David A ChasisDavid A. Chasis has been involved in plastic fluid handling products for over 45 years. He is president of Chasis Consulting, Inc., author of the first and second edition books "Plastic Piping Systems" (published by Industrial Press, New York,New York), edited two Plastic Pipe and Fittings Association (PPFA) books: "Thermoplastic Industrial Piping Systems Workbook" and "Design Guide for PVC Piping Systems for Commercial and Industrial Applications", is a member of and consultant to PPFA, author of over 36 published articles on plastics, presenter of dozens of plastic piping seminars and webinars.He can be reached at Chasis Consulting, Inc. dchasis@gmail.com. Read More Read Less