• Specialty Commercial C-37 This classification allows the licensee to install, alter, and repair all plumbing when performed solely within property lines and not on public easements or rights-of-way, except as hereinafter provided
• Specialty Dual License CR-37 This classification allows the scopes of work permitted by the commercial C-37 Plumbing and the residential R-37R Plumbing licenses.
• Specialty Residential R-37 Installation and repair of water and gas piping systems, fire protection systems, and sewage treatment systems. Included are all fixtures, vents, and devices common to the industry, as well as solar applications. This scope includes all C-37R subclassifications.

1. Meet experience requirements
   • You must have four years of documented experience in the plumbing trade to apply. The most common method of gaining experience is through an apprenticeship program. You can also work under the supervision of a licensed plumber you find on your own.
2. Sit for two exams: business and law and the trade.
3. Pay the $120 exam fee
4. Apply for the C-37 or L-37 license.
5. Obtain the appropriate bond & workers compensation.
   • (Commercial)
     • If your Estimated Annual Volume (Per License Category) is less than $150,000 your current bond will need to be $2,500
     • If your Estimated Annual Volume (Per License Category) is $150,000 or more but less than $500,000 your bond as of July 1st 2014 will be $7,000
     • If your Estimated Annual Volume (Per License Category) is $500,000 or more  but less than $1,000,000 your bond as of July 1st 2014 will be $17,500
     • If your Estimated Annual Volume (Per License Category) is $1,000,000 or more but less than $5,000,000 your bond as of July 1st 2014 will be $25,000
     • If your Estimated Annual Volume (Per License Category) is $5,000,000 or more but less than $1,000,000 your bond as of July 1st 2014 will be $37,500
   • Must carry a Bond (Residential)
     • If your Estimated Annual Volume (Per License Category) is less than $100,000 your bond as of July 1st 2014 will be $4,250
     • If your Estimated Annual Volume (Per License Category) is $100,000 or more but less than $375,000 your bond as of July 1st 2014 will be $4,250
     • If your Estimated Annual Volume (Per License Category) is $375,000 or more your bond as of July 1st 2014 will be $25,000

Plumbing Exam for Residential & Commercial

• Administration, Scope and Intent/Purpose
•  Definitions and Symbols
• Plumbing Math
• General Regulations
• Fixtures, Faucets, and Fixture Fittings
• Water Heaters
• Water Supply and Distribution
• Sanitary Drainage
• Indirect and Special Waste
•  Vents
• Traps, Interceptors, and Separators
•  Storm Drainage
•  Nonpotable Water Systems
• Subsurface Landscape Irrigation Systems
• Appendix E
• Isometrics
• Private Sewage Systems
• International Fuel Gas Code
• Hands-On Practical Application
• Practice Tests

Bonus Materials

• Reading and Understanding the PSI Bulletin
• Books That You Should Have During the Exam
• Effective Study Techniques

Business and Law for Commercial Plumbers

• Articles 1-2: Registar of Contractors and Licensing
• Article 2.1: Residential Contractors’ Recovery Fund
• Article 3: Regulations
• Articles 4-5: Solar, Remodeling and Repair Contractors
• AZ Contractor Workmanship Standards
• Business Organization
• Bidding and Estimating
• Project Management
• Business Math
• Contracts and Agreements
• Risk Managements
• Labor Laws and Employment Regulations
• Financial Management
• Tax Laws
• Lien Laws
• Environmental Laws and Regulations