A common cause of sewer blockages, is where an earthenware inspection cap has failed, leaving a 100mm diameter hole in the roof of the pipe. Tree roots will return within months, causing recurring blockages. Traditional excavation methods are messy, expensive and dangerous. Pipe Hunter’s vacuum excavation eliminates the usual problems, removes the tree roots and gives a new inspection point by raising a shaft to surface. Inspection shafts are installed from ground level, quickly and easily using our vacuum excavation method.