CSLB Plumbing (C-36): Study Guide

What this book covers

The Peerless Plumbing (C-36) Study Guide Book prepares you for the trade portion of the California CSLB contractor license exam. Per the state's classification, a C-36 contractor installs, alters, and repairs water supply systems, drainage systems, gas lines, sewers, and plumbing fixtures in residential and commercial structures. This printed book covers the subjects the state tests. See the official CSLB C36 classification.

Book chapters

1. Water supply systems
2. Gas systems
3. Materials & fixtures
4. Drainage system
5. Vent system
6. Steam & hot water boilers
7. Cleanouts
8. Welding
9. Tools
10. Swimming pools
11. Blueprint reading
12. Septic tanks & drainfields
13. Safety
14. Mathematics review

Sample questions — Try our free practice test

1. Unless listed as flammable-vapor-ignition-resistant, how high above a residential garage floor must a gas water heater’s pilots, burners, and burner-igniter devices be installed?
   A. 12 inches · B. 18 inches ✓ · C. 24 inches · D. 36 inches
   Answer basis: 2025 CPC §507.13.
2. Under the 2025 California Plumbing Code, what is the maximum permitted distance between gas utilization equipment and its accessible manual shutoff valve?
   A. 3 feet · B. 4 feet · C. 6 feet ✓ · D. 10 feet
   Answer basis: 2025 CPC §1212.6.
3. Of the following, which single-wall appliance vent connection is permitted?
   A. Horizontally in a plastered partition · B. Vertically through the attic · C. Vertically through the floor to the roof · D. Through the exterior wall to the outer air ✓