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2026 Statistics

Key Facts: ME Plumber Exam

70%

Passing Score

Maine Plumbers' Examining Board

~80

Exam Questions

PSI exam format

3 hrs

Time Limit

PSI

IPC

Code Base

Maine adoption

The Maine journeyman plumber exam is administered through PSI and overseen by the Plumbers' Examining Board. The exam has approximately 80 multiple-choice questions with a 3-hour time limit, requiring 70% to pass. Maine uses the International Plumbing Code (IPC). The total exam fee is approximately $221 ($200 application + $21 PSI fee).

About the ME Plumber Exam

Maine journeyman plumber licensing exam administered by PSI and overseen by the Plumbers' Examining Board. Based on the International Plumbing Code (IPC) covering drainage systems, water supply, venting, fixtures and appliances, gas piping, materials, and code administration. Approximately 80 multiple-choice questions with a 3-hour time limit.

Questions

80 scored questions

Time Limit

3 hours

Passing Score

70%

Exam Fee

$221 (Maine Plumbers' Examining Board)

ME Plumber Exam Content Outline

25%

Drainage Systems

Drain pipe sizing, DFU calculations, slope requirements, cleanouts, building sewers, indirect waste, and special drainage systems per IPC

20%

Water Supply Systems

Water pipe sizing, WSFU calculations, backflow prevention, pressure regulation, water heaters, cross-connection control, and potable water protection

20%

Venting Systems

Vent sizing, wet venting, circuit venting, air admittance valves, vent termination, combination waste and vent, and trap seal protection

15%

Fixtures & Appliances

Fixture installation requirements, clearances, accessible fixtures, commercial fixtures, water closets, lavatories, showers, and bathtubs

10%

Gas Piping

Gas pipe sizing, BTU calculations, appliance venting, pressure testing, combustion air, and fuel gas code compliance

10%

Code Administration & Materials

Permits, inspections, plan review, approved materials, pipe materials, joint methods, hangers and supports, and Maine-specific regulations

How to Pass the ME Plumber Exam

What You Need to Know

  • Passing score: 70%
  • Exam length: 80 questions
  • Time limit: 3 hours
  • Exam fee: $221

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

ME Plumber Study Tips from Top Performers

1Study the IPC thoroughly — learn to navigate the index and tables quickly for the open-book PSI exam
2Master DFU calculations and drain pipe sizing using IPC fixture unit tables
3Practice vent sizing and understand when wet venting, circuit venting, and air admittance valves are permitted
4Memorize minimum pipe sizes for common fixtures and trap arm distances
5Review backflow prevention device selection based on hazard level
6Study water heater installation requirements including T&P relief valve discharge
7Practice gas pipe sizing calculations using BTU input ratings and pipe length tables
8Focus on Maine-specific plumbing regulations and any state amendments to the IPC

Frequently Asked Questions

How hard is the Maine journeyman plumber exam?

The Maine journeyman plumber exam is moderately challenging with an estimated 55-65% pass rate. The exam has approximately 80 questions based on the IPC and requires 70% to pass. Strong knowledge of pipe sizing, DFU calculations, and venting requirements is essential.

What plumbing code does Maine use?

Maine uses the International Plumbing Code (IPC) for its journeyman plumber exam. A clean, bound copy of the IPC is typically allowed as a reference during the PSI-administered exam. Check with the Plumbers' Examining Board for the current adopted edition.

How much does the Maine plumber exam cost?

The Maine journeyman plumber exam costs approximately $221 total — $200 for the application fee to the Plumbers' Examining Board plus $21 for the PSI exam fee. Additional costs include the IPC code book. Check with the Board for the current fee schedule.

What are the experience requirements for Maine journeyman plumber?

Maine requires completion of a plumbing apprenticeship or equivalent experience under a licensed plumber. Contact the Maine Plumbers' Examining Board for detailed eligibility requirements, approved experience documentation, and application procedures.