Handheld Jr. Hydra-Stopper makes pressure taps and line stops on water and wastewater lines, ensuring fire protection and continued service. It temporarily blocks flow of water in pipes from ¾-2 in. Rated to 100 psi, system is used for cast iron, asbestos cement, steel pit cast, ductile iron, plastic, and copper pipe. It can also be used to add service connections, chemical injection points, lateral lines, and tank connections ranging from ¾-2½ in.