P2 · area 05 · subtopic 0502
Sizing of the System
4 percent of the P2 Commercial Plumbing Inspector exam. At 60 questions, that is roughly 2 to 3 questions, each with about 150 seconds of budget including the lookup.
- Exam
- P2
- Area
- Sanitary Drainage
- Weight
- 4%
- Questions
- ~2 to 3
What this subtopic covers
Sizing and installation of the building drain, building sewer, branches and stacks.
Outline caveat
ICC's published P2 outline is labeled 2015. Confirm the current outline in the exam catalog before testing.
How to drill it
- Find the chapter of the International Plumbing Code that carries this subject and read it once for structure, not retention: what lives here, what gets sent elsewhere, which tables exist.
- Write your own plain-language phrases for what this subtopic covers, then note the code's terms beside them. Mismatches between the two columns are exactly where exam questions cost you time.
- Run timed lookups: pick a requirement named in the descriptor above, start a stopwatch, find the governing text in your book, stop. Log the seconds. Past two minutes is a miss even when the answer is right.
- Weight your reps to the number above. Roughly 2 to 3 questions means this subtopic deserves repeated timed reps inside its area session.
2024 IRC Fast-TabsPre-printed tabs for the 2024 edition. Place them yourself; the placement is the study.Check priceThe rest of area 05: Sanitary Drainage (13%)
| Subtopic | Weight | |
|---|---|---|
| 0501 | Materials and Fittings | 3% |
| 0503 | Valves, Sumps, Ejectors, and Cleanouts | 3% |
| 0504 | Indirect Waste | 3% |
The kit that goes on the table
2024 IRCThe book itself
2021 IRCIf you register on 20212024 Fast-TabsPlace them yourself
Construction Master ProFeet-inch math, no errorsMatch the book and tabs to the edition you register for.Confirm which, first.
The 120-second study sheet
One page: every topic weight on all four residential exams, the plain-language to code-language glossary, and the two-week study sequence. Free, straight to your inbox.
No spam, no selling your address. One useful sheet and occasional exam-prep notes.