Abstract: A shut-off device for a pipe in a pipeline and responsive to ingress of water, has at least two valves for installation in the pipe of the pipeline. Each valve has a valve member supported for movement between an open position when the valve is open for passage of a fluid through the pipe, and a closed position when the valve is closed for preventing passage of the fluid through the valve. The device includes a buoyant member associated with the valve members for causing movement of the valve members to the closed positions upon ingress of water to the buoyant member. The valve members are moved to the closed positions in respective upstream and downstream directions of passage of the fluid through the pipe.

Abstract: A shut-off device for a pipe in a pipeline for operation in response to ingress of water, has a valve for installation in a pipe of the pipeline. The valve has a valve member moving between an open position, when the valve is open, to permit passage of fluid through the pipe, and a closed position, when the valve is closed, to shut off a passage extending through the pipe. A buoyant member associated with the valve member moves the valve member to the closed position automatically in the presence of ingress water in the vicinity of the buoyant member.

Abstract: A shut-off device for a pipe in a pipeline for operation in response to ingress of water, has a valve for installation in a pipe of the pipeline. The valve has a valve member moving between an open position, when the valve is open, to permit passage of fluid through the pipe, and a closed position, when the valve is closed, to shut off a passage extending through the pipe. A buoyant member associated with the valve member moves the valve member to the closed position automatically in the presence of ingress water in the vicinity of the buoyant member.

Abstract: A pipe fitting includes a hollow body and at least one open end for connection to a pipe fitting, the end including internal screw threads. The end includes an integral extension collar which has an inner diameter larger than the screw threads for surrounding unused trailing screw threads of a pipe joined to the fitting and forming an annular gap for holding a sealing compound. The collar has a wall of a comparable thickness to the and an outer diameter larger than the body of the fitting.