

The 4" x 18" B-Vent Pipe (Part Number: 4M18) is a high-quality aluminum flue with a galvanized casing, designed for efficient ventilation systems. Measuring 1-1/2 feet in length, this pipe features a hemmed casing and flue for durability. It boasts a positive twist lock connection with a SureLock tab, ensuring a secure installation. Compatible with various brands, this pipe is listed and tested to UL 441 standards.