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ICC P3 Plumbing Plans Examiner Exam ACTUAL EXAM
COMPLETE QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR
ICC P3 Plumbing Plans Examiner Exam
SUMMARIZED EXAM TOPICS (Point Form – Accurate for ICC P3 Coverage Areas)
• Permits and Administration (permit requirements, plan review process, code official authority,
temporary permits, utility disconnection)
• Fixture Requirements (minimum fixtures by occupancy type, fixture calculations per occupant
load, fixture distribution, water closets, urinals, lavatories, drinking fountains)
• Water Heaters (installation access, pans and drains, T&P relief valves, insulation requirements,
sizing and capacity, temperature limiting devices)
• Water Supply Distribution (pipe sizing fixture unit method, material requirements, pressure
regulation, backflow prevention, air gaps, cross-connection control)
• Sanitary Drainage (drain pipe sizing, slope requirements, cleanout placement and spacing,
building drain and sewer, material standards)
• Vents (vent sizing, stack vents, vent stacks, circuit venting, wet venting, air admittance valves,
vent termination requirements)
• Traps, Interceptors, Separators (trap seal requirements, prohibited traps, grease interceptors,
oil separators, sediment traps)
• Storm Drainage (roof drains, gutter sizing, storm sewer connections, subsoil drains, rainwater
harvesting)
• Health Care Plumbing (hospital fixture requirements, special waste systems, medical gas piping,
vacuum systems)
• Pipe Support and Protection (support spacing, shield plates for pipes through studs, seismic
bracing, trenching requirements)
• Code Compliance and Plan Review (identifying code violations, plan markups, coordination with
other trades, accessibility requirements ICC A117.1)
• Fuel Gas Piping (IFGC integration, gas pipe sizing, appliance connections, venting for gas
appliances)
1. A plumbing plan shows a bathroom on the third floor with water closet, lavatory, and shower. The
horizontal branch drain is 3 inches in diameter and serves 8 total fixtures. According to the IPC, what
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type of venting is permitted for this configuration?
A) Individual vents only
B) Circuit venting with a relief vent at the downstream end
C) No venting required for branch drains under 4 inches
D) Wet venting only when fixtures are on the same floor level
Answer: B
Rationale: Circuit venting is permitted for up to 8 fixtures connected to a horizontal branch drain when
sized per IPC Table 909.1. A relief vent is required at the downstream end of the circuit vented branch.
2. A commercial kitchen plan includes a grease interceptor for three-compartment sink and three floor
drains in the cooking area. The total flow-through rating is calculated as 45 GPM. What grease retention
capacity in pounds must the interceptor provide per IPC Table 1003.3.5.1?
A) 45 pounds
B) 50 pounds
C) 75 pounds
D) 90 pounds
Answer: D
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*Rationale: IPC Table 1003.3.5.1 shows that grease retention capacity in pounds is twice the total flow-
through rating in GPM. 45 GPM × 2 = 90 pounds retention capacity.*
3. A water heater is being installed in an attic with a passageway measuring 20 feet from the access
opening to the unit. The passageway height is 6 feet 6 inches. Does this meet IPC requirements for
access?
A) Yes, passageway height of 6 ft 6 in exceeds minimum 6 ft requirement
B) No, passageway length cannot exceed 20 feet
C) No, passageway must be at least 30 inches high and 22 inches wide
D) No, passageway height must be at least 7 feet for lengths over 15 feet
Answer: A
Rationale: IPC 502.3 requires the passageway to not exceed 20 feet in length when measured along the
centerline, and the clear opening must be at least 30 inches high and 22 inches wide. 6′6″ height is
acceptable.
4. During plan review, you notice a 4-inch by 3-inch closet bend specified for a water closet connection
on the second floor. Is this configuration acceptable under the IPC?
A) No, closet bends must maintain full 4-inch diameter throughout
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B) Yes, a 4-inch by 3-inch closet bend is permitted
C) No, reductions are only allowed for vent piping
D) Yes, but only for floor-mounted water closets
Answer: B
*Rationale: IPC 425.4 specifically permits a 4-inch by 3-inch closet bend. This is a standard allowance for
water closet connections.*
5. A building permit has been issued for plumbing work. The permit shall expire if the work is not
commenced within how many days from the date of issuance?
A) 90 days
B) 120 days
C) 180 days
D) 365 days
Answer: C
Rationale: Plumbing permits for work not commenced within 180 days become invalid. Extensions may
be granted by the code official for good cause.
