Indiana licensing requirement: Plumbing Contractor candidates must first have their examination application reviewed and approved by the Indiana Plumbing Commission before registering for the examination through PROV.
Indiana Plumbing Contractor Exam Overview
Indiana licenses Plumbing Contractors through the Indiana Plumbing Commission. The contractor examination is administered through PROV and tests both technical plumbing knowledge and contractor-level Indiana Business knowledge.
The published PROV exam blueprint lists 90 questions with a three-hour testing period. Indiana rules require at least 70% on the written multiple-choice contractor examination.
License: Indiana Plumbing Contractor
Licensing Authority: Indiana Plumbing Commission
Testing Provider: PROV
Questions: 90
Time: 3 hours
Passing Requirement: 70% on the written section
References: Authorized code and business-law references permitted under PROV rules
License Classification Indiana Plumbing Contractor
Licensing Authority Indiana Plumbing Commission
Testing Provider PROV
Questions 90
Time Limit 3 hours
Passing Requirement 70% on the written multiple-choice section
Reference Format Authorized references permitted under PROV testing rules
Eligibility Indiana Plumbing Commission approval required before PROV registration
Primary Plumbing Reference 2006 International Plumbing Code, Indiana Edition, with permitted substitutes
Indiana Reference 2012 Indiana Amendments, 675 IAC 16-1.4
Indiana Plumbing Contractor Exam Subject Breakdown
These study bars are based on the published PROV contractor examination question counts.
Indiana Business 14 Questions
Sanitary Drainage 13 Questions
Vents 13 Questions
Water Supply & Distribution 12 Questions
Fixtures 10 Questions
Developed Length / Isometric Analysis 10 Questions
General Requirements 9 Questions
Water Heaters 5 Questions
Storm Water Systems 4 Questions
Indiana Business Contractor Exam Prep
Indiana Business is the largest single category on the published contractor exam blueprint. Contractor candidates should prepare for business and project-management topics in addition to trade knowledge.
Business Operations
- Business organization
- Financial management
- Estimating and bidding
- Contracts
- Project management
- Recordkeeping
Contractor Responsibilities
- Insurance
- Bonding
- Labor and employment topics
- Risk management
- Safety responsibilities
- Indiana contractor requirements
Sanitary Drainage & Vent Exam Prep
Sanitary Drainage and Vents account for 26 questions combined, making these two systems some of the most important technical areas in Indiana Plumbing Contractor exam prep.
Sanitary Drainage
- Drainage pipe sizing
- Drainage fixture units
- Cleanouts
- Building drains
- Building sewers
- Traps and interceptors
Venting
- Vent sizing
- Vent connections
- Individual vents
- Common vents
- Wet venting
- Vent-system design
Water Supply & Distribution Exam Prep
Water Supply and Distribution accounts for 12 published contractor exam questions and deserves dedicated study time.
Water Distribution
- Pipe sizing
- Water pressure
- Fixture demand
- Water distribution systems
- Valves
- Backflow protection
Calculations
- Developed length
- Pressure-loss concepts
- Fixture-unit calculations
- Pipe-sizing tables
- System-demand calculations
- Code-table navigation
Fixtures & Water Heater Exam Prep
Plumbing Fixtures
- Fixture requirements
- Fixture installation
- Minimum fixture counts
- Connections
- Clearances
- Fixture-unit values
Water Heaters
- Installation requirements
- Temperature and pressure relief
- Drain pans
- Connections
- Safety requirements
- Code navigation
Developed Length & Isometric Analysis
The published contractor exam includes 10 questions specifically assigned to developed length and isometric analysis.
- Read plumbing isometric drawings accurately.
- Trace drainage and vent piping.
- Calculate developed pipe length.
- Identify fittings and direction changes.
- Apply fixture-unit values to diagrams.
- Use code tables with isometric layouts.
- Practice plumbing math under timed conditions.
Storm Water Systems Exam Prep
Storm Water Systems account for four questions on the published Indiana Plumbing Contractor exam blueprint.
- Roof drainage
- Storm-drain sizing
- Leaders and conductors
- Storm-system connections
- Rainfall and sizing concepts
- Code-table navigation
Reference-book reminder: PROV allows authorized references under its exam rules. Permanent tabs and highlighting are permitted within the published guidelines, while moveable tabs, Post-it notes and test-preparation study guides are not permitted in the testing room.
Published Indiana Plumbing Contractor Exam References
Plumbing Code References
- 2006 International Plumbing Code, Indiana Edition
- Permitted 2006 IPC substitutes listed by PROV
- 2012 Indiana Amendments, 675 IAC 16-1.4
Business References
- Basic Contractors Guide to Business, Law and Project Management
- Indiana Plumbing Supplement
- Permitted substitute business references listed in the PROV bulletin
Always verify the current PROV Candidate Information Bulletin before purchasing or preparing reference books because approved titles, editions and testing rules can change.
Open-Reference Plumbing Contractor Exam Strategy
Having books in the testing room does not remove the time limit. With 90 questions in three hours, candidates average about two minutes per question. Fast reference navigation matters.
- Learn the index and table of contents in each approved reference.
- Use permanent tabs according to PROV rules.
- Highlight important code tables before exam day.
- Practice identifying which book contains the answer.
- Do not rely on study guides inside the testing room.
- Practice 90-question timed exam simulations.
- Flag difficult questions and return to them after easier questions.
Indiana Plumbing Contractor Licensing Requirements
Exam preparation and licensing are separate steps. The Indiana Plumbing Commission must approve a candidate's examination eligibility before PROV registration.
