The 1-1/4" slip x 1-1/2" fip brass trap adapter is a plumbing fitting designed for tubular drain applications. it features a full flow waterway with smooth, uniform internal surfaces to facilitate drainage. constructed from brass with a zinc nut, this adapter provides a connection between a slip-joint and a female pipe thread (fpt). the clean, uniform threads allow for threaded connections and reduce the potential for cross-threading during assembly. this adapter is suitable for various plumbing configurations requiring a transition between different pipe sizes and connection types. the brass finish provides a standard appearance for plumbing installations. this fitting is specifically engineered for use in residential or commercial plumbing systems where a transition from a 1-1/4" slip-joint connection to a 1-1/2" female pipe thread is required. the brass construction offers structural integrity for drain pipe assemblies, while the included zinc nut secures the slip-joint connection. the uniform internal surfaces are designed to maintain consistent flow rates within the drainage system, minimizing debris accumulation. the adapter is compatible with standard tubular drain piping, ensuring a proper fit for common plumbing repairs and new installations.