The exam content shown below only lists main category headings. Please consult the PSI exam bulletin from the button below for more detailed information about subject sub-categories.
| Subject Areas | # of Questions |
|---|---|
| Plumbing Fundamentals and Safety | 5 |
| Materials, Uses and Specifications | 6 |
| Traps, Interceptors and Backwater Valves | 4 |
| Plumbing Fixtures, Fixture Fittings and Plumbing Appliances | 4 |
| Water Supply Systems | 8 |
| Backflow Prevention | 10 |
| Drain, Waste and Vent Systems | 13 |
| Special Topics | 3 |
| Gas Appliances and Piping | 40 |
| Plumbing Mathematics | 7 |
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