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According to the CSLB, “A plumbing contractor provides a means for a supply of safe water, ample in volume and of suitable temperature for the purpose intended and the proper disposal of fluid waste from the premises in all structures and fixed works. This classification includes but is not limited to:

(a)Complete removal of waste from the premises or the construction and connection of on-site waste disposal systems;

(b)Piping, storage tanks and venting for a safe and adequate supply of gases and liquids for any purpose, including vacuum, compressed air and gases for medical, dental, commercial and industrial uses;

(c)All gas appliances, flues and gas connections for all systems including suspended space heating units. This does not include forced warm air units;

(d)Water and gas piping from the property owner’s side of the utility meter to the structure or fixed works;

(e) Installation of any type of equipment to heat water, or fluids, to a temperature suitable for the purposes listed in this section, including the installation of solar equipment for this purpose; and

(f)The maintenance and replacement of all items described above and all health and safety devices such as, but not limited to, gas earthquake valves, gas control valves, back flow preventors, water conditioning equipment and regulating valves.”

Requirements for Licensure

The California Contractors State License Board requires a minimum of four years journeyman-level experience in order to apply for a California Contractors license.

Plumbing Exam (C-36)

The exam is a closed book exam and has approximately 100 questions that must be answered in 2.5 hours. The exams are given on a computer at one of the many testing centers throughout California. An appointment is needed and can be made once an application has been accepted.

Some of the topics covered in the exam include:

  • Planning & Estimating
  • Rough-in & Tough-out Plumbing Systems
  • Finish Plumbing Installations
  • Service, Repair & Remodel Plumbing Systems
  • Worker and Job-site Safety

How to Prepare for the Exam

Once the CSLB has approved your application, you will be informed of the testing date. We recommend that you give yourself plenty of time to prepare and study, preferably months. One of the most effective ways to prepare for the exam is by using the Peerless Plumbing (C-36) Study Guide book. The book includes hundreds of pages of relevant content that is covered on the state exam and also loaded with close to a thousand multiple choice questions.