Michael Cox serves as sales and marketing manager for 13dPEX.com, a design and distribution company in Bellingham Washington, dedicated to NFPA 13d sprinkler systems. This firm supplies design, tools, pumps, and installation materials to plumbers and others who are contracting to install 13d systems. Specializing in multipurpose or flow through design using PEX tubing as a primary material. He has worked in life-safety and fire prevention for more than two decades, holds a Washington State certificate for sprinkler design, and has worked with AHJs and Fire Chiefs through out the state. He is currently teaching a seminar program designed to prep plumbers and others to get their state certification. View Articles