John Denhardt, P.E., FSFPE, is vice president of engineering and technical services for the American Fire Sprinkler Association. He is a NICET Level III in automatic sprinkler system layout and inspection/testing of water-based systems, as well as an NFPA Certified Water-Based Systems Professional. Denhardt is a member of NFPA 13 AUT-AAC, NFPA 13 AUT-SSD, and NFPA 14 technical committees and is an SFPE fellow. He can be reached at jdenhardt@firesprinkler.org.