Selkirk 4" Diameter Adjustable Elbow, Type B Gas Vent Double Wall with Aluminum Inner and Galvanized Outer Casing - 90 Degree Flexibility, 104230

Used when an offset is required to avoid obstructions such as rafters, joists and other construction obstacles. Used to orient pipe between vertical and horizontal orientation. Four piece adjustable elbow twists for easy offsets. Size refers to the inside diameter of the pipe or fitting. The outside diameter of RV is approximately 1/2" Larger. 3" Elbow - 3 Gore; 4", 5", and 6" Elbow - 4 Gore. Type B gas vent.

• Versatile Double-Wall Venting: 4-inch adjustable elbow creates a 90-degree offset to bypass rafters, joists, or other obstacles, ideal for residential and light industrial venting applications.
• Secure & Precision Connection: Four-piece design twists smoothly for precise orientation, while the snap-lock system provides a fast, tight seal without cutting or special fittings.
• Efficiency Meets Durability: Aluminum liner heats quickly to create a strong draft, while the galvanized exterior shields the vent from harsh outdoor elements.
• Quick & Easy Installation: Snap-lock connection allows tool-free setup for an effortless, reliable connection as part of the Selkirk RV Series system.
• Trusted Heritage & Safety First: For nearly a century, Selkirk has led HVAC innovation with durable, efficient, UL-tested products engineered to exceed safety standards.