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If the contractor uses a shark tooth cutter after breaking the choke, the pipes will be clean, not shiny, but all roots and debrie will be gone.
Unfortunatly some contractors will send a cork screw down the line to open the choke, and then tell the owner that if this blockes in the next 6 months the lines will need to be replaced. This is an old con, if the contractor uses a “snake” then ensure they do it correctly
