Guest
Mr. Sylvan, LMP:
Which brand of chain knockers do you use? I would be interesteed in locating a unit that will “drill” through concrete since the ones I have always used are descalers and need an opening through the material before they can break up the obstruction. I assume that the unplugging of the 10″ line was successful, or you gave a performance guaranty that you only charged if you unplugged the line.
