{"product_id":"california-boiler-hot-water-heating-and-steam-fitting-c-4-contractor-licensing-exam-prep-book-reference-package","title":"California Boiler, Hot-Water Heating And Steam Fitting (C-4) Contractor Licensing Exam Prep Book Reference Package","description":"\u003ch1 style=\"color: #d32f2f;\"\u003eCalifornia Boiler, Hot-Water Heating And Steam Fitting (C-4) Contractor Licensing Exam Prep Book Reference Package\u003c\/h1\u003e\n\n\u003cp\u003ePrepare for the \u003cstrong\u003eCalifornia Boiler, Hot-Water Heating and Steam Fitting (C-4) Contractor\u003c\/strong\u003e licensing examination with a focused book reference package built around the major trade subjects identified by the California Contractors State License Board. This package supports candidates studying boiler systems, hot-water heating, steam fitting, hydronic heating, radiant heating, planning and estimating, system installation, maintenance, repair, retrofit work, and construction safety.\u003c\/p\u003e\n\n\u003cp\u003eThe California C-4 classification covers contractors who install, service, and repair power boiler installations, hot-water heating systems, and steam fitting. The classification includes equipment and components associated with these systems, such as fire-tube and water-tube steel power boilers, low-pressure hot-water heating boilers, piping, fittings, valves, gauges, pumps, radiators, convectors, fuel-oil tanks and lines, chimneys, flues, heat insulation, and associated solar heating equipment.\u003c\/p\u003e\n\n\u003cp\u003eThis reference package includes the \u003cstrong\u003e2025 California Mechanical Code\u003c\/strong\u003e, \u003cstrong\u003e2025 California Plumbing Code\u003c\/strong\u003e, \u003cstrong\u003eBoiler Operator’s Guide, 5th Edition\u003c\/strong\u003e, \u003cstrong\u003eModern Hydronic Heating for Residential and Light Commercial Buildings by John Siegenthaler, P.E., 2022\u003c\/strong\u003e, \u003cstrong\u003eRadiant Floor Heating, Second Edition\u003c\/strong\u003e, \u003cstrong\u003eCal\/OSHA General Industry \u0026amp; Electrical Safety Orders\u003c\/strong\u003e, and \u003cstrong\u003eCal\/OSHA Construction \u0026amp; Electrical Safety Orders\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe California C-4 examination is a \u003cstrong\u003eclosed-book exam\u003c\/strong\u003e. Reference materials cannot be used during testing. The purpose of this package is therefore to help candidates study the technical principles, terminology, system components, calculations, installation methods, troubleshooting practices, and safety requirements before examination day.\u003c\/p\u003e\n\n\u003cp\u003eSuccessful preparation requires more than memorizing boiler terminology. Candidates should understand how boiler projects are planned, how systems are removed and replaced, how commercial and industrial systems differ from residential hydronic applications, how components interact, and how boiler systems are maintained, repaired, and retrofitted safely.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eExam Details\u003c\/h2\u003e\n\n\u003cp\u003eThe current California Contractors State License Board C-4 examination study guide applies to examinations scheduled on or after March 1, 2024. The examination is divided into five major content areas:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlanning and Estimating:\u003c\/strong\u003e 15%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoiler System Removal, Preparation, and Installation:\u003c\/strong\u003e 29%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecialty Boiler Installation:\u003c\/strong\u003e 17%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoiler System Maintenance, Repair, and Retrofit:\u003c\/strong\u003e 22%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety:\u003c\/strong\u003e 17%\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePlanning and Estimating\u003c\/strong\u003e represents approximately 15 percent of the examination. Candidates should prepare to plan boiler projects and estimate boiler work. This can involve reviewing project requirements, identifying equipment and material needs, evaluating existing conditions, determining quantities, and understanding how system design affects installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBoiler System Removal, Preparation, and Installation\u003c\/strong\u003e is the largest published examination category at approximately 29 percent. This section includes removing old boiler systems, preparing the job site for new equipment, installing new boiler systems, testing the installation, and completing the work.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecialty Boiler Installation\u003c\/strong\u003e represents approximately 17 percent. The CSLB outline includes commercial boiler systems, industrial boiler systems, school and hospital boiler systems, and residential hydronic boiler systems. Candidates should understand that different applications can involve different equipment configurations, controls, piping arrangements, operating conditions, and installation considerations.