Z-Vent Single Wall Pipes are available in diameters 3 Inch to 24 Inch and standard lengths up to 10 ft (3 Inch and 4 Inch 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 manufacturers installation instruction.