IT WORKS EVERY TIME !

    35 YEAR MASTER PLUMBER AND DRAINMAN

    JERRYMAC@UTAHWEB.COM

  9. #9
    Moderator & Master Plumber hj's Avatar
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    Default wrench

    Then you haven't broken the outlet of the tee off yet?

  10. #10
    Illinois Licensed Plumber SewerRatz's Avatar
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    Quote Originally Posted by hj View Post
    Then you haven't broken the outlet of the tee off yet?
    Never with my cape chisel. I always have had good luck with it caving in the pipe or fitting I wanted to remove with out blowing out the tee.

  11. #11
    In the Trades ilya's Avatar
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    I'm not a longtime pro, but dcelites method has always worked for me. Make sure the two cuts are NOT a "pie wedge" or it'll never come out. I always try to do the opposite-my two cuts are closer together at the threads. Then knock it out w/ a chisel, and unscrew. Once or twice I've had to repeat the process on the opposite side of the fitting,cutting it in two. Then a tap w/ the chisel knocked each half loose.
    not a licensed plumber

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