replying to maradcliff, jdc wrote:
I had the same problem. Roots grew up the OUTSIDE of the toilet drain pipe,
between the slab and the pipe. Then they grew through the wax seal, just like
growing through soil, and then grew down into the pipe, like a horsetail
hanging in the pipe. The plumber had seen this before, but said mine was an
extreme case. Before replacing the wax seal, he packed a paste of coarse
salt around the drain pipe, into the space between the pipe and the slab. I
hope this lasts, but if someone knows a better fix, please le me know.

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