TANK OVERHEAD LINE LIQUID BACKFLOW RESTRICTION DEVICE

A device for restricting liquid backflow through an overhead line on a tank and a method of using the device are provided. The device has a tubular housing with spaced internal baffle plates. The device is secured in place in the interior of an overhead pipe on the top of a tank on a tank truck or other vehicle used for transporting bulk liquid cargo. The device prevents liquid backflow from entering overhead piping due to sloshing action of the liquid during transport. The device allows air to flow through the device so that air may be supplied to the tank, as well as vented from the tank, through the device. 1. A device for restricting liquid backflow through an overhead line on a tank , wherein the device is configured to removably secure the device in a fixed position within an interior of a pipe , said device comprising a tubular housing and a plurality of baffle plates disposed within an interior of the housing , wherein each baffle plate has at least one aperture therethrough.2. The device of claim 1 , further comprising a flange sized to removably secure the device in a fixed position within an interior of a pipe.3. The device of claim 1 , wherein the device has flexible supports for removably securing the device in a fixed position within an interior of a pipe claim 1 , wherein the supports are attached to an exterior surface of the tubular housing claim 1 , and wherein the supports are resiliently biased in an outward radial direction.4. The device of claim 1 , wherein the at least one aperture of one of the plurality of baffle plates is not longitudinally aligned with the at least one aperture of an adjacent baffle plate.5. The device of claim 1 , wherein the tubular housing comprises a plurality of detachable segments configured to secure to each other to form the tubular housing.6. The device of claim 5 , wherein adjacent segments comprise interlocking male and female members.7. The device of claim 1 , further comprising an end cap configured to ...