SPECIAL ORDER ITEM. Review Returns Policy before purchase. This 90° concentric elbow provides a reliable solution for routing vent pipes in tankless water heater installations. Designed for use with compatible venting systems, it helps change the vent direction while maintaining proper airflow. Constructed from durable stainless steel, it resists heat and corrosion for long-lasting performance in outdoor and indoor vent assemblies. The push-on connection allows easy installation and forms a secure, leak-resistant seal, supporting efficient and safe vent operation. Perfect for residential and commercial tankless water heater vent configurations.