1/2 x 1/4 Female Pipe X Female National Pipe Straight Mechanical 90 Union Swivel ElbowThe 1 2 x 1 4 Female Pipe X Female National Pipe Straight Mechanical 90 Union Swivel Elbow is a 90 degree elbow pipe fitting that connects pipes at a right angle, with one side having Female Pipe Thread (FPT) and the other side having Female National Pipe Swivel Male (FNPSM). The union design allows for easy disconnection and re connection, while the swivel function offers flexibility during installation, allowing for adjustments without the need to