The Homewerks Worldwide 1-1/2 in. PVC Threaded Union is used to join lengths of pipe together. Can be used with either Sch. 40 or Sch. 80. Its female-threaded connections allow for convenient dis-assembly of piping without having to make cuts. Rated for 150 psi at 73°F, complies with ANSI B2.1.. Threaded ends. NSF standard 14 for plastic piping system components. Use with Sch. 40 or Sch. 80 pipe. Great do it yourselfer product. Easy installation. Rubber O-ring seal