PSI North Carolina Plumbing, Class II Contractor

PSI North Carolina Plumbing, Class II Contractor

North Carolina Administration Code and Policies, 2018 Edition 

North Carolina Residential Code, 2018 Edition  

North Carolina Licensing Board for General Contractors ‐ July 2020 or July 2021 Edition

NASCLA North Carolina Business, Law & Project Management - Plumbing, NC HVAC, 6th Edition