100+ Free NITC Journey Level Plumber Practice Questions

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Which organization publishes the Uniform Plumbing Code (UPC) used as the reference for the NITC Journey Level Plumber examination?

International Code Council (ICC)

International Association of Plumbing and Mechanical Officials (IAPMO)

American Society of Plumbing Engineers (ASPE)

National Fire Protection Association (NFPA)

to track

2026 Statistics

Key Facts: NITC Journey Level Plumber Exam

100

Questions

NITC Bulletin

75%

Passing Score

75 of 100 correct

2.5 hrs

Time Limit

Open book

$140

Exam Fee

$205 at Prometric

5 yrs

Valid

Recert via 25-Q exam

4 yrs

Experience

UA program required

The NITC Journey Level Plumber exam has 100 multiple-choice questions, a 2.5-hour open-book time limit, and requires 75% (75 correct) to pass. Candidates may use the 2018 or 2021 Uniform Plumbing Code (UPC) during testing. Four content domains are weighted equally at 25% each: General UPC Knowledge, Sizing DWV Systems, Sizing Water Supply, and Sizing Fuel Piping. Certification is valid 5 years; recertification is a 25-question open-book exam (68% passing).

Sample NITC Journey Level Plumber Practice Questions

Try these sample questions to test your NITC Journey Level Plumber exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which organization publishes the Uniform Plumbing Code (UPC) used as the reference for the NITC Journey Level Plumber examination?

A.International Code Council (ICC)

B.International Association of Plumbing and Mechanical Officials (IAPMO)

C.American Society of Plumbing Engineers (ASPE)

D.National Fire Protection Association (NFPA)

Explanation: IAPMO publishes the Uniform Plumbing Code (UPC) using ANSI-accredited consensus procedures. The NITC Journey Level Plumber exam permits the 2018 or 2021 UPC as the only open-book reference. The ICC publishes the competing International Plumbing Code (IPC), which is not used by NITC.

2Which UPC chapter contains the General Regulations governing administration and overall design requirements for plumbing systems?

A.Chapter 2

B.Chapter 3

C.Chapter 5

D.Chapter 7

Explanation: UPC Chapter 3 contains General Regulations covering items such as protection of piping, structural safety, trenching/excavation rules, and condensate disposal. Chapter 2 is Definitions, Chapter 5 covers Water Heaters, and Chapter 7 covers Sanitary Drainage.

3Per UPC Chapter 2 definitions, a 'fixture branch' is best described as which of the following?

A.The drainage pipe between the trap of a fixture and the vent

B.A drain pipe connecting one or more fixtures to the main or branch drainage pipe

C.The horizontal pipe that conveys discharge from a stack

D.A vertical pipe extending one or more stories used to vent fixtures

Explanation: UPC defines a fixture branch as a drain pipe serving one or more fixtures and discharging into another drain. Option A describes a trap arm. Option C describes a horizontal branch from a stack. Option D describes a vent stack.

4Under the UPC, when is a plumbing permit generally required?

A.Only for new construction

B.For installation, alteration, repair, or replacement of any plumbing system, except minor repairs

C.Only for commercial work over $5,000

D.Only when connecting to the public sewer

Explanation: UPC Chapter 1 (Administration) requires a permit for installation, alteration, repair, or replacement of plumbing systems. Stoppage clearing, faucet washer replacement, and similar minor repairs are typically exempt.

5Per UPC Chapter 3, how must trenches be backfilled to protect plumbing piping?

A.With any available native soil compacted in 24-inch lifts

B.With clean fill, free of rocks or debris, placed in lifts and compacted to prevent damage

C.With concrete slurry only

D.With pea gravel covering the full trench depth

Explanation: UPC Chapter 3 requires backfill to be clean, free of rocks/sharp debris, and placed in layers and compacted so that piping is not damaged or displaced. Initial bedding around pipe is typically sand or fine soil; native fill above must be free of large rocks.

6Which of the following materials is NOT permitted by the UPC for use in a building sewer?

A.ABS DWV

B.Cast iron soil pipe

C.PVC DWV

D.Galvanized steel

Explanation: Galvanized steel is not approved by the UPC for building sewer service due to corrosion susceptibility. ABS DWV, PVC DWV, cast iron, vitrified clay, and ductile iron are listed for sewer service per UPC Chapter 7.

7Per UPC, what is the maximum allowable lead content of solder and flux used in joints for potable water piping?

A.0.2% lead

B.0.25% weighted average lead

C.2% lead

D.5% lead

Explanation: Federal Safe Drinking Water Act and UPC reference a 0.25% weighted-average lead limit for wetted surfaces of pipe, fittings, and fixtures used in potable water service. Solder/flux must be lead-free per the same standard.

8Per UPC, hot water delivered to public lavatories used for handwashing shall not exceed what temperature?

