ICC P1 study guide
ICC P1 · Work through your exam, one topic at a time.
This page is an independent study resource for the ICC Residential Plumbing Inspector (P1) certification exam. P1 sits within the International Code Council's credentialing program for building safety professionals, whose public catalog covers inspection of residential plumbing systems. The ICC P1 study guide has 8 sections and about 2,653 words.
01Administration and General Requirements
The Administration and General Requirements domain tests how the plumbing code is enforced before and after work is installed: permits, submittals, inspections, testing, approved materials, and the code official’s authority over unsafe or existing systems. P1 questions often turn on whether an activity needs a permit and which test or inspection applies.
346 words, about 2 min02Fixtures and Fixture Fittings
Fixtures and Fixture Fittings tests whether you can select and install plumbing fixtures to meet minimum facility counts, clearance dimensions, accessibility rules, and fixture-specific requirements. The exam expects you to apply occupancy tables and dimension checks rather than just know fixture names.
313 words, about 2 min03Water Heaters
Water Heaters covers installation safety: relief protection, discharge piping, drain pans, thermal expansion, combustion air, venting, and seismic restraint. P1 questions frequently test the temperature and pressure relief valve because improper discharge piping is both common and dangerous.
348 words, about 2 min04Water Supply and Distribution
Water Supply and Distribution tests sizing, pressure control, backflow protection, materials, joints, valves, and testing. The exam expects you to connect fixture demand to pipe size and to recognize when a pressure-reducing valve or backflow preventer is required.
324 words, about 2 min05Sanitary Drainage
Sanitary Drainage tests whether you can size and slope drainage piping, select proper fittings, and provide cleanouts and maintenance access. The exam emphasizes drainage fixture units, slope by pipe size, and fittings that do not create a blockage or trap-seal problem.
330 words, about 2 min06Vents and Venting
Vents and Venting tests the venting system that protects trap seals: vent types, sizing, wet venting, air admittance valves, and terminal locations. P1 questions often ask whether a vent is properly sized and whether its termination is high enough and far enough from openings.
342 words, about 2 min07Traps, Interceptors and Special Wastes
Traps, Interceptors and Special Wastes tests trap seals, trap arm length, prohibited trap arrangements, grease and oil interception, and special waste handling. The exam focuses on protecting the trap seal and preventing fats, oils, grease, sand, or chemicals from entering the drainage system.
329 words, about 2 min08Storm Drainage and Fuel Gas Piping
Storm Drainage and Fuel Gas Piping combines two distinct systems. Storm drainage questions test roof drain sizing, rainfall intensity, secondary drainage, and leaders; fuel gas questions test piping materials, shutoff valves, sediment traps, bonding, and pressure testing.
321 words, about 2 min