The development of a recommended code of plumbing practice, design, and installation, including the establishment of performance criteria predicated on the need for protection of health and safety through proper design, installation, and maintenance of plumbing systems.
He's helped write, grade and monitor plumbing exams and is a nationally recognized expert both on the code and how to teach code compliance to apprentice and journeyman plumbers. Other books by Mr. Massey are Basic Plumbing with Illustrations , Plumber's Handbook , Plumber's Exam Preparation Guide , and Planning Drain, Waste & Vent Systems .