The Rheem AP12957A Vent Tube is a high-quality aluminum component designed for efficient venting in gas appliances. Measuring 3.016 inches, this vent tube ensures optimal airflow and compliance with industry standards. Its durable aluminum construction provides resistance to corrosion and high temperatures, making it suitable for various applications. Ideal for use in Rheem gas water heaters, this vent tube is essential for maintaining safe and effective operation. Upgrade your system with this reliable vent tube to enhance performance and longevity.