Oklahoma Residential Plumbing and Natural Gas Contractor Ultimate Exam Prep Rental Package

Prepare for the Oklahoma Residential Plumbing and Natural Gas Contractor licensing examinations with an Ultimate Exam Prep Rental Package built around the technical and business references used for Oklahoma contractor preparation. This package combines highlighted and tabbed rental books, 1 year of course access, Application Service, residential plumbing review, natural gas preparation, plumbing mathematics, OSHA construction safety, contractor Business and Law study, and open-book reference navigation.

The Oklahoma Residential Plumbing Contractor classification is regulated by the Oklahoma Construction Industries Board. The residential classification limits plumbing contracting, supervision, and plumbing work to detached one- or two-family dwellings and multiple single-family dwellings such as townhouses that are not more than three stories in height and have separate means of egress.

The Ultimate package provides the International Residential Code for One- and Two-Family Dwellings, 2018; Code of Federal Regulations - 29 CFR Part 1926 (OSHA); and Mathematics for Plumbers and Pipefitters, 8th Edition. The included Business and Law books are the Oklahoma Plumbing License Law of 1955, Oklahoma Plumbing Industry Regulations, Oklahoma Construction Industries Board Fine Schedule, Oklahoma Lien Law, and NASCLA Contractors Guide to Business, Law and Project Management, 14th Edition.

All included books are highlighted and tabbed to help candidates organize their study time and develop faster reference-navigation habits. Instead of approaching the books for the first time on examination day, students can work with the prepared references throughout their course access and become familiar with important sections, tables, formulas, definitions, and contractor-law topics.

Package Price: $1,695 plus a refundable $400 book deposit, for a total initial payment of $2,095.

Please allow up to 15 business days for Ultimate book package orders.

Exam Details

The Oklahoma Residential Contractor Plumbing and Natural Gas examination is administered through PSI. Eligibility for examination is determined through the Oklahoma Construction Industries Board licensing process.

• Exam: Oklahoma Residential Contractor Plumbing and Natural Gas
• Number of Questions: 85 scored questions
• Time Allowed: 180 minutes
• Passing Score: 75%
• Testing Provider: PSI

The examination is divided into ten technical subject areas:

• General Plumbing Knowledge and Regulations: 10 questions
• Piping, Valves, and Control Valves: 8 questions
• Fixtures and Equipment: 8 questions
• Water Supply: 10 questions
• Drains and Sewers: 10 questions
• Vents: 13 questions
• Traps, Interceptors, Indirect, and Special Waste: 5 questions
• Isometric Analysis: 7 questions
• Fuel Gas: 10 questions
• Safety: 4 questions

Vents is the largest individual examination category with 13 questions. Candidates should study vent installation and wet venting while understanding how vents interact with fixtures, drainage piping, and the overall residential plumbing system.

General Plumbing Knowledge and Regulations includes calculations of area and volume, general code requirements, plumbing definitions, notches and holes in structural members, system testing, water-column concepts, and pipe offsets.

Piping, Valves, and Control Valves covers piping connections, cast iron, copper piping and tubing, steel piping, PVC, CPVC, plastic and PEX piping, and valves. Fixtures and Equipment includes fixture installation, water-heater installation, and fixture requirements.

Water Supply addresses water-supply and distribution lines, protection of the potable water supply, and backflow. Drains and Sewers covers drain and sewer piping, building sewers, cleanouts, drainage fixture units, and drain and waste piping.

Fuel Gas is a 10-question category covering gas piping conduit, general gas piping and valves, supports and hangers, pipe sizing, testing, installation and joining of gas pipe, and threaded connections. Isometric Analysis contains seven questions involving plumbing isometric drawings.

Contractor candidates also prepare for the Oklahoma Plumbing Business and Law examination.

• Business and Law Questions: 50 scored questions
• Time Allowed: 120 minutes
• Passing Score: 75%

Business and Law covers bidding and estimating, project management and supervision, contracts, financial management, labor and personnel, risk management, payroll and payroll taxes, and licensing requirements.

Open Book Test

The Oklahoma Residential Contractor Plumbing and Natural Gas examination is open book. Candidates may use approved references in the examination center while following the applicable PSI rules for reference materials.

The residential technical examination reference list includes the International Residential Code for One- and Two-Family Dwellings, 2018 edition with Oklahoma revisions; Code of Federal Regulations - 29 CFR Part 1926 (OSHA) with applicable amendments; and Mathematics for Plumbers and Pipefitters, 8th Edition.

Reference materials may be highlighted, underlined, and indexed before the examination session. Permanent tabs are allowed. Temporary removable tabs such as Post-it notes are not permitted. Writing in references before or during the examination session is not permitted.

Every technical book included with this Ultimate package is highlighted and tabbed. The goal is to give candidates an organized reference system they can use throughout preparation. Students should regularly practice finding plumbing rules, gas requirements, mathematical information, and OSHA safety topics instead of depending on broad searching during the examination.

