I'm one of a 5 man crew that cleans all types of underground piping for municipalities . lines are from 3/4 of and inch to 10 ' in diameter like I was telling lonewolf in his neck of the woods we cleaned and hyper chlorinated a potable water line 36" in diameter and 27.458' long that went under two shipping channels and to a water plant in 5 days there is only 3 companies in the US that specialized in our type of cleaning . I'm a senior tech on the crew and we travel all over the United States doing this .
Here is a pic of my son standing next to a 48" diameter pipline " PIG "
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