I am building a house in PA in a municipality that requires a 13D system. I spoke to a neighbor today and he told me the township requires a certified installer for these systems. He also told me the insurance for a fire sprinkler installer is very expensive. I spoke to a supplier that sells all of the components and he indicated that I could install a 13D system myself (meaning with helpers that are not certified). I see an online NFPA course for $249.95 and a 3 day classroom course for $1,579. Do these courses make you "certified" for the installation of a 13D system. I am not in the contracting business. I'm just building my own home. Can I install a system myself with helpers? How would I become a "certified" installer?