1-1/4 Female Pipe Thread x Female National Pipe Straight Swivel TeeThe 1 1 4 Female Pipe Thread x Female National Pipe Straight Mechanical Swivel Tee is a T shaped pipe fitting designed to connect three pipes at a 90 angle, with specific connection types for each side. Female Pipe Thread (FPT) on one side for connecting to a male threaded pipe and Female National Pipe Straight Mechanical (FNPSM) on the other two sides for connecting to male threaded pipes, which allows for a flexible and adjustable connection.