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Testbank: ICC P3 Plumbing Plans Examiner Exam 2026 – Practice Q&A with Detailed Solutions

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Prepare for the ICC P3 Plumbing Plans Examiner Exam with this comprehensive collection of practice questions and detailed solutions. Updated for 2026 and aligned with the 2021 International Plumbing Code (IPC) and International Fuel Gas Code (IFGC) , this resource covers the content areas of the 60-question, open-book exam .

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ICC P3 Plumbing Plans
Examiner Exam
QUESTIONS AND
DETAILED SOLUTIONS
JUST RELEASED.pdf
Air gap + 2x pipe diameter - answer-

No water pipe shall be in the same trench with clay pipe, brace under slab or no joints,
testing for the same pressure of the supply for 15 minutes except for plastic. - answer-

Expansion tanks are required - answer- when having a closed system

Soldered joints ---- solder is done when - answer- the fitting is cleaned

Multi-dwelling units --- one shut-off valve - answer- per unit

Threaded joints shall be sealed with sealant tape or compound - answer- applied on
male threads only

Cleanout clearance 2" and smaller is ____ ---- 2 ½" and larger is ____ - answer- 18" ,
24"

Slope of horizontal drainage pipe - answer- ¼" (2%) per ft 3" and smaller, ⅛" per foot for
4" and larger

backflow is needed if sewer is lower than upstream manhole - answer- Backflow
protection

Laundry stand pipes---between ______ above the trap and the trap starts between
______ above the floor - answer- 18"-30", 6"-18"

Drinking fountains and drinking water shall comply to _______ standards - answer-
NSF61

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