The Selkirk 4" Adjustable Elbow (Model 104230) is a durable Type B gas vent fitting designed for safe and efficient venting in residential and light commercial HVAC systems. Featuring a double-wall construction with an aluminum inner liner and galvanized outer casing, this elbow provides reliable heat performance and long-lasting corrosion resistance. Its 90-degree adjustable, four-piece design allows smooth offset installation around rafters, joists, and other structural obstacles.

Built for quick, tool-free installation, the snap-lock system ensures a secure, airtight connection as part of the Selkirk RV Series venting system.