Installation Instructions are Supplied with Cap and Support
Aluminum (Inner Wall), G90 Galvanized Steel (Outer Wall)
Type B Gas Vent, Double Wall, Round
18 Inch
4 Inch I.D. x 4.5 Inch O.D.
UL 441
400 Deg F
0.012 Inch (Inner Wall), 0.018 Inch (Outer Wall)
Lock Ring
false