International Plumbing Code 2026

Every plumbing job ends at the same place: the inspection where the system you installed either passes or gets torn back open.
Miss a venting rule, mis-size a drain, or set the wrong backflow device, and the rejection costs you the schedule, the callback, and sometimes the bid.
This book puts the working logic of the International Plumbing Code at your fingertips — so you find the governing provision fast, apply it right the first time, and walk into any inspection or certification exam ready.
What you will take from this book:
• Section-Trace navigation — locate the governing IPC provision under the two-minute-per-question clock of the P1 and P2 exams, then trace it straight to the field consequence
• Drain sizing that holds — convert drainage fixture units to pipe size without tripping the water-closet minimum or the wrong sizing table
• Venting decoded — tell wet, circuit, island, and waste-stack venting apart and build each as the defined configuration the IPC actually requires
• Backflow matched to the hazard — select air gaps, double-check, and reduced pressure principle assemblies by degree of hazard and direction of flow
• Water supply you can defend — size distribution by the water supply fixture unit method and control thermal expansion behind a pressure-reducing valve
• Storm sizing tied to the rain — convert roof area and local rainfall rate into leader and storm-drain sizes that hold in the design storm
• Inspection-ready testing — run the water, air, and 2024-cycle vacuum tests so concealed work passes the first time
This book serves journeyman and master plumbers, plumbing apprentices, ICC certification candidates, plumbing inspectors, plan reviewers, and contractors working under the IPC.