Under the IRC, who has the authority to grant modifications from strict compliance with the plumbing provisions?
General Requirements
Question · Easy
ICC P1 Residential Plumbing Inspector Exam Guide 2026
Prepare for the 2026 ICC P1 Residential Plumbing Inspector exam with open-book lookup strategy, IRC plumbing topics, scaled scoring, timing, and free practice.
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Why must permit status be checked before a plumbing inspection?
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Which of the following plumbing work typically requires a permit under the IRC?
Chapter 1: General Requirements & Administration
1.1 ICC P1 Exam Orientation & Navigation Strategy
Study guide
Cheat sheet
What is the minimum required test pressure for a DWV system using a water test per the IRC?
Question · Medium
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When does concealed piping need shield-plate protection?
Per the IRC, what is the minimum required test pressure for testing a water supply system with air?
Plastic piping penetrating a fire-resistance-rated wall assembly must be protected by what means per the IRC?
What determines whether piping needs freeze protection?
What is the maximum allowable notch depth in a 2x6 load-bearing stud for plumbing piping per the IRC?
Question · Hard
1.2 Code Administration & Permits
Plastic DWV piping passing through a concrete or masonry wall must be protected by which of the following?
Why must a pipe sleeve through a foundation allow movement?
When a plumbing pipe is installed less than how many inches from the edge of a wood framing member, nail plates or steel shields must be installed?
Water piping installed in exterior walls in freezing climates must be protected from freezing by which of the following?
What is the purpose of required pipe supports?
Which of the following is NOT one of the required tests for a residential plumbing system per the IRC?
1.3 Piping Protection, Burial & Structural Safety
The shower liner test requires filling the liner with water to what minimum depth?
Why inspect framing after plumbing rough-in?
An inspector discovers that the contractor drilled a 2-inch hole through the center of a 2x10 floor joist for a waste pipe. Is this acceptable per the IRC?
Per the IRC, a plumbing system shall be designed and installed by methods that prevent which of the following?
Why must plumbing tests occur before concealment?
Which of the following fixtures is required in a residential dwelling per the IRC?
Fixtures
1.4 Plumbing System Testing Requirements
What is the minimum clearance in front of a water closet per the IRC?
How does an inspector determine the minimum required dwelling fixtures?
The minimum distance from the centerline of a water closet to any sidewall or obstruction per the IRC is:
The maximum water consumption for a residential water closet per the IRC is:
What evidence shows a plumbing fixture is approved?
What is the maximum flow rate for a residential showerhead per the IRC at 80 psi?
Chapter 2: Plumbing Fixtures
2.1 Fixture Materials, Approvals & Design Standards
Per the IRC, a shower compartment must have a minimum interior finished area of at least:
What clearances govern a residential water closet in the 2024 IRC?
Shower valves for bathtubs and showers must be balanced-pressure, thermostatic, or combination control valves with a maximum hot water temperature setting of:
Which fixture material standard applies to vitreous china water closets per the IRC?
Why can a water-heater thermostat be insufficient for fixture temperature control?
A kitchen sink strainer must have an opening not less than:
2.2 Fixture Installation & Spacing Clearances
Per the IRC, water closet seats must be:
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