3" x 4" Adjustable Concentric Termination (12.0"-18.0" Wall Thickness)

The Takagi brand has been discontinued by the manufacturer as of December 31, 2025. Suggested replacement units will be available on our website and replacement parts will continue to be available as supplies last. If you'd like any further assistance, please contact our customer service team.

Note: Takagi-brand venting is now manufactured by Nova Vent (Z-Vent). Tosetz (T-Vent) previously manufactured Takagi venting. This part is a new component in the Z-Vent style. Z-Vent and T-Vent parts are not compatible and should not be used together.

Used when terminating direct-vent systems. For use with Takagi direct-vent models that require a 3" intake and a 4" exhaust. This concentric termination provides the convenience of only having to make one penetration through a sidewall instead of two separate penetrations for the intake and exhaust piping. The louver termination acts as a bird screen, restricting small animals, pests, and foreign objects from entering into the vent system. This sidewall termination is available in three different sizes, to cover all ranges of wall thicknesses.

For Takagi Models:

• T-KJr2-IN
• T-K4-IN
• T-D2-IN