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBoiler System Maintenance, Repair, and Retrofit\u003c\/strong\u003e represents approximately 22 percent. This section includes maintaining boiler systems, repairing systems, and performing retrofit work. Preparation should include component identification, troubleshooting concepts, replacement procedures, system evaluation, and safe maintenance practices.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSafety\u003c\/strong\u003e represents approximately 17 percent and includes personnel safety, job-site safety, confined-space work, and dangerous materials. Boiler and steam work can involve heat, pressure, electrical equipment, fuel systems, confined spaces, heavy equipment, and other hazards that require disciplined safety practices.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eClosed Book Test\u003c\/h2\u003e\n\n\u003cp\u003eThe California Boiler, Hot-Water Heating and Steam Fitting (C-4) examination is a \u003cstrong\u003eclosed book test\u003c\/strong\u003e. No reference materials may be used during the examination.\u003c\/p\u003e\n\n\u003cp\u003eThe examination uses multiple-choice questions with four answer choices and one best answer. Some questions require mathematical computation, and a calculator is provided during testing.\u003c\/p\u003e\n\n\u003cp\u003eBecause the test is closed book, candidates should use the reference package during preparation to develop working knowledge rather than relying only on the ability to locate information. By exam day, candidates should be able to identify boiler components, understand hydronic and steam-system principles, interpret system conditions, select appropriate procedures, and recognize safe work practices without consulting a reference.\u003c\/p\u003e\n\n\u003cp\u003eFor installation preparation, candidates should understand removal procedures, site preparation, piping, valves, pumps, gauges, controls, radiators, convectors, venting, and related system components. They should also be familiar with system testing and completion procedures.\u003c\/p\u003e\n\n\u003cp\u003eFor maintenance and repair, candidates should develop familiarity with common boiler-system components, operating conditions, troubleshooting principles, and retrofit considerations. Hydronic study should address circulation, heat distribution, piping arrangements, and controls.\u003c\/p\u003e\n\n\u003cp\u003eClosed-book preparation should also include calculations relevant to boiler and hydronic work. Candidates may encounter questions requiring measurements, system quantities, temperatures, capacities, flow-related reasoning, or other mathematical applications associated with trade work.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eLicensing Steps\u003c\/h2\u003e\n\n\u003cp\u003eThe California Contractors State License Board administers the C-4 Boiler, Hot-Water Heating and Steam Fitting contractor classification. Applicants must satisfy applicable experience, application, examination, and license-issuance requirements before receiving an active contractor license.\u003c\/p\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm the C-4 classification.\u003c\/strong\u003e Determine that the contracting work you plan to perform falls within the California Boiler, Hot-Water Heating and Steam Fitting classification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeet qualifying experience requirements.\u003c\/strong\u003e The qualifying individual generally must document four years of qualifying experience in the classification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument qualifying work.\u003c\/strong\u003e Experience must meet CSLB standards regarding the level, duration, and nature of the work performed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubmit the contractor license application.\u003c\/strong\u003e Provide the applicant, business, classification, and qualifying-individual information required by CSLB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete CSLB application review.\u003c\/strong\u003e CSLB evaluates the submitted qualifications and determines which examinations apply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare for California Law and Business.\u003c\/strong\u003e Qualifying individuals who are required to test generally must complete the standard California Law and Business examination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare for the C-4 trade examination.\u003c\/strong\u003e Study Planning and Estimating, Boiler System Removal, Preparation and Installation, Specialty Boiler Installation, Maintenance, Repair and Retrofit, and Safety.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete the required examinations.\u003c\/strong\u003e Take the examinations assigned by CSLB unless an approved examination waiver applies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete license-issuance requirements.\u003c\/strong\u003e Satisfy applicable bonding, fingerprinting, workers' compensation, fee, and other requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintain the contractor license.