SeeSnake microDrain D65S system allows contractors to do precise inspections in lines up to 3 inches wide. Capable of navigating 1 1/2-inch pressurized lines and taking 90-degree turns, the system features a 65-foot flexible cable and a 22 millimeter-diameter camera head, which shows leaks or blockages in plumbing, ducts, or chimneys. Cost: $2,600. Ridgid. 800-474-3443.