3-Inch concreat wall Vent Duct Adapter

This is a 3D-printed ventilation pipe connector designed for reinforced concrete wall installations. It allows ventilation pipes to pass through drilled holes in the wall, enabling smooth exhaust or airflow. The design is compact and easy to install—simply drill a few holes with a hammer drill to secure it in place. The connector features a standard-sized interface compatible with common ventilation ducts. Reinforced base and joint sections ensure durability and stability. For best results, print with strong and weather-resistant materials such as ABS or PETG to prevent deformation or cracking during long-term use.