Selkirk 3RV-HWT – 3″ High Wind Top. Used in high wind environments. Improves flue gas flow to prevent downdrafts. 3″ X 8″ X5.5.5″. Size refers to the inside diameter of the pipe or fitting. The outside diameter of RV is approximately 1/2” larger. Outer material is 28 GA galvanized steel. Inner liner is aluminum.








