Years ago a hospital near me needed to have all the pipes in the 100 plus year old hospital replaced. One company bid the job for free in return for scrapping out the old pipes. Everyone thought they were crazy. However, the radiology department was on the 6th floor. The 6 inch pipe from there to the basement was down to less than half an inch due to all the silver from the xray developing. That is a lot of silver. They made a fortune. Sometimes, some labor for scrap is worthwhile.
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