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Colorado Residential Plumber

Plumbing work is regulated at the state level, and in some cases ,the local level.


Experience requirements exist for each classification.

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Required Books 

The reference listed below are used in the seminar are are the basis for exam questions. 

All exam questions are consistant with the 2018 IPC and the 2018 IRC. These are provided at the testing center. It is your responsibility to know and be able to use basic plumbing theory formulas since such knowledge may be required to work problems in the job task are if the exam entitled Job Task X: Calsulations

Formulas will not be provided to you at the test center and are not allowed in during the test.



Add All Required Books to Cart ($305.95)

Pre-Approval from the Board is required to sit for the exam.  Examination and experience requirements exist for Master, Residential & Journeyman Plumber applicants.

Applicants for Residential Plumber must verify 2 years (3,400 hours) of practical experience.

Letters of Verification: The applicant must verify the plumbing installation experience by submitting an Affidavit of Experience Form from current and former exployers (Plumbing Contractors)

Examinations are administered in English only through a private testing agency. Once approved by the Board, a letter of acceptance and information on testing will be provided.

Plumbing work is regulated at the state level, and in some cases ,the local level.

Experience requirements exist for each classification.

Applications and licensing information for plumbing can be obtained from:

Division of Professions and Occupation

1560 Broadway, Ste 1350

Denver, CO 80202

303-894-7800

https://dpo.colorado.gov/plumbing

Important Contacts

Applications & information for Electrical & Plumbing licenses may be obtained from:

State Electrical Board OR Examining Board for Plumbers
1560 Broadway, Ste 1350
Denver, CO 80202
303.894.2310
303.894.7800 fax
The State Testing Agency is PSI


PSI Licensure: Certification
ATTN: Examination Registration GA
3210 E Tropicana
Las Vegas, NV 89121
(800) 733-9267

Reciprocal Plumbing licenses, in some cases, may be obtained by endorsement. For endorsement information, contact the board.
Colorado does not currently require Plumbing Continuing Education. This is subject to change. Contact the Board for specific license inquiry.

PSI is the testing agency.

All exam questions are consistant with the 2018 IPC and the 2018 IRC. These are provided at the testing center. A review of plumbing theory and common formulas is advised.  It is your responsibility to know and be able to use basic plumbing theory formulas since such knowledge may be required to work problems in the job task area of the exam entitled- Job Task X: Calculations

Formulas will not be provided to you at the test center and are not allowed in during the test.

The Journeyman exam has 100 scored questions with 240 minutes to complete. 70% is required to pass (Up to 10 non-scored items (30 minutes)

Content area includes Water Supply & Vents, Sanitary Drainage Systems, Traps, Fire Sprinkler Systems, Piping Support and System Protection, Water heaters and more.

American Contractors Exam Services offers an intensive one-day seminar to prepare for the Colorado Residential Plumber exam. American Contractors has been successfully preparing individuals for contractor license exams for more than 22 years. Sign up today for the Colorado Journeyman Plumber Exam Preparation Seminar.