![]() Installer 1 exam, also requires the following code book for reference :Ģ009 Uniform Plumbing Code, International Association of Plumbing and Mechanical Officials, (800) 854-2766, NM Manufactured Housing Division Rules & Regulations ( or call 1-800- 733-9267)įor more information on PSI Examinations Click Here PSI Testing Study Reference Material Manufactured Home Procedural and Enforcement Regulations (PSI) and pass with a minimum score of 70 percent.
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