Free ICC Journeyman Plumber Practice Test (G25, 2018 IPC)
Practice for ICC’s National Standard Journeyman Plumber exam: questions on the 2018 International Plumbing Code in ICC’s published content areas, with an explanation for every answer.
The discharge pipe from a water heater relief valve must be:
357 original ICC G25 questions · 57 IPC-only · 300 that read the same under the IPC and UPC
ICC journeyman plumber practice questions by content area
ICC’s bulletin gives each content area a share of the G25 exam. Each section has a guide with free sample questions and a free ten-question drill with an explanation after every answer.
Code Definitions and Plan Reading
7 of 70 questions on our ICC G25 mock
The terms both codes are written in: building drain and sewer, traps and seals, vent types, backflow, air gaps and breaks, developed length, plus isometric drawings and scale.
General Regulations, Testing and Plumbing Math
13 of 70 questions on our ICC G25 mock
Protecting pipe from damage, freezing and corrosion, notching and boring framing, hanger spacing, trenching, DWV and water testing, permits and inspections, and the math of grade, offsets and head pressure.
Pipe Materials and Joints
8 of 70 questions on our ICC G25 mock
Copper types K, L and M, soldering and brazing, PVC solvent cementing, threaded steel, no-hub and hub cast iron, PEX fittings, dielectric fittings and lead-free rules.
Plumbing Fixtures
8 of 70 questions on our ICC G25 mock
Water closet and urinal clearances, shower size and valves, trap sizes by fixture, dishwashers and disposers, floor drains, overflows, setting and sealing fixtures, and flow limits.
Water Heaters
4 of 70 questions on our ICC G25 mock
T&P relief valves and their discharge piping, pans, garage installations, shutoff valves, thermal expansion, combustion air, vent connectors and gas connections.
Water Supply and Distribution
10 of 70 questions on our ICC G25 mock
Air gaps, vacuum breakers, RP and double check assemblies, cross connections, pressure-reducing valves, water hammer, service and valves, disinfection and pipe sizing.
Sanitary Drainage
9 of 70 questions on our ICC G25 mock
Slope, drainage fixture units, change-of-direction fittings, cleanouts, sizing, sumps and ejectors, backwater valves, indirect waste and building sewers.
Vents
5 of 70 questions on our ICC G25 mock
Why every trap is vented, vent rise and grade, vent sizing, terminals near openings and on roofs, common and wet vents, stack vents and vent stacks, and air admittance valves.
Traps, Interceptors and Separators
5 of 70 questions on our ICC G25 mock
Trap seal depth, prohibited traps, how seals are lost, trap primers, shared traps, and grease, oil, lint and sand interceptors.
Storm Drainage
1 of 70 questions on our ICC G25 mock
Where storm water may go, leaders and conductors, sizing by rainfall rate, secondary roof drains, subsoil drains and sump discharge.
Fuel Gas Piping
Not on G25 · 19% of ICC’s G28 exam with gas
Natural gas and LP gas, approved and prohibited materials, shutoff valves, sediment traps, testing and leak checks, CSST bonding, connectors and sizing.
ICC Mixed
Every G25 content area
Ten questions across the G25 outline on the 2018 IPC, including storm drainage.
Ready for the full exam?
70 four-option questions in 4 hours, drawn across every section, scored against the 70% pass mark with a score for each section and an explanation for every answer.
Or start with the free ICC G25 drillThe ICC G25 journeyman plumber exam at a glance
Answer questions on the 2018 International Plumbing Code in ICC’s content-area shares, read the explanation and code section for every answer, then take a timed 70-question, 4-hour practice exam scored against 70% (49 correct).
- Exam
- ICC G25 National Standard Journeyman Plumber, from the International Code Council (ICC)
- Format
- 70 four-option multiple-choice questions, open book, 4-hour time limit, at Pearson VUE
- Code
- 2018 International Plumbing Code
- Content
- Administration and General Regulations 40%, Plumbing Fixtures 17%, Water Supply and Distribution 14%, Sanitary Drainage 13%, Vents 7%, Traps, Interceptors and Separators 7%, Storm Drainage 2%
- Passing score
- ICC: most contractor and trades exams require 70% correct; check your licensing agency, which may set its own minimum
- Fee
- $120 at Pearson VUE
- Retakes
- Wait 10 days before retaking a failed exam
Where the ICC exam fits
- Ask your licensing agency which exam it accepts; ICC says its results may satisfy an agency’s testing requirement but do not guarantee a license.
- Register and schedule the G25 exam with Pearson VUE ($120).
