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Key Facts: IA Plumber Exam
75%
Passing Score
Kirkwood Community College
75
Questions
3-hour open-book exam
$35 + $119
Application + Exam Fee
Iowa DIAL / Kirkwood
2024 UPC
Code Base
481 IAC Chapter 425
Iowa's journeyperson plumber exam is based on the 2024 UPC as adopted and amended in 481 IAC Chapter 425, and Kirkwood Community College administers it for the Plumbing and Mechanical Systems Board. Iowa uses the UPC rather than the IPC. The open-book exam has 75 questions in 3 hours, requires 75% to pass, and gives the most weight to sanitary drainage and vents (20% each).
Sample IA Plumber Practice Questions
Try these sample questions to review concepts for the IA Plumber exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 375+ question experience with AI tutoring.
1Under the 2024 UPC as adopted in Iowa, how is the minimum building sewer size determined?
2What slope applies to a 4-inch horizontal drainage pipe under the 2024 UPC?
3What DFU value does the 2024 UPC assign to a private 1.6-gpf water closet?
4Per the Iowa State Plumbing Code (UPC), what is the maximum distance between cleanouts on a horizontal drainage pipe?
5Which containment protection does Iowa require for a high-hazard public water service?
6What is the maximum flow rate for an individual showerhead under the 2024 UPC?
7Which protection does the 2024 UPC require against excessive water-heater temperature?
8Per the Iowa State Plumbing Code (UPC), what is the minimum trap seal depth for a standard plumbing fixture?
9What is the general minimum vent size under the 2024 UPC?
10Per the Iowa State Plumbing Code (UPC), what is the maximum static water pressure in a building distribution system?
About the IA Plumber Exam
Iowa's Journeyperson Plumber with Gas exam is given by Kirkwood Community College for the Plumbing and Mechanical Systems Board. It is a 75-question, 3-hour open-book exam based on the 2024 Uniform Plumbing Code (UPC) with Iowa amendments, covering general regulations, fixtures, water heaters, water supply, sanitary drainage, indirect wastes, vents, traps and interceptors, storm drainage, and fuel gas piping.
Exam sponsor: Iowa Plumbing and Mechanical Systems Board. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
75 questions
Time Limit
3 hours
Passing Score
75%
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Chapter 3 – General Regulations
UPC general regulations as amended in Iowa: installation practices, dead legs, trenching and protection of piping
Chapter 4 – Fixtures and Fittings
Fixture installation, fittings, and Iowa's amended fixture-count table
Chapter 5 – Water Heaters
Water heater installation, venting, drain pans, and relief valves
Chapter 6 – Water Supply and Distribution
Water supply piping, sizing, backflow prevention, and water hammer protection
Chapter 7 – Sanitary Drainage
Drainage fixture units, drain sizing, stacks, and sanitary drainage materials
Chapter 8 – Indirect Wastes
Indirect waste receptors, air gaps and air breaks
Chapter 9 – Vents
Vent sizing, wet venting, yoke, relief and common vents, and vent termination
Chapter 10 – Traps and Interceptors
Trap requirements and grease interceptors
Chapter 11 – Storm Drainage
Roof drains, gutters, leaders and secondary roof drainage
Chapter 12 – Fuel Gas Piping
Gas piping sizing, meters, CSST bonding, and Iowa's fuel gas amendments
Preparing for the IA Plumber Exam
What You Need to Know
- Passing score: 75%
- Exam length: 75 questions
- Time limit: 3 hours
- Exam / certification fees: $35 application + $119 exam Official sources
Using Our Practice Resources
- Work through all 375 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
IA Plumber: Suggested Study Strategy
Frequently Asked Questions
What code does Iowa use for the plumber exam?
Iowa uses the 2024 Uniform Plumbing Code (UPC) with Iowa amendments in 481 IAC Chapter 425. The exam covers drainage, venting, water supply, fuel gas piping, and fixture requirements as adopted by the state, and the amendment booklet is an allowed exam reference.
Who administers the Iowa plumber exam?
Kirkwood Community College administers the exam as the approved examination provider of the Iowa Plumbing and Mechanical Systems Board. You first apply to the board, then register and pay the exam fee with Kirkwood.
How many questions are on the Iowa plumber exam?
The Iowa Journeyperson Plumber with Gas exam has 75 questions with a 3-hour time limit. A score of 75% or above is required to pass.
Is the IA plumber exam open book?
Yes. The exam is open book: you may bring the 2024 Uniform Plumbing Code and the Iowa State Plumbing Code 2024 amendment booklet, bound or loose-leaf, but photocopies and handwritten notes in the books are not allowed.