ICC G25 Journeyman Plumber Exam (2018 IPC) Practice Exam
Free Practice Exam
Test your knowledge with 10 questions from our pool of 20 free questions.
- 10 questions per attempt
- 30 minute time limit
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Full Practice Exam
Complete exam simulation matching the real Pearson VUE test format.
- 70 questions (same as real exam)
- 240 minute time limit
- 7 topic areas covered
- 280 questions in pool
- Detailed explanations
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ICC G25 Journeyman Plumber (2018 IPC) Practice Exam Guide
What's on the exam
Questions per topic, out of 70This practice exam follows the official content outline for the ICC G25 Journeyman Plumber (2018 IPC) exam: Administration General Regulations, Plumbing Fixtures, Water Supply and Distribution, Sanitary Drainage, Plumbing Vent Requirements, Traps, Interceptors, and Separators, Storm Drainage.
- Free practice exam: 10 questions per attempt, retake as often as you like.
- Full practice exam: 70 questions on a 4 hours clock, a new draw from our bank every attempt.
Administration General Regulations 28 items
Our study plan for this topic: General Installation Requirements; Code Definitions and Terms; Plan Reading; Testing; Materials; Permits: application, issuance, expiration, and exemptions; Inspection types and sequencing (underground, rough-in, final); Code official authority, duties, and enforcement powers.
Plumbing Fixtures 12 items
Our study plan for this topic: Water Heaters; Water Closets and Urinals; Specialty Fixtures; Minimum number of plumbing fixtures by occupancy type; Fixture installation requirements and spacing clearances; Faucets, shower valves, and temperature-limiting devices; Fixture material standards and quality requirements; Flushing devices for water closets and urinals.
Water Supply and Distribution 10 items
Our study plan for this topic: Service Distribution and Piping; Water Supply and Pressure; Protection of Potable Water Supply; Pipe Materials, Fittings, and Jointing Methods; Hot Water Supply System Requirements; Valve Installation and Location Requirements; Water Hammer and Pressure Regulation; Water System Disinfection Procedures.
Sanitary Drainage 9 items
Our study plan for this topic: Building Sanitary Drainage; Sumps and Ejectors; Indirect and Special Waste Systems; Drainage pipe materials and applicable standards (above-ground, underground, and building sewer); Drainage pipe joints and connection methods by material type; Slope, sizing, and fixture unit load calculations for drainage systems; Cleanout requirements, placement, sizing, and access; Drainage fittings for changes in direction and prohibited connections.
Plumbing Vent Requirements 5 items
Our study plan for this topic: Vent Connections and Grades; Vent Terminals; Vent Pipe Sizing and Developed Length; Individual, Common, and Wet Venting Methods; Air Admittance Valves; Fixture Trap Distance from Vent; Relief Vents and Stack Offset Venting; Outdoor Vent Extensions and Vent Stack Requirements.
Traps, Interceptors, and Separators 5 items
Our study plan for this topic: Installation of Traps; Interceptors and Separators; Trap seal requirements and dimensions; Prohibited trap types; Trap seal protection methods and primer devices; Trap sizing and design requirements; Grease interceptor capacity and flow-through ratings; Oil separator design and capacity requirements.
Storm Drainage 1 item
Our study plan for this topic: Storm Drainage; Sizing of vertical conductors, leaders, and horizontal storm drains using 100-year rainfall rates; Primary and secondary (emergency overflow) roof drain requirements and scupper sizing; Permitted materials for storm drain conductors, building storm sewer pipe, and subsoil drain pipe; Roof drain installation requirements and flow rate calculations; Prohibited connections and disposal requirements for storm water; Storm drainage traps: when required, sizing, and cleanout provisions; Siphonic roof drainage system requirements.
Sample 1 — Administration General Regulations
Question: A battery of trapped fixtures discharges into a horizontal drainage branch that you intend to vent with a single circuit vent. What is the maximum number of traps or trapped fixtures that the circuit vent is defined as serving?
- A. 8
- B. 4
- C. 6
- D. 2
Correct Answer: A
The IPC defines a 'Circuit Vent' (Section 202) as a vent that connects to a horizontal drainage branch and vents two traps to not more than eight traps or trapped fixtures connected into a battery.
Reference: IPC 2018 Chapter 2 — Section 202, definition of Circuit Vent
Sample 2 — Plumbing Fixtures
Question: In a water closet flush tank, the backflow preventer of the antisiphon fill valve shall be located not less than what distance above the full opening of the overflow pipe?
- A. 1 inch
- B. 1/2 inch
- C. 2 inches
- D. 1 1/2 inches
Correct Answer: A
Per IPC 2018 Section 415.3.1, flush tanks shall be equipped with an antisiphon fill valve, and the fill valve backflow preventer shall be located not less than 1 inch above the full opening of the overflow pipe.
Reference: IPC 2018 Chapter 4 — Section 415.3.1 Fill Valves
Sample 3 — Water Supply and Distribution
Question: What is the maximum distance a fixture supply pipe is permitted to terminate from the point of connection to the fixture?
- A. 18 inches
- B. 36 inches
- C. 30 inches
- D. 24 inches
Correct Answer: C
Per IPC 604.5, the fixture supply pipe shall terminate not more than 30 inches from the point of connection to the fixture.
Reference: IPC 2018 Section 604.5
- Your results break the score down by outline topic.
- The real exam's passing score: 70% correct.
- Keep practicing until you pass consistently, not just once.
- Answer what you know first and bookmark the rest. Our practice exams let you bookmark and come back.
- Work your bookmarks on the second pass.
- Real exam pace: about 3 minutes 26 seconds per question.
- After each attempt, look up every miss in your book.
| Questions | 70 questions |
| Time limit | 4 hours |
| Passing score | 70% correct |
| Books in the exam room | Open book |
| Exam fee | $120 |
- Results for examinations taken electronically are available immediately after the examination is completed.
- You must wait 10 days before retaking a failed exam.
Source: National Contractor/Trades Examination Information Bulletin, PUBLISHED June 30, 2026; ICC Exam Catalog, checked October 6, 2026. Check the bulletin before test day: fees and rules can change.