Page |1
ICC COMMERCIAL PLUMBING INSPECTOR EXAM 2025/2026
NEWEST ACTUAL EXAM WITH COMPLETE QUESTIONS AND
VERIFIED ANSWERS |ALREADY GRADED A+|
The maximum allowable lead content of water supply pipe and
fittings suppling water for cooking or drinking is________percent.
-ANSWERS-0.025
Which of the following is required to be installed with a pressure
reducing valve? -ANSWERS-Strainer
Polypropylene (PP) pipe conforming to__________is approved
for water distribution piping. -ANSWERS-ASTM F 2389
Hot water distribution piping and tubing shall have a minimum
pressure rating of_________psi at________°F -ANSWERS-100,
180
Gate valves intended to supply drinking water shall comply
with____________. -ANSWERS-NSF 61
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Which of the following transition fitting materials is approved for a
connection between copper or copper alloy and ferrous tight
metal piping? -ANSWERS-Brass
The pressure rating of schedule 80 PVC or CPVC water pipe is
reduced by____________percent when threaded. -ANSWERS-50
Where street main pressures are known to be variable,
the_____________available pressure is used as the design
criteria for the water distribution system. -ANSWERS-Minimum
The minimum pressure rating for water service piping
is_____________PSI at 73.4° -ANSWERS-160
A parallel water distribution system has a supply branch from a
manifold to a shower that is 50 feet and develop the length. The
available pressure at the meter is 60 PSI. What is the minimum
required size of the fixtures supply to a shower? -ANSWERS-3/8
inch
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What is the maximum allowable lead composition in a solder
classified as lead free? -ANSWERS-0.2%
The maximum water consumption flow rate for non-metered
public lavatories is_________GPM at 60 PSI. -ANSWERS-0.5
The maximum water consumption flow rate for a blowout type
water closet is___________gallons per flush. -ANSWERS-3.5
Individual water supply system pumps installed in basements
shall be mounted not less than________inches above the
basement floor. -ANSWERS-18
Water service pipe shall be not less than________inches in
diameter. -ANSWERS-3/4
In general, water service pipe Shall be separated horizontally
from the building sewer by a minimum of____________feet of
undisturbed or compacted earth. -ANSWERS-5
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Water service pipe is permitted in the same trench as the building
sewer, provided the bottom of the water service pipe is not less
than________inches above the top of the highest point of the
sewer. -ANSWERS-12
In all cases, solvent cement joints of CPVC\AL\C PVC water
piping require a primer if the pipe size is greater
than________inches in diameter. -ANSWERS-2
For underground PVC water service piping, solvent cement joints
require____________primer. -ANSWERS-Purple
A flush valve urinal requires a minimum fixture supply pipe size
of______________inch. -ANSWERS-3/4
In one and two family residential occupancy's, a water supply to
a_________does not require a shut off valve. -ANSWERS-Bath
tub
ICC COMMERCIAL PLUMBING INSPECTOR EXAM 2025/2026
NEWEST ACTUAL EXAM WITH COMPLETE QUESTIONS AND
VERIFIED ANSWERS |ALREADY GRADED A+|
The maximum allowable lead content of water supply pipe and
fittings suppling water for cooking or drinking is________percent.
-ANSWERS-0.025
Which of the following is required to be installed with a pressure
reducing valve? -ANSWERS-Strainer
Polypropylene (PP) pipe conforming to__________is approved
for water distribution piping. -ANSWERS-ASTM F 2389
Hot water distribution piping and tubing shall have a minimum
pressure rating of_________psi at________°F -ANSWERS-100,
180
Gate valves intended to supply drinking water shall comply
with____________. -ANSWERS-NSF 61
, Page |2
Which of the following transition fitting materials is approved for a
connection between copper or copper alloy and ferrous tight
metal piping? -ANSWERS-Brass
The pressure rating of schedule 80 PVC or CPVC water pipe is
reduced by____________percent when threaded. -ANSWERS-50
Where street main pressures are known to be variable,
the_____________available pressure is used as the design
criteria for the water distribution system. -ANSWERS-Minimum
The minimum pressure rating for water service piping
is_____________PSI at 73.4° -ANSWERS-160
A parallel water distribution system has a supply branch from a
manifold to a shower that is 50 feet and develop the length. The
available pressure at the meter is 60 PSI. What is the minimum
required size of the fixtures supply to a shower? -ANSWERS-3/8
inch
, Page |3
What is the maximum allowable lead composition in a solder
classified as lead free? -ANSWERS-0.2%
The maximum water consumption flow rate for non-metered
public lavatories is_________GPM at 60 PSI. -ANSWERS-0.5
The maximum water consumption flow rate for a blowout type
water closet is___________gallons per flush. -ANSWERS-3.5
Individual water supply system pumps installed in basements
shall be mounted not less than________inches above the
basement floor. -ANSWERS-18
Water service pipe shall be not less than________inches in
diameter. -ANSWERS-3/4
In general, water service pipe Shall be separated horizontally
from the building sewer by a minimum of____________feet of
undisturbed or compacted earth. -ANSWERS-5
, Page |4
Water service pipe is permitted in the same trench as the building
sewer, provided the bottom of the water service pipe is not less
than________inches above the top of the highest point of the
sewer. -ANSWERS-12
In all cases, solvent cement joints of CPVC\AL\C PVC water
piping require a primer if the pipe size is greater
than________inches in diameter. -ANSWERS-2
For underground PVC water service piping, solvent cement joints
require____________primer. -ANSWERS-Purple
A flush valve urinal requires a minimum fixture supply pipe size
of______________inch. -ANSWERS-3/4
In one and two family residential occupancy's, a water supply to
a_________does not require a shut off valve. -ANSWERS-Bath
tub