\u003c\/strong\u003e Keep required licensing information, bonds, insurance documentation when applicable, and renewals current.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eState Requirements\u003c\/h2\u003e\n\n\u003cp\u003eCalifornia defines a C-4 Boiler, Hot-Water Heating and Steam Fitting contractor as a contractor who installs, services, and repairs power boiler installations, hot-water heating systems, and steam fitting.\u003c\/p\u003e\n\n\u003cp\u003eThe scope includes fire-tube and water-tube steel power boilers and hot-water heating low-pressure boilers. It also includes steam fitting and piping, fittings, valves, gauges, pumps, radiators, convectors, fuel-oil tanks, fuel-oil lines, chimneys, flues, heat insulation, and other equipment associated with these systems, including solar heating equipment.\u003c\/p\u003e\n\n\u003cp\u003eBecause this classification includes installation, service, and repair, candidates should prepare for both new construction and existing-system work. Exam preparation should address removal, replacement, commissioning, maintenance, troubleshooting, and retrofit situations rather than focusing only on new boiler installation.\u003c\/p\u003e\n\n\u003cp\u003eSpecialty applications are also part of the published examination outline. Candidates should study commercial, industrial, school and hospital, and residential hydronic boiler systems and recognize that equipment selection, operating requirements, piping arrangements, controls, and safety considerations can vary between these applications.\u003c\/p\u003e\n\n\u003cp\u003eThe qualifying individual generally must document \u003cstrong\u003efour years of qualifying experience\u003c\/strong\u003e. CSLB reviews the submitted work history to determine whether the applicant meets the requirements for the requested classification.\u003c\/p\u003e\n\n\u003cp\u003eQualifying individuals who are required to test generally complete the California Law and Business examination in addition to the C-4 trade examination. Examination waivers may apply under qualifying CSLB circumstances.\u003c\/p\u003e\n\n\u003cp\u003eApplicants must also satisfy applicable license-issuance requirements after completing the required examination and application steps. These requirements can include bonding, fingerprinting, workers' compensation documentation, and other requirements based on the applicant and business entity.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eReference Books\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2025 California Mechanical Code\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis reference supports preparation involving mechanical systems, boilers, hydronic heating, equipment installation, combustion and venting concepts, piping, controls, and mechanical requirements relevant to C-4 work.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003e2025 California Plumbing Code, California Code of Regulations, Title 24\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis reference supports study involving piping systems, valves, water-related components, drainage and supply concepts, materials, and code requirements that can intersect with boiler and hot-water heating installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eBoiler Operator’s Guide, 5th Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis reference supports preparation involving boiler operation, components, controls, maintenance, troubleshooting, water treatment concepts, combustion, safety, and practical boiler-system operation.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eModern Hydronic Heating for Residential and Light Commercial Buildings, John Siegenthaler, P.E., 2022\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis reference supports study of hydronic system design, piping arrangements, heat distribution, circulators, controls, boilers, radiant systems, system components, and residential or light-commercial heating applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eRadiant Floor Heating, Second Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis reference supports preparation involving radiant-floor system principles, tubing layouts, heat distribution, hydronic applications, controls, installation methods, and related heating-system concepts.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eCal\/OSHA General Industry \u0026amp; Electrical Safety Orders\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis reference supports preparation involving workplace hazards, electrical safety, equipment, personal protective equipment, employer responsibilities, and occupational safety principles relevant to boiler work.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eCal\/OSHA Construction \u0026amp; Electrical Safety Orders\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis reference supports study involving construction-site hazards, electrical safety, ladders, tools, material handling, confined spaces, personal protection, and other safety concerns associated with boiler, heating, and steam-fitting work.