Common contractor application paths include:
- Indiana Plumbing Commission approved apprenticeship
- Qualifying plumbing-trade experience
- Qualifying plumbing-business experience
- Required experience documentation
- Commission examination approval
- PROV exam registration after approval
Passing the examination does not by itself issue the license. Candidates must complete the remaining Plumbing Commission requirements.
Indiana Plumbing Contractor Exam Prep Roadmap
Use the official subject blueprint to organize your contractor exam prep and spend the most time on the highest-value categories.
1
Confirm Eligibility
Complete the Indiana Plumbing Commission application process and obtain approval to sit for the contractor examination.
2
Prepare Approved References
Obtain the plumbing-code, Indiana-amendment and business-law references listed in the current PROV bulletin.
3
Study Indiana Business
Give contractor business and law serious attention because it is the largest single published exam category.
4
Master Drainage & Venting
Study sanitary drainage, vent sizing, traps, cleanouts, fixture units and code tables.
5
Practice Water Systems
Review water supply, distribution, pipe sizing, pressure and backflow protection.
6
Practice Isometrics
Work developed-length, plumbing math and isometric-analysis problems until the process becomes familiar.
7
Complete Timed Practice Exams
Practice the full 90-question format under the three-hour testing limit.
Six-Week Indiana Plumbing Contractor Exam Prep Plan
Week 1
References & Business
- Reference setup
- Indiana Business
- Contract law
- Diagnostic exam
Week 2
Drainage
- Sanitary drainage
- Fixture units
- Cleanouts
- Traps
Week 3
Vents & Fixtures
- Vent sizing
- Vent methods
- Fixtures
- Water heaters
Week 4
Water Supply
- Pipe sizing
- Pressure
- Distribution
- Backflow protection
Week 5
Isometrics & Storm
- Developed length
- Isometric analysis
- Plumbing math
- Storm systems
Week 6
Timed Simulation
- 90-question exams
- Three-hour timing
- Reference drills
- Missed-question review
Frequently Asked Questions
Indiana Licensing
Who regulates plumbing contractors in Indiana?
Indiana Plumbing Contractor licensing is handled through the Indiana Plumbing Commission under the Indiana Professional Licensing Agency.
Who administers the Indiana Plumbing Contractor exam?
The contractor examination is administered through PROV. Candidates must first receive examination eligibility approval from the Indiana Plumbing Commission.
Do I need approval before registering with PROV?
Yes. The Indiana Plumbing Commission states that candidates must have their examination application reviewed and approved before registering for the exam through PROV.
Exam Details
How many questions are on the Indiana Plumbing Contractor exam?
The published PROV Indiana Plumbing Contractor examination blueprint lists 90 questions.
How long is the Indiana Plumbing Contractor exam?
Candidates are allowed three hours for the published Indiana Plumbing Contractor examination.
What score is required to pass the written contractor exam?
Indiana administrative rules require a score of at least 70 percent on the multiple-choice written section of the Plumbing Contractor examination.
Is the Indiana Plumbing Contractor exam open book?
PROV examinations are designed to allow candidates to use authorized references. The current candidate bulletin should always be checked for the approved books and reference rules before test day.
Exam Subjects
What is the largest subject on the contractor exam?
Indiana Business is the largest single published category, with 14 questions on the PROV contractor exam blueprint.
How many sanitary drainage questions are on the exam?
The published exam blueprint lists 13 Sanitary Drainage questions. Candidates should study drainage sizing, fixture units, cleanouts, traps, building drains and related code rules.
How many vent questions are on the exam?
The published blueprint lists 13 Vent questions. Study vent sizing, connections, wet venting, common venting and other permitted venting methods.
How many water supply questions are on the exam?
Water Supply and Distribution accounts for 12 questions on the published contractor exam blueprint.
Are plumbing isometrics tested?
Yes. Developed Length and Isometric Analysis account for 10 published contractor exam questions, so isometric practice should be a regular part of your exam prep.
Books & References
What plumbing code should I study?
The published PROV bulletin lists the 2006 International Plumbing Code, Indiana Edition, and permits certain specified substitutes. Always check the current bulletin before buying or preparing books.
What Indiana amendments are listed for the exam?
The published PROV reference list includes the 2012 Indiana Amendments, 675 IAC 16-1.4.
Can I use tabs in my exam books?
PROV permits permanent tabs under its published reference rules. Moveable tabs and Post-it notes are not permitted.
Can I highlight my approved books?
PROV permits highlighting and underlining subject to its reference-material rules. Candidates cannot mark or write in their books during the examination.
Can I bring practice exams or study guides into the testing room?
No. PROV states that test-preparation study guides and practice examinations are not approved reference materials for the testing room.
Licensing & Exam Strategy
What Indiana Business topics should I study?
Focus on contractor business organization, estimating, bidding, contracts, financial management, project management, labor and employment topics, risk management, insurance, bonding and Indiana-specific business requirements.
Does passing the exam automatically make me a licensed Plumbing Contractor?
No. Passing the examination is one part of the licensing process. Candidates must complete any remaining Indiana Plumbing Commission requirements before a license is issued.
Indiana Plumbing Contractor Exam Prep Resources
Prepare for the Indiana Plumbing Contractor Exam
Build Indiana Business knowledge, plumbing-code navigation speed, drainage and vent expertise, water-system knowledge, isometric skill and timed contractor exam confidence for the Indiana Plumbing Contractor licensing examination.
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