Too easy, guys http://www.plasticpipe.org/pdf/tr-19_thermoplastic_pipe_for_transport_of_chemical.pdf Bruce Younger 05G HHC 313 RR Bn 3/67-4/68 Madison, SD sluggo54 at hotmail.com "There is no hunting like the hunting of a man and those that have hunted armed men long enough and liked it, never care for anything else thereafter." E. Hemingway