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eTest Information and Study Materials\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrioritize Boiler System Removal, Preparation, and Installation.\u003c\/strong\u003e At approximately 29 percent, this is the largest published section of the C-4 examination. Review removal of existing systems, preparation for new installations, installation procedures, testing, and project completion.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eStudy Maintenance, Repair, and Retrofit thoroughly.\u003c\/strong\u003e This category represents approximately 22 percent. Candidates should understand system evaluation, troubleshooting, component replacement, maintenance procedures, and retrofit considerations.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eReview Specialty Boiler Installations.\u003c\/strong\u003e Study commercial, industrial, school and hospital, and residential hydronic boiler systems. Focus on the differences in system requirements and operating conditions rather than treating every boiler installation as identical.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBuild strong hydronic knowledge.\u003c\/strong\u003e Review circulators, piping arrangements, heat emitters, flow paths, radiant heating, controls, system zoning, and other concepts involved in moving and distributing heat through water-based systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eUnderstand boiler components.\u003c\/strong\u003e Candidates should be familiar with boilers, pumps, valves, fittings, gauges, radiators, convectors, piping, chimneys, flues, fuel systems, insulation, and controls associated with C-4 installations.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePractice Planning and Estimating.\u003c\/strong\u003e Review plans, specifications, site conditions, equipment needs, material quantities, labor considerations, and project sequencing. Practice calculations that support trade estimating and system installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eStudy Safety consistently.\u003c\/strong\u003e Safety represents approximately 17 percent of the examination. Review personnel safety, job-site safety, confined spaces, dangerous materials, electrical hazards, high-temperature systems, pressurized equipment, lifting, and other risks associated with boiler work.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePay attention to pressure and temperature.\u003c\/strong\u003e Boiler and steam-fitting work involves systems where pressure and heat are fundamental operating conditions. Candidates should understand the importance of gauges, controls, valves, safe operating procedures, and system testing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eReview venting and combustion-related concepts.\u003c\/strong\u003e Boiler systems may include fuel-fired equipment, chimneys, flues, and related components. Study how these elements fit into safe system installation and operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePractice closed-book recall.\u003c\/strong\u003e Use the references while learning each subject, then test yourself without them. The actual C-4 examination does not permit reference books, so preparation should gradually reduce dependence on study materials.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eUse incorrect answers as a study tool.\u003c\/strong\u003e When a practice question is missed, determine whether the underlying issue involves a boiler component, hydronic principle, installation procedure, estimating calculation, repair method, or safety requirement and return to that subject for additional review.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow 1 Exam Prep Helps You Reach Your Goal\u003c\/h2\u003e\n\n\u003cp\u003e1 Exam Prep supports California Boiler, Hot-Water Heating and Steam Fitting contractor candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation, and a structured approach to the five major C-4 examination categories.\u003c\/p\u003e\n\n\u003cp\u003eThe book reference package helps candidates organize study around Planning and Estimating, Boiler System Removal and Installation, Specialty Boiler Installation, Maintenance and Repair, and Safety. Breaking the examination into these categories can make a broad mechanical trade easier to study systematically.\u003c\/p\u003e\n\n\u003cp\u003eThe California Mechanical and Plumbing Codes support code-related preparation, while the Boiler Operator’s Guide can reinforce boiler operation, components, controls, maintenance, and troubleshooting concepts.\u003c\/p\u003e\n\n\u003cp\u003eModern Hydronic Heating provides additional depth for hydronic-system design and operation, including piping, circulation, controls, heat distribution, and residential or light-commercial applications. Radiant Floor Heating supports more focused preparation involving hydronic radiant systems and floor-heating installations.