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Thread: replacing cast iron sewer with plastic

  1. #31
    DIY Junior Member Percussiongod's Avatar
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Size:  74.6 KB Seems like there is a lot of knowledge on this thread. How could I go about removing this piece of cast iron while retaining the wye joint?
    Last edited by Percussiongod; 01-11-2013 at 11:02 AM.

  2. #32
    DIY Junior Member plumber66's Avatar
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    use a grinder and a wafer style cut off wheel to cut the cast. understand that the cast is going to be heavier than it looks. use dwv-drain waste and vent pvc to replace make sure you hang the pipe every 4' and use the proper size fernco couplings to tie the cast and pvc together. there is nothing worse than hearing a cast line crush under the load of a pair of soil pipe snappers. If the pipe was good it probably would not be leaking and then i would say rent a pair of snappers. read the lettering on the pipe you are buying somewhere it is going to say dwv or sch 40 go or even cell core you can use any one but the pipe will be white in color.

  3. #33
    DIY Junior Member plumber66's Avatar
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    looks like copper has been leaded into the cast. if this is copper you can simply cut the copper a few inches away from the lead joint and purchase a fernco type cap that is for the size of copper. make sure the cap is for copper not cast or pvc there is a difference in o.d. size therefor the seal

  4. #34
    DIY Junior Member Percussiongod's Avatar
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    The copper comes straight down from the toilet.

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