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Key Facts: HI Plumber Exam
70%
Passing Score
Hawaii Board of Electricians and Plumbers
100
Questions
3 hours limit
~$330
Exam Fee
PSI
UPC
Code Base
Hawaii adoption
Hawaii's journeyman plumber exam is based on the UPC (Hawaii State Plumbing Code) and administered by PSI. Hawaii uses the UPC rather than the IPC. The Hawaii State Plumbing Code includes amendments for tropical climate, volcanic soil conditions, and island-specific water systems. The exam requires 70% to pass and tests drainage, water supply, venting, gas piping, and fixture knowledge.
Sample HI Plumber Practice Questions
Try these sample questions to review concepts for the HI Plumber exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 298+ question experience with AI tutoring.
1Under the Hawaii State Plumbing Code (UPC), what is the minimum size of a building sewer?
2Per the Hawaii State Plumbing Code (UPC), what is the minimum slope for a 4-inch horizontal drainage pipe?
3What is the DFU value for a residential water closet (1.6 gpf) under the UPC?
4Per the Hawaii State Plumbing Code (UPC), what is the maximum distance between cleanouts on a horizontal drainage pipe?
5Under Hawaii regulations, what type of backflow preventer is required for a high-hazard cross-connection?
6Per the Hawaii State Plumbing Code (UPC), what is the minimum water supply pipe size for a bathtub with shower?
7What is the maximum water temperature setting for a residential water heater per the UPC?
8Per the Hawaii State Plumbing Code (UPC), what is the minimum trap seal depth for a standard plumbing fixture?
9Under the Hawaii State Plumbing Code (UPC), what is the minimum vent pipe size?
10Per the Hawaii State Plumbing Code (UPC), what is the maximum static water pressure in a building distribution system?
About the HI Plumber Exam
Hawaii journeyman plumber exam administered by PSI under the Board of Electricians and Plumbers. Based on the Uniform Plumbing Code (UPC) with Hawaii State amendments. Tests drainage, water supply, venting, gas piping, and island-specific requirements.
Exam sponsor: Hawaii Board of Electricians and Plumbers. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
100 questions
Time Limit
3 hours
Passing Score
70%
Reported exam pass rate: ~50-60%. This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Drainage & Waste Systems
Drain sizing, DFU calculations, slope requirements, cleanouts per UPC
Water Supply & Distribution
Pipe sizing, backflow prevention, water heaters, pressure regulation per UPC
Venting Systems
Vent sizing, wet venting, AAVs, vent termination, circuit venting per UPC
Gas Piping
Gas pipe sizing, appliance venting, pressure testing, BTU calculations per IFGC
Fixtures, Materials & Hawaii Code
Fixture installation, materials, joints, permits, inspections, and Hawaii-specific requirements
Preparing for the HI Plumber Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 3 hours
- Exam / certification fees: ~$330 Official sources
Using Our Practice Resources
- Work through all 298 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
HI Plumber: Suggested Study Strategy
Frequently Asked Questions
What code does Hawaii use for the plumber exam?
Hawaii uses the UPC (Hawaii State Plumbing Code). The exam covers drainage, venting, water supply, gas piping, and fixture requirements as adopted by the state.
Who administers the Hawaii plumber exam?
The exam is administered by PSI under the Hawaii Board of Electricians and Plumbers.
How many questions are on the Hawaii plumber exam?
The Hawaii plumber exam has approximately 100 questions with a 3 hours time limit. A score of 70% is required to pass.
Is the HI plumber exam open book?
Most PSI-administered plumber exams allow a bound copy of the adopted code. Check with the Hawaii Board of Electricians and Plumbers for approved reference materials.