The Perolo 1 1⁄2” ATCO™ ball valve is designed to be used as an air inlet or as a fluid inlet/outlet valve. Perfect low-profile airline when dual connection is needed – 1 1⁄2” BSP & 1 1⁄2” NPT. For ground operation, this airline valve allows piping to remain within the frame of the ISO tank container. This airline fits standard airline weld-in flange.