Open-book testing requires both trade knowledge and navigation skills. A candidate should first determine what the question is testing, identify the appropriate reference, locate the relevant section or formula, and then apply the information to the question.

Licensing Steps

The Oklahoma Construction Industries Board regulates the Residential Plumbing Contractor classification. Candidates should complete the applicable qualification, application, examination, and licensing requirements for the residential contractor category.

1. Build qualifying plumbing experience. Gain verifiable plumbing experience within the licensing structure applicable to Oklahoma plumbing work.
2. Maintain required apprentice registration. Qualifying Oklahoma apprentice experience must be properly registered when required for that experience to count toward licensing.
3. Meet residential journeyman qualifications. Residential contractor candidates must first satisfy the experience level applicable to residential journeyman qualification.
4. Complete additional contractor experience. Residential Plumbing Contractor applicants must meet the residential journeyman requirements plus one additional year of qualifying experience.
5. Submit the required contractor application. Provide the Oklahoma Construction Industries Board with the applicable application and supporting documentation.
6. Receive authorization for testing. Examination eligibility is determined through the state licensing process.
7. Schedule testing through PSI. Approved candidates arrange their examination appointment with the testing provider.
8. Prepare for the technical examination. Study residential plumbing, water supply, drainage, venting, fixtures, piping, natural gas, mathematics, isometric analysis, and safety.
9. Prepare for Business and Law. Review contractor estimating, project management, contracts, finances, labor, risk management, payroll, licensing, and Oklahoma plumbing regulations.
10. Complete the required examinations. Meet the applicable examination requirements associated with the contractor licensing process.

Application Service is included with this Ultimate package to help candidates organize the Oklahoma Residential Plumbing Contractor application process and required documentation.

State Requirements

An Oklahoma Residential Plumbing Contractor is limited to contracting, supervising, and performing plumbing work for detached one- or two-family dwellings and multiple single-family dwellings, including qualifying townhouses, not more than three stories in height with a separate means of egress.

Residential plumbing contractors must meet the applicable residential journeyman qualification requirements plus one additional year of experience. The state licensing structure distinguishes the residential classification from the unlimited plumbing classification, so candidates should understand the scope associated with the license they are pursuing.

A Residential Plumbing Contractor may operate as an individual or through an eligible business structure and engage in the business of plumbing within the residential category. Work outside the limits of the residential license cannot be performed under the authority of the residential contractor classification.

Experience used toward Oklahoma plumbing licensing should be properly documented. Maintaining accurate apprenticeship, employment, education, and work-experience records can make the application process more organized and can help candidates document their qualifications for licensing review.

Oklahoma also requires licensed plumbing journeymen and contractors to maintain continuing education. Current state plumbing information requires six hours of continuing education within the 36 months preceding license expiration.

Reference Books

• International Residential Code for One- and Two-Family Dwellings, 2018
  Included Book: Highlighted and tabbed rental reference supporting residential plumbing, water supply, drainage, vents, fixtures, piping, structural considerations, and fuel-gas preparation. The examination uses the 2018 edition with applicable Oklahoma revisions.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Included Book: Highlighted and tabbed rental safety reference supporting study of construction activities, ladders, fall-protection requirements, and other OSHA construction-safety topics.
• Mathematics for Plumbers and Pipefitters, 8th Edition
  Included Book: Highlighted and tabbed rental mathematics reference supporting measurements, area, volume, pipe offsets, piping applications, and trade calculations used in plumbing preparation.
• Oklahoma Plumbing License Law of 1955, Oklahoma Statutes, Title 59, Chapter 27
  Included Book: Highlighted and tabbed business reference supporting Oklahoma plumbing licensing law, regulated plumbing work, contractor responsibilities, and licensing requirements.
• Oklahoma Plumbing Industry Regulations, Oklahoma Administrative Code, Title 158, Chapter 30
  Included Book: Highlighted and tabbed business reference covering Oklahoma plumbing classifications, licensing procedures, residential licensing scope, apprentices, journeymen, contractors, and industry requirements.
• Oklahoma Fine Schedule of the Construction Industries Board, Oklahoma Administrative Code, Title 158, Chapter 10
  Included Book: Highlighted and tabbed reference supporting contractor study of Oklahoma Construction Industries Board compliance and enforcement topics.
• Oklahoma Lien Law, Oklahoma Statutes, Title 42, Chapter 3
  Included Book: Highlighted and tabbed statutory reference supporting Business and Law preparation involving construction liens and related contractor responsibilities.
• NASCLA Contractors Guide to Business, Law and Project Management, 14th Edition
  Included Book: Highlighted and tabbed contractor reference supporting bidding, estimating, project management, contracts, financial management, labor, risk management, insurance, and other business topics.

All included technical and business books are highlighted and tabbed. Students should use the books throughout the course so the organization and location of important subjects become familiar before examination day.

