ICC P2 Commercial Plumbing Inspector

HoldPoint study map

Course outline

Unit and lesson titles below are HoldPoint original material. They are not an official exam bulletin.

1. Administration, fixtures and water distribution

   Classify the system. Then inspect the fixture and the water that serves it.

   • Adopted IPC, amendments and what you enforce
   • Fixture count, occupancy and the plan check you still verify in the field
   • Fixture installation, clearances and listing
   • Water distribution: materials, sizing path and isolation
   • Backflow as a device-identity and location problem
   • Water heaters: T&P, pan, drain and combustion interface
   • Nonpotable systems that were tied in anyway
   • Practice: eight water-side first moves
   • Unit review: Administration, fixtures and water distribution

2. Sanitary drainage

   Drainage is slope, size, fittings and the load — in that classification order.

   • Drainage fittings: the change of direction you can still see
   • Slope and the section of pipe that went flat
   • Sizing as a lookup after you have classified the load
   • Sumps, ejectors and the public sewer interface
   • Indirect waste and the air gap that was closed
   • Grease interceptors as an installation, not a menu item
   • Prohibited fittings and the “it always drains” argument
   • Practice: six drainage installations
   • Unit review: Sanitary drainage

3. Vents, cleanouts and storm drainage

   Venting is not drainage. Storm is not sanitary. Cleanouts are how anyone proves either later.

   • Vent types as a classification
   • Circuit, island and combination waste-and-vent as method identity
   • Termination, frost closure and the roof that was already done
   • Cleanouts: location, size and access
   • Storm drainage: roofs, decks and area drains
   • Combined sanitary and storm — only if the adopted code allows it
   • Secondary roof drains as a building-code interface
   • Practice: classify ten vent or storm conditions
   • Unit review: Vents, cleanouts and storm drainage

4. Materials, joints, testing and medical/special systems

   The joint has to match the material. The test has to match the system.

   • Material identity in the trench and in the wall
   • Joints and connections: method identity
   • Support, protection and underground installation
   • DWV testing versus water-distribution testing
   • Failed tests: what you retest
   • Medical gas as a different inspection
   • Chemical waste and the listing that has to exist
   • Practice: six material-and-test pairs
   • Unit review: Materials, joints, testing and medical/special systems

5. Plan-to-field sequence

   Groundwork, rough, top-out and final. Concealment is the enemy of a plumbing inspection.

   • Groundwork: what has to be seen in the trench
   • Rough-in before cover, including in walls and ceilings
   • Top-out and the roof terminations
   • Final: fixtures, water, heat and the devices that were stored in a box
   • Tenant improvements on occupied systems
   • Notices that name the system, not the vibe
   • Coordination with mechanical, electrical and the building inspector
   • Practice: sequence a restaurant plumbing inspection
   • Unit review: Plan-to-field sequence

6. Mixed review and exam navigation

   Stems that mix venting with drainage sizing, and the unused fixture-unit number.

   • How a P2 stem hides the system classification
   • Fixture items versus drainage items
   • The unused fixture-unit number
   • Mixed set: backflow, vent termination and cleanout
   • Timed retrieval across the IPC
   • What you do not design
   • Final self-assessment
   • Handoff to the C5 combination sequence
   • Unit review: Mixed review and exam navigation

Fit check

Who this roadmap is for

Code officials and inspectors building a study plan for the P2 scope.

Always confirm the current ICC eligibility rules, exam outline, references, fees, and scheduling policies before purchasing materials or setting an exam date.

Study sequence

A controlled preparation roadmap

1. 01

   Verify the current program

   Start with the official source links below. Record the current outline, permitted references, eligibility rules, and any application steps that apply to your route.

2. 02

   Map the reference set

   Turn each published domain into a retrieval map. Practice where to look before trying to memorize isolated answers.

3. 03

   Build the P2 core

   Study fixtures and water-distribution systems alongside sanitary drainage, venting, and cleanouts, then connect both to field decisions and documentation.

4. 04

   Practice under controlled timing

   Use short lookup drills first, then mixed review. Track missed concepts and slow retrievals separately so each can be corrected.

5. 05

   Recheck before exam day

   Return to the credentialing body for last-minute policy or reference changes. Do not rely on a third-party summary for current exam administration.

Primary sources

Verify current program facts

Exam outlines, editions, eligibility, fees, and administration policies can change. These credentialing-body pages are the authority; HoldPoint is an independent preparation provider.

• ICC certification and testingInternational Code Council

Common questions

Before you build a study plan