A.100°F

B.110°F

C.120°F

D.140°F

Explanation: UPC limits hot water at public lavatories to 110°F to prevent scalding. ASSE 1070 thermostatic mixing valves are commonly used to comply. Note: this is the lavatory delivery temperature, distinct from the 120°F maximum recommended at residential fixtures.

9Which UPC chapter contains requirements specific to plumbing in health care facilities?

A.Chapter 4

B.Chapter 11

C.Chapter 13

D.Chapter 14

Explanation: UPC Chapter 13 contains Health Care Facility Plumbing requirements, including sterilizers, vacuum systems, and special fixtures. Chapter 4 is Plumbing Fixtures, Chapter 11 is Storm Drainage, and Chapter 14 is Firestop Protection.

10Per UPC, what is the minimum required potable water supply pressure at any fixture under flow conditions?

A.8 psi

B.15 psi

C.20 psi

D.30 psi

Explanation: UPC requires a minimum flow pressure of 15 psi at the fixture (with flushometer fixtures sometimes requiring higher). Maximum static pressure is 80 psi; above that a pressure-reducing valve is required.

About the NITC Journey Level Plumber Exam

The NITC Journey Level Plumber Certification is an ANSI-accredited national credential for journey-level plumbers. The 100-question open-book exam tests applied knowledge of the Uniform Plumbing Code (UPC), with equal weighting on general code knowledge, DWV sizing, water supply sizing, and fuel piping sizing.

Questions

100 scored questions

Time Limit

2.5 hours

Passing Score

75%

Exam Fee

$140 ($205 at Prometric) (NITC (National Inspection Testing & Certification))

NITC Journey Level Plumber Exam Content Outline

25%

General Knowledge of the Uniform Plumbing Code

UPC definitions, administration, permits, inspections, materials, joints, and Chapters 3-4 general regulations and fixtures

25%

Sizing Drainage, Waste, and Vent Systems

DFU calculations, drainage slope, vent sizing, trap arms, building drains/sewers (UPC Chapters 7-10 + Appendix A)

25%

Sizing Water Supply and Distribution

Fixture units, pipe sizing tables, pressure loss, hot water supply, backflow prevention (UPC Chapters 5-6 + Appendix A)

25%

Sizing Fuel Piping

Natural gas and LP sizing tables, BTU loads, drip legs, shutoff valves, manifold pressures (UPC Chapter 12 + Appendices)

How to Pass the NITC Journey Level Plumber Exam

What You Need to Know

Passing score: 75%
Exam length: 100 questions
Time limit: 2.5 hours
Exam fee: $140 ($205 at Prometric)

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

NITC Journey Level Plumber Study Tips from Top Performers

1Tab your UPC code book by chapter — Chapters 6 (water supply), 7 (DWV), 9 (vents), and 12 (fuel gas) are the highest-yield sections

2Memorize the DFU/WSFU sizing tables in UPC Appendix A — most sizing questions trace directly to these tables

3Know minimum slopes: 2-inch and smaller drains 1/4 in/ft, 3-inch and larger 1/8 in/ft

4Practice fuel gas sizing using the longest-length method with both natural gas and LP tables

5Domains are weighted exactly 25% each — do not over-study one area at the expense of another

Frequently Asked Questions

How many questions are on the NITC Journey Level Plumber exam?

The NITC Journey Level Plumber exam has 100 multiple-choice questions. It is an open-book exam with a 2.5-hour time limit. You need 75% (75 correct answers) to pass. The exam is administered by an NITC-approved proctor, often at a PSI testing center.

What code edition is used on the NITC Journey Plumber exam?

The NITC Journey Level Plumber exam is based on the 2018 or 2021 edition of the Uniform Plumbing Code (UPC), published by IAPMO. Candidates may bring and reference the UPC during the open-book exam. Tabbing your code book by chapter is strongly recommended for efficient lookups under time pressure.

What are the qualification requirements for NITC Journey Plumber?

Candidates must document a minimum of four (4) years of experience installing plumbing systems and have completed a UA training program or equivalent. The NITC certification is ANSI-accredited and recognized nationally as evidence of journey-level competence in plumbing system installation, repair, and service.

How long is the NITC Journey Plumber certification valid?

NITC Journey Level certifications are valid for five (5) years from issuance. Recertification is accomplished by passing a 25-question open-book multiple-choice exam within 30 days of expiration, requiring 17 correct answers (68%) to pass. Computer-based recertification is $40; paper-based is $49.

How much does the NITC Journey Plumber exam cost?

The NITC Journey Level Plumber examination fee is $140. If you choose to test at a Prometric center, an additional $65 processing fee applies, bringing the total to $205. Re-examination fees are listed in the NITC Certification Examination Price List.