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How to remove plaster of paris (hardened) from a PVC pipe ? The empty electrical condute (3/4" Pipe) embeded in the floor & 18" elevated on wall. Before the cabels to be pulled out some mischieff poured the plaster of paris in those pipes & those been blocked. The floor & wall is been finished with tiles. Now i have to remove the plaster of paris from the pipe then only i can run the cables thru the pipe.

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You can disolve plaster of paris with an acid.
I would try something weak to begin with like vinegar.
Pour some in the pipe and let it sit.
I'd then use a drill driven pipe snake to try to break it up

Good luck

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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