I've got a stoppage in a 2" PVC stack for a powder room lav that looks like there was a bag of steel nuts dropped into the pipe maybe during construction in the past. They hung up in the 1/4 bend at base and have oxidized or rusted into a pretty solid mass. There were a couple of pieces on the downstream side that clued us in as to what is looks to be. We've hammered this with K-60 with different heads, jetted, still not breaking it up. Wondering if anyone has any ideas. We've thought about acid possibly, but not too familiar with what might work there. Any suggestions would be appreciated.
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Steel nuts in PVC