- Bring the approved reference (the 2018 IPC) and know it well: ICC warns there is no time to look up every answer.
- Results are available right after the exam. If you fail, wait 10 days before retesting.
Studying for another trade license too? Our journeyman electrician practice test covers the NEC exams by state.
How to use this journeyman plumber exam prep
- Take the free ICC mixed drill to see where you stand.
- Start with definitions: TSBPE’s review course says the exam uses only correct code terms.
- Drill the big sections next: general regulations, fixtures, water supply and sanitary drainage carry most of G25.
- Practice with your code book open, as on the real exam, but aim to answer most questions without it.
- Take the full practice exam under the clock, drill your two lowest sections and take it again. Each new sitting draws questions you have not seen first.
Common questions
How many questions are on the Texas journeyman plumber exam?
The written portion has 100 multiple-choice items with a 120-minute limit at a Pearson VUE test center. Candidates who are not current tradesman plumber-limited licensees also take a hands-on practical: 6 items in 240 minutes at the TSBPE center in Austin or Waco.
What score do you need to pass the Texas journeyman plumber exam?
70%. If your exam includes the practical, you do not have an overall pass until both the written and the practical portions are passed, and the practical must be passed within one year of passing the written.
Which plumbing code is the Texas exam based on?
TSBPE tells candidates to study the Plumbing License Law, the Board Rules and either the 2018 International Plumbing Code with the 2018 International Fuel Gas Code or the 2018 Uniform Plumbing Code. It says the exam is not specific to either code, so you study one. In August 2026 the Board proposed moving its adopted codes to the 2021 editions.
Is the Texas journeyman plumber exam open book?
No. The candidate handbook says books, papers and other reference materials are not permitted in the examination room. The ICC G25 journeyman plumber exam is open book.
How much does the Texas journeyman plumber exam cost?
A $40 application fee to TSBPE, $68.50 for the written exam and $40 for the practical, then a $40 initial license fee after you pass both portions.
How many times can you retake it?
Pearson VUE allows up to five attempts at the written exam on one authorization, all within one year of your TSBPE authorization. You wait 30 days after a first failure, 60 days after a second and 90 days after each later failure.
What is the ICC G25 journeyman plumber exam?
ICC’s National Standard Journeyman Plumber exam: 70 multiple-choice questions, open book on the 2018 International Plumbing Code, 4 hours, $120 at Pearson VUE. ICC says licensing agencies may use its results to meet their testing requirement; check which exam your jurisdiction accepts. ICC says most trades exams need 70% to pass.
Does this practice test include the Texas practical?
No. The practical is hands-on: cutting and joining PVC, copper, threaded steel and no-hub cast iron, finding violations on real water heater installations, and building a scale two-story drainage and vent system. Questions cannot simulate that. Our questions cover the written portion and the code knowledge behind the practical.
Do these questions come from the TSBPE or ICC exams?
No. Every question is original practice written to TSBPE’s published review course and ICC’s G25 content outline, with our own explanation. TSBPE and Pearson VUE do not release exam questions.
Ready for test day?
70 four-option questions in 4 hours, drawn across every section, scored against the 70% pass mark with a score for each section and an explanation for every answer.
Or start with the free ICC G25 drillSources
- Pearson VUE: Texas State Board of Plumbing Examiners (retake waits, practical, five attempts)
- TSBPE Candidate Handbook, August 2025 (exam table, fees, 70% passing score, test-center rules)
- TSBPE Journeyman Plumber Examination Review Course, rev 09/2025 (format, codes, chapters, sample questions)
- TSBPE Administrative Rules, March 2026 (22 TAC §§363.5, 363.22, 365.1, 367.2)
- TSBPE proposed amendment to §367.2 (2021 IPC and UPC), Texas Register, August 14, 2026
- TSBPE Strategic Plan 2025-2029 (examination statistics, p. 14)
- ICC National Contractor/Trades Examination Information Bulletin, published June 30, 2026 (G25 Journeyman Plumber)
- ICC Support: What is a passing score?
Original practice questions written to the TSBPE Journeyman Plumber Examination Review Course, ICC’s G25 content outline and the 2018 International Plumbing Code and Uniform Plumbing Code; they are not exam questions and quote no code text. Independent practice, not affiliated with or endorsed by the Texas State Board of Plumbing Examiners, the International Code Council, IAPMO or Pearson VUE. International Plumbing Code is a trademark of the International Code Council; Uniform Plumbing Code is a trademark of IAPMO. Follow the code adopted where you work.