Page |1
COLORADO JOURNEYMAN PLUMBER
EXAMINATION STUDY GUIDE | LATEST
UPDATE 2026/2027 | PRACTICE QUESTIONS
AND ANSWERS | EXAM REVIEW.
TABLE OF CONTENTS
1. Colorado Journeyworker Plumber Certification Overview and Exam Logistics
2. Experience Requirements and Application Process
3. Sanitary Drainage Systems
4. Vents and Venting Systems
5. Water Supply and Distribution
6. Storm Drainage Systems
7. Fixtures, Fixture Fittings, and Equipment
8. Water Heaters and Indirect Wastes
9. Colorado Plumbing Board Rules and Jurisprudence
10. Isometric and Blueprint Reading
11. Exam Preparation Strategies and Code Navigation
, Page |2
Question 1: What is the passing score required for the Colorado Journeyworker Plumber
examination?
A) 60%
B) 70%
C) 75%
D) 80%
Correct Answer: B) 70%
The Colorado State Plumbing Board requires an overall score of 70% to pass the written
portion of the examination for Residential and Journeyworker examinees. Master plumber
examinees require 75%. The exam consists of 100 scored questions, so a candidate must
answer at least 70 questions correctly to pass.
Question 2: How many scored questions are on the Colorado Journeyworker Plumber
examination?
A) 80
B) 100
C) 120
D) 150
Correct Answer: B) 100
The current PSI format for the Journeyworker Plumber examination contains 100 scored
questions, allows 240 minutes (4 hours), and requires 70 correct scored answers. PSI may
add up to 10 unscored questions with up to 30 additional minutes of testing time.
Question 3: What is the time limit for the Colorado Journeyworker Plumber examination?
A) 180 minutes
B) 200 minutes
C) 240 minutes
D) 270 minutes
Correct Answer: C) 240 minutes
, Page |3
The Journeyworker Plumber examination allows 240 minutes (4 hours) for completion. PSI
may add up to 30 additional minutes if unscored pretest questions are included. The Master
Plumber examination allows 270 minutes (4.5 hours).
Question 4: Which code edition is currently referenced for the Colorado Journeyworker
Plumber examination?
A) 2015 IPC
B) 2018 IPC
C) 2021 IPC
D) 2024 IPC
Correct Answer: C) 2021 IPC
The Colorado State Plumbing Board currently references the 2021 edition of the
International Plumbing Code (IPC) and the 2021 edition of the International Residential
Code (IRC) for the Residential, Journeyworker, and Master Plumber licensing examinations.
Effective November 1, 2026, the reference list transitions to the 2024 editions. PSI supplies
the exam-room code references.
Question 5: What is the minimum practical experience required to qualify for the Colorado
Journeyworker Plumber examination?
A) 2 years (3,400 hours)
B) 3 years (5,100 hours)
C) 4 years (6,800 hours)
D) 5 years (8,500 hours)
Correct Answer: C) 4 years (6,800 hours)
The maximum experience the board requires for an applicant to qualify to receive a
Journeyworker Plumber's license is four years (6,800 hours) of practical experience.
Residential Plumber requires 3,400 hours, and Master Plumber requires 8,500 hours.
, Page |4
Question 6: Which of the following is NOT a topic covered on the Colorado Journeyworker
Plumber examination?
A) Sanitary drainage systems
B) Vents and venting
C) Roofing membrane installation
D) Water supply and distribution
Correct Answer: C) Roofing membrane installation
The Colorado plumber examination covers cross-connections, calculations and blueprint
reading, combination waste and vent systems, hangers/supports and system protection,
indirect and special waste piping, installation techniques, plumbing fixtures, sanitary
drainage systems, storm drainage systems, traps/interceptors/separators, vents/venting, and
water distribution systems. Roofing membrane installation is not a plumbing examination
topic.
Question 7: Under the IPC, what is the minimum slope required for horizontal drainage
piping 2½ inches or smaller?
A) 1/8 inch per foot
B) 1/4 inch per foot
C) 1/2 inch per foot
D) 1 inch per foot
Correct Answer: B) 1/4 inch per foot
The IPC requires horizontal drainage piping 2½ inches or smaller to be installed at a
minimum slope of 1/4 inch per foot (2% slope). Piping 3 inches or larger may be installed at
1/8 inch per foot where approved by the code official. Proper slope ensures adequate flow
velocity for solids transport.
Question 8: What is the drainage fixture unit (DFU) value for a residential water closet with a
flush volume of 1.6 gallons per flush or less?
