There is a plumber on here, Sewer Ratz I think, and he uses test strips to test for acid in the drain line. When his test strip shows that there is acid in the line, he charges extra. Who needs acid splashing on their skin?
My cables usually turn black in the presence of acid. Acid dis-colors steel by turning it black. Too much and will start to corrode your cables over time making you have to replace them.
That is a cool tool but I don't know about the price.
I saw a drain cleaning tech fish a Triangle shaped piece of 4" pvc out of a drain line with a camera and a spartan retriever conehead. I don't know if some people would make the investment into this tool.
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