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🔹Scope – Residential Plumbing Inspector
A Residential Plumbing Inspector is responsible for verifying that all components of the plumbing system are installed in accordance with code. This includes piping systems, joints, connections, fixtures, appliances, flow rates, pressures, temperature controls, potable and nonpotable water protection, sanitary drainage, venting, traps, and storm drainage systems. Inspectors must also evaluate water heaters and verify fuel gas piping, combustion air, and venting.
🔹 Exam Information
About the ICC Residential Plumbing Inspector Exam
- Based on: 2024 International Residential Code (IRC)
- Format: Open-book, multiple choice
- Time: 2 hours (60 questions)
- Passing Score: 75%
🔹Exam Content Breakdown – 2024 Residential Plumbing Inspector🔹
| Exam Section | Relevant IRC Chapters / Focus |
|---|---|
| ✅ General Requirements (13%) | Ch. 25 – Plumbing Administration (permits, inspections, testing responsibilities) Ch. 26 – General Plumbing Requirements (piping protection, materials, identification, installation safety) |
| ✅ Fixtures (8%) | Ch. 27 – Plumbing Fixtures (minimum fixtures, approvals, installation, sealing, faucets, fittings, flow rates & temperatures) |
| ✅ Water Heaters (12%) | Ch. 28 – Water Heaters (design, safety devices, T&P valves, pans, seismic bracing) Ch. 24 – Fuel Gas (gas piping sizing, combustion air, venting for water heaters) |
| ✅ Water Supply & Distribution (22%) | Ch. 29 – Water Supply & Distribution (potable & nonpotable systems, contamination protection, service/distribution piping, sizing, pressure, water treatment) |
| ✅ Sanitary Drainage (23%) | Ch. 30 – Sanitary Drainage (drains, sewers, stacks, sumps, ejectors, cleanouts) Ch. 32 – Traps (types, sizing, installation, prohibited traps) Ch. 33 – Storm Drainage (where applicable for drainage system interfaces) |
| ✅ Vents (22%) | Ch. 31 – Vents (materials, sizing, methods, pressure balancing, trap seal protection) |
🔹 Study Tips
- Focus extra time on the highest-weighted sections — they carry the most points on the exam.
- Mark your codebook with tabs for fast navigation.
- Practice under timed conditions to simulate real test pressure.
- Use flashcards for quick lookup and instant feedback when reviewing material.
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