Water Heater Practice Questions
T&P relief valves and their discharge piping, pans, garage installations, shutoff valves, thermal expansion, combustion air, vent connectors and gas connections.
100 questions in 2 hours, scored against the 70% pass mark, with a score for water heaters so you know where you stand.
Free water heaters drillThe discharge pipe from a water heater relief valve must be:
Water Heaters on the journeyman plumber exam
TSBPE gives water heaters their own review-course chapter, and in Texas the practical asks candidates to find code violations on numbered water heater installations. Safety devices, location and connections come up on both written exams.
- On our mocks
- Texas: 8 of 100 on our Texas mock · ICC G25: 4 of 70 on our ICC G25 mock
- Our drill
- 10 questions from 29 water heaters questions, untimed, an explanation and code reference after every answer; one free attempt, unlimited with a pass
What water heaters questions test
- T&P relief valves: 210°F and 150 psi limits, sensing element in the top 6 inches, and discharge piping rules
- Pans: 1-1/2 inches deep with a 3/4-inch drain where a leak would cause damage
- Location: 18 inches above a garage floor for ignition sources, protection from vehicles, bedrooms and bathrooms, access
- Valves and expansion: a shutoff on the cold supply and thermal expansion control in closed systems
- Gas-fired heaters: combustion air, draft hoods, vent connector slope, shutoff valve within 6 feet and the sediment trap
Sit the full exam under the real clock
100 questions in 2 hours, scored against the 70% pass mark, with a score for water heaters so you know where you stand.
Free water heaters drillHow to study it
- Draw a water heater with every required part labeled, then list what is wrong with a heater that is missing each one.
- Memorize the relief valve discharge rules; they are the most common violations.
- Practise the combustion air volume: 50 cubic feet per 1,000 Btu/h.
Common questions
What does the Texas practical ask about water heaters?
TSBPE’s review course says candidates view several numbered water heater installations, each with the manufacturer’s labels, and must identify the code violations in each.
Can a relief valve discharge pipe have a valve?
No. The discharge must be full size, drain by gravity, have no valve or tee, and end unthreaded, so nothing can block it.
100 questions in 2 hours, scored against the 70% pass mark, with a score for water heaters so you know where you stand.
Free water heaters drillThe other sections
- Code Definitions and Plan Reading
- General Regulations, Testing and Plumbing Math
- Pipe Materials and Joints
- Plumbing Fixtures
- 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.