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What are the types of plumbing licenses in Connecticut?

P-1 UNLIMITED PLUMBING CONTRACTOR - The holder of this license may do all plumbing and piping work as defined in section 20-330 of the Connecticut General Statutes. The requirements to qualify for this license examination shall be two (2) years as an unlimited licensed journeyperson or equivalent experience and training.

P-2 UNLIMITED JOURNEYPERSON PLUMBER - The holder of this license may do all plumbing and piping work as so defined and only while in the employ of a contractor licensed for such work. The requirements to qualify for this license examination shall be the completion of a registered apprenticeship program or equivalent experience and training.

How do I become a journeyman plumber in Connecticut?

  1. Complete an approved Apprenticeship program or proof of equivalent experience and training.
  2. Apply to the state, pay the $90 fee and pass the P-2 Unlimited Journeyperson Plumber exam through PSI
  3. Complete two years of work as a journeyperson Plumber
  4. Apply to the state, pay the $150 fee and pass the P-1  Unlimited Plumber exam and Business and Law Exam through PSI

What can I expect from the Connecticut master plumber tests?

Master Plumbers must pass the P-1 Unlimited Plumber exam and Contractor Business and Law exam through PSI. The test will consist of the following sections:

P-1 Exam
Number of Questions: 80-Multiple Choice
Time Allowed: 3 Hours
Amount Correct to Pass:  70%

  • 4 Questions - General Plumbing Regulations
  • 9 Questions - Gas Systems
  • 4 Questions - Cleanouts
  • 5 Questions - Fixtures and Equipment
  • 2 Questions - Water Heaters
  • 3 Questions - Piping, Valves, Controls
  • 6 Questions - Water Supply
  • 3 Questions - Hangers and Supports
  • 14 Questions - Drain, Waste, and Vent
  • 3 Questions - Backflow
  • 4 Questions - Traps and Interceptors
  • 2 Questions - Developed length
  • 9 Questions - Isometric Analysis
  • 3 Questions - Joints and Connections
  • 6 Questions - Safety and Excavation
  • 3 Questions - Water Treatment

Business & Law Exam
Number of Questions: 50-Multiple Choice
Time Allowed: 2 Hours
Amount Correct to Pass:  70%

  • 5 Questions - Licensing
  • 7 Questions - Estimating and Bidding
  • 2 Questions - Lien Law
  • 4 Questions - Financial Management
  • 5 Questions - Tax Laws
  • 5 Questions - Labor Laws
  • 5 Questions - Project Management
  • 6 Questions - Contracts
  • 2 Questions - Business Organization
  • 4 Questions - Risk Management
  • 5 Questions - Environmental and Safety

Here is a link to the psi exam outlines for the plumbing exam. This will give you all the information you need about the exam procedures.

What can I expect from your master plumber exam prep?

Plumbing Exam

  • 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

Business and Law

  • Licensing
  • Estimating and Bidding
  • Lien Laws
  • Financial Management
  • Tax Laws
  • Labor Laws and Employment Regulations
  • Project Management
  • Contracts and Agreements
  • Business Organization
  • Risk Management
  • Environmental Safety
  • Safety and Excavations

Bonus Materials

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

What code is the Connecticut plumbing test based on?

2012 International Plumbing Code

Are Connecticut plumbers tested on Law Rules and Regulations?

Yes, Only Master (Unlimited Plumbing Contractor)

Where can I take the Connecticut plumbers license exam?

Select the license you are pursuing from this page. Enter your zip code at the bottom of your license page to find the nearest location.

 What are the examination fees for the plumbers’ license in Connecticut?

  • P-1 Unlimited Plumbing Contractor – $130.00
  • CT Contractor Business and Law – $65.00
  • P-2 Unlimited Journeyperson Plumbing Contractor $130.00

What are the plumbing licensing fees in Connecticut?

  • Plumbing & Piping Limited Contractor - $150
  • Plumbing & Piping Limited Journeyman - $120
  • Plumbing & Piping Unlimited Contractor - $150
  • Plumbing & Piping Unlimited Journeyperson - $120

What should I bring to the Connecticut plumber exam?

  • State ID or Driver’s License
  • A standard calculator
  • All approved reference material
  • A writing utensil


  • International Plumbing Code IPC 2012 or 2015, and/or IPC Commentary 2012 or 2015
  • NFPA 54: National Fuel Gas Code or National Fuel Gas Code Handbook 2012
  • NFPA 58: Liquefied Petroleum Gas Code
  • Code of Federal Regulations – 29 CFR Part 1926 OSHA
  • Water Processing: Residential, Commercial, Light Industrial 3rd Edition, 2000, Wes McGowen
  • NFPA 56: Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable Gas Piping Systems

Books that are recommended by PSI for Study, but are not allowed into the exam

  • Mathematics for Plumbers and Pipefitters, Lee Smith, 8th Edition
  • Plumbing Design and Installation, L.V. Ripka

How do I know if I passed the Connecticut plumber exam?

PSI will inform you if you passed or failed the exam on your exam date.

Are there accommodations for individuals with special needs during the plumbing licensing exam?

All examination centers are equipped to provide access in accordance with the Americans with Disabilities Act (ADA) of 1990, and exam accommodations will be made in meeting a candidate’s needs. Applicants with disabilities or those who would otherwise have difficulty taking the examination must fill out the form at the end of this Candidate Information Bulletin and fax it to PSI (702) 932-2666. This form also includes out-of-state testing requests.

Is there any way to be waved from the plumbing examination?


If I am licensed in another State, do I still have to get a Connecticut Plumbing License?


How often do I have to renew by plumbing license in Connecticut?

Annually on October 31st

What are the renewal fees for Connecticut Plumbers?

  • Plumbing Contractors -$150.00
  • Journeyperson - $120.00

Do I need continued education or an update course to renew my license?

Continuing Education is not required to renew your plumber's license

Who do I contact regarding a plumbing license in Connecticut?

Department of Consumer Protection
450 Columbus Boulevard, Suite 901
Hartford, Connecticut  06103-1840

Division Phone: (860) 713-6000

Fax: (860) 706-1200

Useful Links

Connecticut Plumber PSI Candidate Bulletin

  • Information Last Updated: 02/2020
  • Did you find incorrect information? Email Us
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