ICC P3 study guide
ICC P3 · Work through your exam, one topic at a time.
The ICC Plumbing Plans Examiner (P3) is one of the professional credentialing examinations offered by the International Code Council, the organization behind the International Codes. It is aimed at code officials, plan reviewers, and design professionals who review plumbing construction documents for compliance with the plumbing provisions of the adopted codes, rather than at installers in the field. The ICC P3 study guide has 6 sections and about 2,376 words.
01General Administration and Plumbing Plan Review Fundamentals
The administrative provisions set the rules of the game: the code official's authority to approve or reject, the work exempt from permit, what must be submitted for review, and how inspections are sequenced. A permit is required for new installation, extension, alteration, or replacement of piping and for fixtures newly connected to the system.
330 words, about 2 min02Plumbing Fixtures and Fixture Fittings
Know the occupancy-based minimum fixture table, accessibility clearances, and the flow and flush limits on fittings. Typical limits: water closets 1.6 gpf maximum, urinals 1.0 gpf, showerheads 2.5 gpm at 80 psi.
320 words, about 2 min03Water Heaters
Every storage water heater needs a temperature and pressure (T&P) relief valve, sized to match or exceed the heater's maximum Btu/h input and pressure rating, installed within the top 6 in. of the tank, and never valved off.
348 words, about 2 min04Water Supply and Distribution
Water piping is sized from water-supply fixture units using the available pressure at the source, the developed length (including equivalent lengths for fittings and valves), elevation loss, and device losses. Confirm residual pressure at the most remote fixture: about 8 psi for gravity flush tanks, 15 psi for flushometer valves.
323 words, about 2 min05Sanitary Drainage, Vents, and Storm Drainage
Drainage sizing starts with drainage fixture units (DFU) from the fixture-unit table, summed on each branch, stack, and the building drain, then read against the sizing table for the chosen slope. Keep DFU and water-supply fixture units strictly separate - mixing them is the most common arithmetic trap.
738 words, about 4 min06Fuel Gas Piping and Special Plumbing Systems
Gas sizing converts appliance input to cubic feet per hour (natural gas is about 1,000 Btu per cubic foot at 0.60 specific gravity) and reads the gas table for the pipe length and allowable pressure drop (typically 0.5 in. for low-pressure systems).
317 words, about 2 min