duravent™™ - 4GW12A - Aluminum 12" Length Oval Adjustable Pipe with 4" Inner Diameter

This Aluminum Pipe From The Oval Gas Vent Is A Type B Gas Component That Will Meet The Needs Of Any Type B Installation. Use For Venting Listed Natural Gas or Liquid Propane Category I, Draft Hood Appliances, or Appliances That Have Been Specifically Tested and Listed To Use Type B Gas Vent. The Appliances Listed Typically Use Type B Gas Vent Systems, But Not Always: Furnaces, Water Heaters, Boilers, Room Heaters, Decorative Gas Appliances, and Unit Heaters. Designed To Be Placed Within 2 x 4 Stud Walls (4 and 5 Oval Pipe). 6 May Only Be Placed In A 2 x 6 16 O.C. Stud Space.