Study Materials
Master every topic of the exam, in plain language.
Planning, Plans, Permits & Estimating
Before any pipe is joined, a plumber reads the plans, pulls the correct permits, and estimates materials and labor. This chapter covers plan reading, the inspection sequence, takeoffs, and the code cycle that governs the work.
Water Supply and Distribution
The water supply system delivers safe potable water at adequate pressure to every fixture while preventing contamination of the public supply. This chapter covers service and distribution sizing, pressure control, backflow protection, approved materials, and pipe support.
Drainage, Waste and Vent (DWV)
The DWV system carries waste away by gravity while venting keeps air pressure balanced so trap seals are not lost. This chapter covers drain sizing by fixture units, slope, traps and trap seals, venting, cleanouts, and interceptors.
Fixtures & Water Heaters
Plumbing fixtures and water heaters are where the system meets the user, and they are among the most heavily tested topics on the C-36 exam. This chapter covers how fixtures must be spaced, counted, and connected, and then works through the many safety requirements that surround water heater installation: temperature and pressure relief, seismic strapping, drain pans, combustion air, venting, and thermal expansion control. Nearly all of these requirements exist to prevent scalding, explosion, flooding, or carbon monoxide poisoning, so examiners expect you to know not just the numbers but the reasons behind them.
Fuel Gas Piping
Fuel gas piping carries an invisible, explosive fuel through a building, so precision matters at every step. A C-36 plumber must size the pipe so each appliance receives enough gas at the right pressure, choose materials rated for the service, and install the safety fittings—shutoffs, sediment traps, regulators, and connectors—that keep the system controllable and clean. Finally, every gas system must be pressure-tested and proven leak-free before it is placed in service. This chapter walks through sizing, materials, fittings, testing, and the basics of appliance venting.
Job-Site Safety
Plumbing work exposes crews to some of construction's deadliest hazards: collapsing trenches, toxic and oxygen-poor confined spaces, contaminated water, open flame, and falls. California's Cal/OSHA regulations in Title 8 set enforceable rules to control each of these, and a C-36 contractor is legally responsible for following them. This chapter covers trenching and excavation, confined-space entry, cross-connection public-health protection, hot-work fire safety, personal protective equipment, and ladders and fall protection. Knowing these rules protects lives and keeps a contractor's license and record clean.
Practice by topic
Jump straight into free practice questions for any single CSLB C-36 Plumbing topic.