ICC P2 study materials
ICC P2 study resources

ICC P2 study plan

ICC P2 · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

Sanitary Drainage, Traps, and Vents

  • Draw a complete drain-waste-vent isometric for a two-bathroom dwelling and label every trap, vent type, and fitting from each fixture to the building drain.

  • Compute drainage fixture-unit loads for a supplied fixture schedule, showing each conversion and the arithmetic for the building drain and building sewer.

  • Classify individual, common, wet, circuit, island, and air-admittance vents, and state the code condition that permits or restricts each.

  • Write a checklist of slope, sizing, and change-of-direction rules that apply to horizontal drains and building sewers.

  • Identify prohibited fittings and prohibited connections on a horizontal drain run and justify each with the governing rule.

Your checkpoint

A single-page DWV reference sheet plus a hand-drawn isometric with all traps and vents labeled and fixture-unit math shown line by line.

Week 2

Sanitary Drainage, Traps, and Vents & Fixtures, Fixture Fittings, and Water Heaters

  • Solve 15 trap-arm length and vent-takeoff distance problems, showing formula, substitution, answer, and the rule used.

  • Explain the triggers for backwater valves, interceptors, sump pumps, and sewage ejectors, and where each must be installed.

  • Build a table of special drainage situations and the extra device or protection each requires.

  • Cross-check setting and access requirements for eight common fixtures, and note where fixture placement interacts with drainage rules.

Your checkpoint

A worked 15-problem calculation set on trap arms and vent distances, every answer traceable to a cited rule, plus a one-page special-drainage table.

Week 3

Fixtures, Fixture Fittings, and Water Heaters

  • Compute water heater requirements: relief valve sizing and placement, thermal expansion control, drain pan sizing and discharge termination, and anchorage.

  • Verify clearances and rough-in dimensions for water closets, lavatories, urinals, showers, and bathtubs against the code's dimensional tables.

  • Differentiate fixture fitting requirements for backflow protection, tempering devices, flush valves, and hand-held showers.

  • Explain the accessibility-linked fixture requirements and identify the fixtures and spaces they govern.

  • Assemble a defect list for three photographed-in-words fixture installations described only by dimensions and connections.

Your checkpoint

A dimensioned bathroom-group layout drawing with every clearance annotated to a code table value, plus a five-item defect list.

Week 4

Water Supply and Distribution

  • Size a water service and distribution system from fixture-unit demand, applying meter, developed-length, and elevation adjustments.

  • Apply minimum residual pressure and pressure-loss rules at the meter, at the topmost fixture, and at the most remote fixture.

  • Select backflow prevention devices by hazard level and state where each type is required versus prohibited.

  • Distinguish approved pipe materials and joint methods for water distribution and list the restriction on each method.

  • Produce a sizing worksheet showing demand, branch sizes, and a residual pressure check for a multi-story building.

Your checkpoint

A complete water supply sizing worksheet for a three-story, twelve-fixture building: total demand, each branch size, and a passing residual pressure check.

Week 5

Water Supply and Distribution & Storm Drainage and Special Plumbing Systems

  • Calculate roof drainage loads using rainfall intensity, including projected area of pitched roofs and vertical wall area contributions.

  • Size conductors, gutters, and storm drain piping, and determine when secondary or overflow drainage is required.

  • Size sumps, pumps, and ejectors for a given inflow condition.

  • Explain the interaction between the domestic supply and fire protection connections and the protection required at that connection.

Your checkpoint

A storm drainage calculation packet for one flat roof and one pitched roof, with rainfall intensity source cited and every sizing step shown.

Week 6

Storm Drainage and Special Plumbing Systems

  • Summarize the requirements for nonpotable, gray water, and harvested rainwater systems: cross-connection control, identification, and permitted uses.

  • Describe the temperature and pressure control requirements for combined domestic and fire systems and for solar thermal water heating.

  • Compare special-system requirements for health-care and food-service fixtures and list the protective devices each needs.

  • Draft inspection checkpoints an inspector would verify on-site for each special system covered this week.

Your checkpoint

A two-column comparison chart mapping each special system to its required protective devices, labeling, and inspection checkpoints.

Week 7

Administration, General Provisions, and Definitions

  • Define at least 60 code terms and produce a flashcard set with a plain-language gloss for each.

  • Trace the permit, inspection, and testing sequence, stating who acts at each stage and what constitutes approval.

  • Outline administrative provisions: permits, fees, inspections, board of appeals, variances, and violation handling, including the inspector's authority and limits.

  • Explain how the code, referenced standards, and manufacturer's instructions rank when they conflict, and state the correct course of action.

Your checkpoint

A one-page inspection sequence flow chart plus a 60-term glossary in flashcard form.

Week 8

Administration, General Provisions, and Definitions & Fixtures, Fixture Fittings, and Water Heaters & Water Supply and Distribution & Sanitary Drainage, Traps, and Vents & Storm Drainage and Special Plumbing Systems

  • Complete two full-length timed mock exams and log every missed item by domain and sub-topic.

  • Re-drill the three weakest sub-topics until each is solved without notes, twice in a row.

  • Rehearse code-navigation speed by locating twenty requirements in the code within fifteen minutes.

  • Audit all prior weekly deliverables and convert each remaining gap into a one-line rule on a final review sheet.

Your checkpoint

A scored 100-question timed mock with a domain-by-domain error log and a one-page last-look sheet.

Milestones

Week 2: Without notes, correctly answer 20 rapid-fire questions on trap seals, vent types, and vent distances at 90% or better.

Week 4: Score 80% or better on a closed-book 50-question exam covering Domains 2, 3, and 4, and size a water service from scratch in under 20 minutes.

Week 6: Complete the storm drainage and special systems packets with zero unresolved sizing steps, and pass a 25-question quiz on Domain 5 at 80% or better.

Week 8: Score 85% or better on both full-length timed mocks with no single domain below 75%.