Available in diameters 3in to 24in and standard lengths up to 10ft (3in and 4in diameter only). Pipe can be cut to length. The female end of each Z-VENT? component incorporates a Double Fail Safe? self sealing gasket. Examine all components to ensure that gasket integrity has remained during shipping. Gaskets must be in proper position or flue gases could leak resulting in carbon monoxide poisoning. The installation shall be in accordance with the manufacturer?s installation instructions.