Please allow up to 15 business days for Ultimate book package orders.

Test Information and Study Materials

A strong Oklahoma Residential Plumbing and Natural Gas Contractor study plan should combine residential plumbing knowledge with calculations, gas piping, safety, Business and Law, and timed reference navigation.

Spend extra time on venting. With 13 questions, Vents is the largest individual technical category. Review vent installation and wet venting while learning where the applicable provisions are located in the residential code.

Study water supply and drainage together. Water Supply and Drains and Sewers each account for 10 questions. Review distribution lines, backflow, potable-water protection, drainage piping, building sewers, cleanouts, drainage fixture units, and waste piping.

Practice natural gas regularly. Fuel Gas contains 10 questions. Candidates should study gas piping, valves, supports, hangers, sizing, testing, installation, joining methods, and threaded connections.

Work through plumbing calculations. Mathematics for Plumbers and Pipefitters can be used to reinforce area, volume, dimensions, offsets, and other trade calculations. Repetition is especially useful for developing a consistent problem-solving process.

Practice isometric analysis. The technical exam includes seven questions involving isometric drawings. Candidates should become comfortable reading piping layouts and identifying how fixtures, drainage, and vent systems relate within the drawing.

Prepare separately for Business and Law. The contractor examination process includes a 50-question Business and Law exam. Study bidding, estimating, project supervision, contracts, finances, labor, risk management, payroll, liens, and licensing requirements.

Use timed reference-navigation drills. Practice identifying a question category and locating the relevant information in the appropriate reference. Familiarity with highlighted and tabbed books can support a more organized testing approach.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Oklahoma Residential Plumbing and Natural Gas Contractor candidates through organized study guidance, plumbing trade-focused review, practice-oriented preparation, reference navigation, contractor Business and Law study, and confidence-building study structure.

The Ultimate package provides highlighted and tabbed rental books so candidates can work with organized technical and business references throughout preparation. Regular use helps students become familiar with residential plumbing sections, natural gas topics, formulas, safety requirements, licensing law, and contractor business material.

With 1 year of course access, candidates have time to revisit challenging subjects instead of trying to cover the entire examination outline in a short period. Students can spend additional time on venting, drainage, water supply, natural gas, mathematics, isometrics, OSHA safety, and Business and Law as needed.

Practice-oriented preparation encourages candidates to apply information rather than simply read it. Working through questions, calculations, and reference lookups helps develop a repeatable approach to open-book testing.

Application Service is also included with this Ultimate package, providing support for organizing the licensing application process while the candidate focuses on examination preparation.

By combining highlighted and tabbed rental references, 1 year of course access, Application Service, technical study guidance, and contractor-focused preparation, 1 Exam Prep provides a structured path for professionals pursuing the Oklahoma Residential Plumbing and Natural Gas Contractor license.

Frequently Asked Questions

What is included in the Oklahoma Residential Plumbing and Natural Gas Contractor Ultimate package?

The package includes the listed residential plumbing, OSHA, plumbing mathematics, Oklahoma Business and Law, and NASCLA references. All included books are highlighted and tabbed. The package also includes 1 year of course access and Application Service.

How much does the Ultimate package cost?

The package price is $1,695 plus a refundable $400 book deposit, for a total initial payment of $2,095.

Is the $400 book deposit refundable?

Yes. The $400 amount is identified as a refundable book deposit for the rental package.

Are the books highlighted and tabbed?

Yes. All included rental books are highlighted and tabbed to support organized study and open-book reference navigation.

How long should I allow for an Ultimate book package order?

Please allow up to 15 business days for Ultimate book package orders.

Is the Oklahoma Residential Contractor Plumbing and Natural Gas exam open book?

Yes. The technical examination is open book, and candidates may use approved references subject to the applicable testing rules.

How many questions are on the technical exam?

The Residential Contractor Plumbing and Natural Gas examination contains 85 scored questions, allows 180 minutes, and requires a 75% passing score.

Does the exam include natural gas questions?

Yes. Fuel Gas contains 10 questions covering gas piping, valves, supports, hangers, sizing, testing, installation, joining methods, and threaded connections.

Does a contractor candidate also take Business and Law?

The Oklahoma Plumbing Business and Law examination contains 50 scored questions, allows 120 minutes, and requires a 75% passing score.

Does this package include Business and Law books?

Yes. The listed Oklahoma Plumbing License Law, Plumbing Industry Regulations, Construction Industries Board Fine Schedule, Oklahoma Lien Law, and NASCLA Contractors Guide to Business, Law and Project Management, 14th Edition are included with this package.

Does this package include 1 year of course access?

Yes. The Ultimate package includes 1 year of course access so candidates have time to work through technical plumbing, natural gas, mathematics, safety, Business and Law, and reference-navigation preparation.

Is Application Service included?

Yes. Application Service is included with this Ultimate package.