\u003c\/p\u003e\n\n\u003cp\u003eThe Cal\/OSHA references strengthen safety preparation for boiler, steam, and hot-water heating work. Candidates can use them to review electrical hazards, confined spaces, personal protective equipment, tools, material handling, and other workplace responsibilities.\u003c\/p\u003e\n\n\u003cp\u003eBecause the C-4 examination is closed book, preparation should gradually move from reference-based study to independent recall. Candidates can study a system or procedure, answer questions without the books, identify weak areas, and return to the appropriate reference for targeted reinforcement.\u003c\/p\u003e\n\n\u003cp\u003e1 Exam Prep's goal is to help candidates build an organized study routine, strengthen boiler and hydronic heating knowledge, improve familiarity with installation and repair procedures, and approach the California C-4 contractor licensing examination with a focused preparation structure.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eIs the California C-4 exam closed book?\u003c\/h2\u003e\n\n\u003cp\u003eYes. The California Boiler, Hot-Water Heating and Steam Fitting C-4 examination is a \u003cstrong\u003eclosed-book examination\u003c\/strong\u003e. Reference materials cannot be used during testing.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat subjects are covered on the California C-4 exam?\u003c\/h2\u003e\n\n\u003cp\u003eThe examination covers Planning and Estimating, Boiler System Removal, Preparation and Installation, Specialty Boiler Installation, Boiler System Maintenance, Repair and Retrofit, and Safety.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat is the largest section of the C-4 examination?\u003c\/h2\u003e\n\n\u003cp\u003eBoiler System Removal, Preparation, and Installation is the largest published section at approximately 29 percent.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eDoes the C-4 exam cover boiler maintenance and repair?\u003c\/h2\u003e\n\n\u003cp\u003eYes. Boiler System Maintenance, Repair, and Retrofit represents approximately 22 percent of the published examination outline.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eDoes the C-4 exam cover hydronic heating?\u003c\/h2\u003e\n\n\u003cp\u003eYes. Residential hydronic boiler systems are included in the Specialty Boiler Installation section, and hydronic concepts are relevant to hot-water heating work within the C-4 classification.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eDoes the exam cover commercial and industrial boiler systems?\u003c\/h2\u003e\n\n\u003cp\u003eYes. Specialty Boiler Installation includes commercial boiler systems, industrial boiler systems, school and hospital boiler systems, and residential hydronic boiler systems.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eDoes the C-4 examination include math?\u003c\/h2\u003e\n\n\u003cp\u003eYes. Some questions require mathematical computation, so candidates should practice measurements, quantities, estimating, and other calculations relevant to boiler and heating-system work.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat safety subjects are covered?\u003c\/h2\u003e\n\n\u003cp\u003eThe published Safety category includes personnel safety, job-site safety, confined-space work, and dangerous materials.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat type of work does a California C-4 contractor perform?\u003c\/h2\u003e\n\n\u003cp\u003eA C-4 contractor installs, services, and repairs power boiler installations, hot-water heating systems, steam fitting, associated piping, valves, gauges, pumps, radiators, convectors, fuel systems, chimneys, flues, insulation, and related equipment within the classification.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eAre the reference books used during the actual C-4 examination?\u003c\/h2\u003e\n\n\u003cp\u003eNo. The examination is closed book. The references are intended for study before testing so candidates can build the knowledge needed to answer questions without books during the examination.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhy is hydronic heating study important for C-4 preparation?\u003c\/h2\u003e\n\n\u003cp\u003eHydronic systems are part of hot-water heating work and can involve boilers, circulators, piping, controls, radiators, radiant systems, and other heat-distribution components relevant to the C-4 classification.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow should I use this reference package?\u003c\/h2\u003e\n\n\u003cp\u003eStudy one examination category at a time, use the appropriate books to strengthen technical understanding, practice applying the material without references, and return to weaker subjects for additional review before the exam.\u003c\/p\u003e\n\n","brand":"1 Exam Prep","offers":[{"title":"Default Title","offer_id":50596507582521,"sku":null,"price":1245.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1789\/0861\/files\/CABOOKS-BOILERANDSTEAM_C-4.jpg?v=1791302281","url":"https:\/\/1examprep.com\/products\/california-boiler-hot-water-heating-and-steam-fitting-c-4-contractor-licensing-exam-prep-book-reference-package","provider":"1 Exam Prep","version":"1.0","type":"link"}