ICC P3 study plan
ICC P3 · Give each week a clear focus.
8 weeks · About 7 hours per week
General Administration and Plumbing Plan Review Fundamentals
Map the scope of the plumbing inspector's administrative role: permit application review, plan submittal completeness, and inspection sequencing
Define the plan-review workflow step by step, from submittal intake through approval, correction notice, and re-submittal
Identify which plumbing system drawings, schedules, and riser diagrams a reviewer must confirm are present before technical review begins
Explain how code official duties, alternative materials and methods requests, and approvals are documented
Distinguish the administrative chapter requirements from the technical chapters so you know which rules govern process versus design
Your checkpoint
A one-page flowchart of the plan-review and inspection process plus a 25-item checklist of submittal components, both produced closed-book and self-scored to 90% accuracy
General Administration and Plumbing Plan Review Fundamentals & Plumbing Fixtures and Fixture Fittings
Interpret occupant-load and fixture-count calculations to verify minimum fixture quantities from a given occupancy and use
Match each fixture type to its required clearance, access, and installation conditions
Verify fixture fitting requirements: supply stops, trap seal protection, backflow protection at hose bibs and flush valves, and fixture tailpiece sizing
Review a fixture schedule against fixture-unit values and note every correction needed
Recite the fixture-unit assignments used for drainage and water-supply sizing without reference materials
Your checkpoint
Complete a written fixture-count and fixture-unit exercise for three different occupancies and score at least 80% on your own graded review
Water Heaters
Classify water heaters by type and state the installation limits and approval conditions for each
Determine temperature, pressure, and relief valve requirements including sizing basis, discharge piping, and termination
Apply combustion air, venting, and clearance rules to a gas-fired water heater installation
Verify seismic strapping, drain pan, and drain-line requirements for a given installation scenario
Calculate required relief valve capacity and identify the three most common water-heater plan-review rejection reasons
Your checkpoint
A completed water-heater installation review worksheet covering five scenarios, with every deficiency cited to the applicable requirement and a self-assessed score of 80% or higher
Water Supply and Distribution
Size a water distribution system from fixture units, developed length, and pressure loss using the applicable tables
Trace a supply system from the source through the meter, backflow prevention, distribution mains, and branches, and identify each required valve and device
Evaluate backflow protection selection for cross-connections in the scenarios you are most likely to see on the exam
Determine required pipe support, protection from freezing, and protection from corrosion for a given routing
Diagnose pressure problems by applying the minimum residual pressure and pressure-loss criteria
Your checkpoint
A full water-supply sizing calculation for a two-story building, showing fixture units, developed length, and pipe sizes at each segment, verified to at least 90% self-graded accuracy
Sanitary Drainage, Vents, and Storm Drainage
Size and slope horizontal drainage branches and building drains using drainage fixture units and the slope tables
Determine vent requirements: individual, common, wet, and stack venting, plus vent terminal location limits
Verify trap requirements, trap seal protection, and the conditions under which a trap primer is needed
Apply cleanout spacing and accessibility requirements to a drainage layout
Calculate storm drainage demand and size roof drains, leaders, and storm building drains for a given rainfall rate
Your checkpoint
A marked-up drainage, vent, and storm plan set with all pipe sizes, slopes, cleanouts, and vent terminals annotated and a written justification list of at least 15 decisions
Fuel Gas Piping and Special Plumbing Systems
Trace a fuel gas piping system from the point of delivery through the meter, regulator, and appliances and identify each required valve and sediment trap
Size gas piping using the longest-length and appliance-demand method for a multi-appliance layout
Apply combustion air, appliance venting, and clearance-to-combustible requirements to both Category I and direct-vent appliances
Identify testing, purging, and bonding requirements for gas piping installation and inspection
Recognize the special plumbing systems most often tested: indirect waste, special wastes, grease interception, and medical or laboratory waste where applicable
Your checkpoint
A completed gas-piping sizing and venting review of a five-appliance layout, including a deficiency list of at least 12 items, self-graded to 80% or better
General Administration and Plumbing Plan Review Fundamentals & Plumbing Fixtures and Fixture Fittings & Water Heaters & Water Supply and Distribution
Re-solve every missed question type from weeks 1 through 4 without notes and log the underlying rule for each
Cross-link administrative requirements to technical outcomes by writing ten plan-review comments that cite both a process step and a technical requirement
Build a personal reference index of the tables and criteria you must be able to locate quickly during an open-book exam
Practice timed answering on multi-domain scenarios that combine water supply, fixtures, and water heating in a single building
Your checkpoint
A written remediation log covering at least 40 previously missed items, closed-book re-test score of 85% or better on a 50-question mix of domains 1 through 4
Sanitary Drainage, Vents, and Storm Drainage & Fuel Gas Piping and Special Plumbing Systems
Complete four timed full-scope practice exams under exam conditions and record the score for each domain separately
Re-drill any domain scoring below 80% until two consecutive practice sets clear the threshold
Convert every remaining weak area into a one-line rule statement you can recall on demand
Rehearse time allocation and question-skipping strategy so that no item is left blank
Your checkpoint
A final scorecard showing the best score per domain at 80% or higher and a one-page summary of the 20 rules you are most likely to forget
Milestones
Week 2: Explain the full plan-review workflow and correctly perform a fixture-count calculation from an occupancy description, closed-book, without referring to notes
Week 4: Complete one full water-supply sizing problem end to end and cite the governing requirement for every step
Week 6: Score 80% or higher on a self-written 60-question exam split evenly across all six domains
Week 8: Reach 80% or higher in every domain on a timed full-scope practice exam, with no domain below 75% on any single attempt