Arizona
L-4 Boilers, Steamfitting and Process Piping
(Commercial / Dual License K-4)

Apply for the License

Arizona Registrar of Contractors
3838 North Central Avenue
Phoenix, AZ 85012
Phone: (602) 542-1525
Licensing Link

Exam Administrator

PSI Services, LLC
3210 E. Tropicana
Las Vegas, NV 89121
Phone: (800) 733-9267, Fax: (702) 932-2666
Examination Link

Exam Type

OPEN BOOK

Exam Content

Subject Areas	# of Questions
Boilers	10
Steam and Hot Water Piping	6
Gas Piping	6
Burners	5
Controls	5
Flues and Vents	4
Sizing and Estimating	4
Testing and Inspection	4
Process Piping	6

Total Number of Test Questions:	50
Time Allowed (minutes):	120
Passing Percentage:	70%

The state of Arizona also requires that you take and pass a written Business Management exam for this trade.

Part of this exam requires knowledge of business management principles. We offer those study materials on a separate Arizona Business Management web page.

Reference Books Permitted in the Exam

1.	Code of Federal Regulations - 29 CFR Part 1926, Revised as of 2008 or later (OSHA) - OR - Selections as of 2008 by PSI.
2.	International Mechanical Code, 2009, ICC.
3.	International Fuel Gas Code, 2009, ICC.

Reference Books NOT Permitted in the Exam

1.	Low Pressure Boilers, 3rd Edition, 2009, Frederick M. Steingress.
2.	Modern Hydronic Heating for Residential and Light Commercial Buildings, 2nd Edition, 2004, John Siegenthaler.
3.	IPT's Pipe Trades Handbook, 1991, Robert A. Lee, IPT Publishing and Training.

Recommended Study Materials

Arizona • L-4 Boilers, Steamfitting and Process Piping

Product Name	Price
Comprehensive Tutorial
Practice Tests ( 3 )
When you order the products above, they will be sent to you by e-mail (see FAQ page for delivery times). If you prefer the files can be burned on to a CD-ROM disc and sent by USPS mail, you must notify us within 3 days of ordering using the form on our "Contact Us" page.