PelletVent has a double wall construction. The outer wall is galvanized steel and the inner is corrosion resistant stainless steel. This increaser will allow the installer to go from 3 in. diameter pipe to 4 in. diameter pipe. This part increases a 3 in. diameter pipe to 4 in. to improve drafting in high altitudeconditions.

　　- Assembled dimension: 4 in. W x 4 in. D x 7 in. H

　　- PelletVent is to be used with wood pellet burning appliances only

　　- Twist lock connections allow for a quick and easy installation

　　- PelletVent has a limited lifetime warranty