ICC P3 Plumbing Plans Examiner Exam ACTUAL EXAM
COMPLETE QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR
ICC P3 Plumbing Plans Examiner Exam
SUMMARIZED EXAM TOPICS (Point Form – Accurate for ICC P3 Coverage Areas)
• Permits and Administration (permit requirements, plan review process, code official authority,
temporary permits, utility disconnection)
• Fixture Requirements (minimum fixtures by occupancy type, fixture calculations per occupant
load, fixture distribution, water closets, urinals, lavatories, drinking fountains)
• Water Heaters (installation access, pans and drains, T&P relief valves, insulation requirements,
sizing and capacity, temperature limiting devices)
• Water Supply Distribution (pipe sizing fixture unit method, material requirements, pressure
regulation, backflow prevention, air gaps, cross-connection control)
• Sanitary Drainage (drain pipe sizing, slope requirements, cleanout placement and spacing,
building drain and sewer, material standards)
• Vents (vent sizing, stack vents, vent stacks, circuit venting, wet venting, air admittance valves,
vent termination requirements)
• Traps, Interceptors, Separators (trap seal requirements, prohibited traps, grease interceptors,
oil separators, sediment traps)
• Storm Drainage (roof drains, gutter sizing, storm sewer connections, subsoil drains, rainwater
harvesting)
• Health Care Plumbing (hospital fixture requirements, special waste systems, medical gas piping,
vacuum systems)
• Pipe Support and Protection (support spacing, shield plates for pipes through studs, seismic
bracing, trenching requirements)
• Code Compliance and Plan Review (identifying code violations, plan markups, coordination with
other trades, accessibility requirements ICC A117.1)
• Fuel Gas Piping (IFGC integration, gas pipe sizing, appliance connections, venting for gas
appliances)
1. A plumbing plan shows a bathroom on the third floor with water closet, lavatory, and shower. The
horizontal branch drain is 3 inches in diameter and serves 8 total fixtures. According to the IPC, what
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type of venting is permitted for this configuration?
A) Individual vents only
B) Circuit venting with a relief vent at the downstream end
C) No venting required for branch drains under 4 inches
D) Wet venting only when fixtures are on the same floor level
Answer: B
Rationale: Circuit venting is permitted for up to 8 fixtures connected to a horizontal branch drain when
sized per IPC Table 909.1. A relief vent is required at the downstream end of the circuit vented branch.
2. A commercial kitchen plan includes a grease interceptor for three-compartment sink and three floor
drains in the cooking area. The total flow-through rating is calculated as 45 GPM. What grease retention
capacity in pounds must the interceptor provide per IPC Table 1003.3.5.1?
A) 45 pounds
B) 50 pounds
C) 75 pounds
D) 90 pounds
Answer: D
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*Rationale: IPC Table 1003.3.5.1 shows that grease retention capacity in pounds is twice the total flow-
through rating in GPM. 45 GPM × 2 = 90 pounds retention capacity.*
3. A water heater is being installed in an attic with a passageway measuring 20 feet from the access
opening to the unit. The passageway height is 6 feet 6 inches. Does this meet IPC requirements for
access?
A) Yes, passageway height of 6 ft 6 in exceeds minimum 6 ft requirement
B) No, passageway length cannot exceed 20 feet
C) No, passageway must be at least 30 inches high and 22 inches wide
D) No, passageway height must be at least 7 feet for lengths over 15 feet
Answer: A
Rationale: IPC 502.3 requires the passageway to not exceed 20 feet in length when measured along the
centerline, and the clear opening must be at least 30 inches high and 22 inches wide. 6′6″ height is
acceptable.
4. During plan review, you notice a 4-inch by 3-inch closet bend specified for a water closet connection
on the second floor. Is this configuration acceptable under the IPC?
A) No, closet bends must maintain full 4-inch diameter throughout
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B) Yes, a 4-inch by 3-inch closet bend is permitted
C) No, reductions are only allowed for vent piping
D) Yes, but only for floor-mounted water closets
Answer: B
*Rationale: IPC 425.4 specifically permits a 4-inch by 3-inch closet bend. This is a standard allowance for
water closet connections.*
5. A building permit has been issued for plumbing work. The permit shall expire if the work is not
commenced within how many days from the date of issuance?
A) 90 days
B) 120 days
C) 180 days
D) 365 days
Answer: C
Rationale: Plumbing permits for work not commenced within 180 days become invalid. Extensions may
be granted by the code official for good cause.
