Reply by MrRon

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Posted on Your worst day on the job?

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5943 posts in 4129 days

#1 posted 07-18-2019 08:37 PM

I had water seeping up through a slab-on-grade. It was warm water. I tore up the concrete and found a copper hot water pipe that was badly corroded and a steel nail embedded in the pipe. It appears that when the house was built, the carpenter threw old nails and other debris on the ground before the slab was poured. Electrolysis between dissimilar metals in damp ground caused the corrosion; had to re-plumb the line through the attic.

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