Plumbing Fixtures Practice Questions
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.
100 questions in 2 hours, scored against the 70% pass mark, with a score for fixtures so you know where you stand.
Free fixtures drillThe joint between a floor-outlet water closet and its flange is sealed with:
Plumbing Fixtures on the journeyman plumber exam
The fixtures chapter covers approved fixtures and fittings and how they are installed. TSBPE lists water closets, lavatories, tubs, showers, sinks, washers, dishwashers, disposers and fixture fittings; ICC’s Plumbing Fixtures area is 17% of the G25 exam (including water heaters).
- On our mocks
- Texas: 9 of 100 on our Texas mock · ICC G25: 8 of 70 on our ICC G25 mock
- Our drill
- 10 questions from 36 fixtures questions, untimed, an explanation and code reference after every answer; one free attempt, unlimited with a pass
What fixtures questions test
- Clearances: 15 inches from a water closet’s centerline to a side wall, 30 inches between centers, and front clearance by code
- Showers: the 30-inch circle, pressure-balance or thermostatic valves limited to 120°F, and pan liners
- Trap sizes by fixture: lavatory 1-1/4, sink and tub 1-1/2, floor drain and washer standpipe 2 inches; shower traps are 2 inches in the UPC, while the IPC allows 1-1/2 inches for showers flowing 5.7 gpm or less
- Dishwashers, food waste disposers, overflows, slip joints, setting and sealing fixtures
- Flow and flush limits in the IPC table, and seats and drinking fountains in public toilet rooms
Sit the full exam under the real clock
100 questions in 2 hours, scored against the 70% pass mark, with a score for fixtures so you know where you stand.
Free fixtures drillHow to study it
- Make a trap-size table by fixture, noting the shower difference between the codes; it answers many fixture and drainage questions.
- Where the IPC and UPC differ (front clearance, shower floor area, flush and flow limits), learn your exam’s code.
- Picture a bathroom rough-in and walk through each clearance from the wall.
Common questions
How far must a toilet be from the side wall?
At least 15 inches from the centerline of the water closet to any side wall, partition or vanity, and 30 inches center to center between water closets, in both the IPC and the UPC.
Are water heaters in the fixtures area?
ICC lists water heaters under Plumbing Fixtures. TSBPE treats water heaters as their own chapter, so we give them their own section and drill.
100 questions in 2 hours, scored against the 70% pass mark, with a score for fixtures so you know where you stand.
Free fixtures drillThe other sections
- Code Definitions and Plan Reading
- General Regulations, Testing and Plumbing Math
- Pipe Materials and Joints
- Water Heaters
- Water Supply and Distribution
- Sanitary Drainage
- Vents
- Traps, Interceptors and Separators
- Storm Drainage
- Fuel Gas Piping
- Texas Plumbing License Law and Board Rules
- Texas practice exam (100 questions, 2 hours)
- ICC G25 practice exam (70 questions, 4 hours)
- Free Texas mixed drill
Sources
- 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.