COLORADO JOURNEYMAN PLUMBER
EXAMINATION STUDY GUIDE | LATEST
UPDATE 2026/2027 | PRACTICE QUESTIONS
AND ANSWERS | EXAM REVIEW.
TABLE OF CONTENTS
1. Colorado Journeyworker Plumber Certification Overview and Exam Logistics
2. Experience Requirements and Application Process
3. Sanitary Drainage Systems
4. Vents and Venting Systems
5. Water Supply and Distribution
6. Storm Drainage Systems
7. Fixtures, Fixture Fittings, and Equipment
8. Water Heaters and Indirect Wastes
9. Colorado Plumbing Board Rules and Jurisprudence
10. Isometric and Blueprint Reading
11. Exam Preparation Strategies and Code Navigation
, Page |2
Question 1: What is the passing score required for the Colorado Journeyworker Plumber
examination?
A) 60%
B) 70%
C) 75%
D) 80%
Correct Answer: B) 70%
The Colorado State Plumbing Board requires an overall score of 70% to pass the written
portion of the examination for Residential and Journeyworker examinees. Master plumber
examinees require 75%. The exam consists of 100 scored questions, so a candidate must
answer at least 70 questions correctly to pass.
Question 2: How many scored questions are on the Colorado Journeyworker Plumber
examination?
A) 80
B) 100
C) 120
D) 150
Correct Answer: B) 100
The current PSI format for the Journeyworker Plumber examination contains 100 scored
questions, allows 240 minutes (4 hours), and requires 70 correct scored answers. PSI may
add up to 10 unscored questions with up to 30 additional minutes of testing time.
Question 3: What is the time limit for the Colorado Journeyworker Plumber examination?
A) 180 minutes
B) 200 minutes
C) 240 minutes
D) 270 minutes
Correct Answer: C) 240 minutes
, Page |3
The Journeyworker Plumber examination allows 240 minutes (4 hours) for completion. PSI
may add up to 30 additional minutes if unscored pretest questions are included. The Master
Plumber examination allows 270 minutes (4.5 hours).
Question 4: Which code edition is currently referenced for the Colorado Journeyworker
Plumber examination?
A) 2015 IPC
B) 2018 IPC
C) 2021 IPC
D) 2024 IPC
Correct Answer: C) 2021 IPC
The Colorado State Plumbing Board currently references the 2021 edition of the
International Plumbing Code (IPC) and the 2021 edition of the International Residential
Code (IRC) for the Residential, Journeyworker, and Master Plumber licensing examinations.
Effective November 1, 2026, the reference list transitions to the 2024 editions. PSI supplies
the exam-room code references.
Question 5: What is the minimum practical experience required to qualify for the Colorado
Journeyworker Plumber examination?
A) 2 years (3,400 hours)
B) 3 years (5,100 hours)
C) 4 years (6,800 hours)
D) 5 years (8,500 hours)
Correct Answer: C) 4 years (6,800 hours)
The maximum experience the board requires for an applicant to qualify to receive a
Journeyworker Plumber's license is four years (6,800 hours) of practical experience.
Residential Plumber requires 3,400 hours, and Master Plumber requires 8,500 hours.
, Page |4
Question 6: Which of the following is NOT a topic covered on the Colorado Journeyworker
Plumber examination?
A) Sanitary drainage systems
B) Vents and venting
C) Roofing membrane installation
D) Water supply and distribution
Correct Answer: C) Roofing membrane installation
The Colorado plumber examination covers cross-connections, calculations and blueprint
reading, combination waste and vent systems, hangers/supports and system protection,
indirect and special waste piping, installation techniques, plumbing fixtures, sanitary
drainage systems, storm drainage systems, traps/interceptors/separators, vents/venting, and
water distribution systems. Roofing membrane installation is not a plumbing examination
topic.
Question 7: Under the IPC, what is the minimum slope required for horizontal drainage
piping 2½ inches or smaller?
A) 1/8 inch per foot
B) 1/4 inch per foot
C) 1/2 inch per foot
D) 1 inch per foot
Correct Answer: B) 1/4 inch per foot
The IPC requires horizontal drainage piping 2½ inches or smaller to be installed at a
minimum slope of 1/4 inch per foot (2% slope). Piping 3 inches or larger may be installed at
1/8 inch per foot where approved by the code official. Proper slope ensures adequate flow
velocity for solids transport.
Question 8: What is the drainage fixture unit (DFU) value for a residential water closet with a
flush volume of 1.6 gallons per flush or less?
