DuraVent DuraVent 20" Inner Diameter - Type B Round Gas Vent Pipe - Double Wall - 18" Pipe Length

Round Gas Vent Collection Aluminum 18 Inch Length Round Rigid Pipe with 20 Inch Inner DiameterThis Aluminum 18 Inch Length Round Rigid Pipe with 20 Inch Inner Diameter from the Round Gas Vent series is a Type B gas component and consists of the duralock system for a tight seal. To calculate installed length, subtract 1 1/2” (for 10”-16” diameter) and 1 1/8” (for 18”-30” diameter) from each connection of vent. A 1” clearance (air space) to combustible materials must be maintained. 18”-30” diameters are bu...