PLUMBING IP CODE 2026/2027 | PLUMBING CODE STUDY GUIDE,
PRACTICE QUESTIONS, ANSWERS & EXAM REVIEW
A single shower drain shall not serve more than - correct answer ✔✔6 shower heads
The horizontal distance between 2 adjacent shower heads shall be at least - correct answer ✔✔750mm
Every trap seal shall have a trap seal depth of at least - correct answer ✔✔38mm
Which trap is not allowed in a drainage system - correct answer ✔✔Bell trap
A T fitting may be used in a plumbing system to connect - correct answer ✔✔A vertical dry vent to a
horizontal dry vent
When installing two urinals back to back using a double sanitary tee, the location of the cleanout shall be
- correct answer ✔✔Above the double sanitary tee
Type M hard temper copper pipe may be used for - correct answer ✔✔Above ground water distribution
Underground sanitary building drains may be piped with - correct answer ✔✔Concrete reinforced drain
pipe, lead waste pipe , vitrified clay pipe
A sanitary building sewer may be constructed of - correct answer ✔✔Pvc DWV,PVC sewer pipe ,ABS
DWV
What piping material is not rated for hot water distribution - correct answer ✔✔PVC
Which copper pipe is rated for underground water distribution - correct answer ✔✔Type K soft
Every roof drain shall be provided with - correct answer ✔✔A mean to provide expansion
An air break shall be at least - correct answer ✔✔The same size as the drainage pipe
Normally horizontal ABS plastic piping shall be supported at intervals not exceeding - correct answer
✔✔1.2m
Normally horizontal hard copper tubing 3/4 inch in diameter shall be supported at intervals not
exceeding - correct answer ✔✔2.5m
After a section of the drainage system has been roughed in which of the following tests may be required
- correct answer ✔✔Ball test, air test, water test
An external rainwater leader requires which test - correct answer ✔✔No test is required
,The test required for potable water system is - correct answer ✔✔A water test that is at least equal to
the maximum pressure to which it may be subject to
What can be connect directly to a sanitary drainage system - correct answer ✔✔Bidet
Which fixture must be indirectly connected to a drainage system - correct answer ✔✔Sterilizer
Correct configuration for a sump pump piping - correct answer ✔✔Union, check valve, shut off
The maximum temp of sewage discharging into a drainage system shall not exceed - correct answer
✔✔75 degrees Celsius
A grease interceptor shall be installed to received the discharge of - correct answer ✔✔Three
compartment commercial pot sink
On trap may serve - correct answer ✔✔Two basins in same room, two single compartment bar sinks in
same room , one two or three compartment pot sinks
A floor drain connected to a storm building drain shall - correct answer ✔✔Have it's seal maintained
The maximum change in direction between cleanouts in a fixture drain serving a kitchen sink is - correct
answer ✔✔90 degrees
The maximum distance between directional clean-outs on a 4 inch sanitary building drain (one-way
rodding) is - correct answer ✔✔15m
Which of the following drainage pipes requires slope of 1:50 - correct answer ✔✔3 inch trap arm
A shall washout type urinal may be served by an - correct answer ✔✔2 inch p trap
A 3 inch soil or waste stack can serve a maximum - correct answer ✔✔6 water closets
A three compartment kitchen sink shall be served by a minimum - correct answer ✔✔2 inch p trap
A pump has a continuous flow of 6 litres per second. To convert this to fixtures units we use the
multiplier - correct answer ✔✔31.7
An air conditioner has a drain connected to the storm drainage system. Which of the following numbers
is used to convert this flow rate to hydraulic load of a storm building sewer - correct answer ✔✔900
What is the maximum horizontal spacing of supports required for pex plastic piping - correct answer
✔✔0.8
Cast iron soil pipe shall be adequately supported to maximum of blank metres horizontally - correct
answer ✔✔3 metres
Soldered joints shall be made in accordance with what standard - correct answer ✔✔ASTM B828
,Fixed location shower heads are required to be supplied by a valve that is - correct answer ✔✔Either
individual pressure- balanced or thermostatic- mixing would be acceptable
If a 4 inch fixture discharged to a drainage system and required an indirect connection. What is the
minimum vertical distance of the air break - correct answer ✔✔4 inches or 100 mm
Where a laundry standpipe is to be installed. The stand pipe shall terminate above the flood level rim of
the clothes washer and shall be a minimum of blank mm long when measures from the trap weir -
correct answer ✔✔600mm
A vent is required for a floor drain if the trap is 3 inches . The length of the trap arm is greater than 18
inches and the fall of the fixture drain is not more than the size of the pipe - correct answer ✔✔False
Except for water closets and emergency floor drains . What is the maximum trap arm or fixture drain size
allowed to connect to a wet vent - correct answer ✔✔2 inch
What is the maximum number of fixture unit that may be wet vented if the wet vent is serving water
closets - correct answer ✔✔23 fixture unit
What is the minimum size wet vent allowed if serving water closets - correct answer ✔✔2 inch
What is the minimum size wet vent allowed if not serving water closets - correct answer ✔✔1 1/2 inch
How many water closets may be wet vented and where and how must they be connected to the wet
vent - correct answer ✔✔Maximum of two and they must be symmetrically connected downstream of
any other fixtures
What is the maximum length for nominally horizontal offsets in wet vented systems for pipe size over 2
inch - correct answer ✔✔2.5m
A trap that serves a sub-soil pipe must be vent - correct answer ✔✔False
What is the minimum size of soil or waste pipe downstream of circuit vent connection for traps 2 inch or
larger? - correct answer ✔✔3 inches
The branch size for a group of 4 . Wall outlet urinal (non-washout). That are circuit vented is 2 - correct
answer ✔✔False
What is the maximum horizontal change in direction allowed in a circuit vented branch before an
additional circuit vent is required - correct answer ✔✔45 degrees
What is the maximum number of fixtures or fixture units allowed In a circuit vented branch before an
additional circuit vent is required - correct answer ✔✔8 fixtures
State the hydraulic load for 3 inch emergency floor drains - correct answer ✔✔0
Separately vented fixtures that drain into a circuit vented branch need to be counted counted to size the
actual circuit vent - correct answer ✔✔True
, When is a vent stack required - correct answer ✔✔When more than four floors contain fixtures
Where must the vent stack connect to the soil or waste stack - correct answer ✔✔At or below the lowest
soil or waste stack connection downstream of any fixtures on the vertical portion of the stack
When is a yoke vent for a soil vent or waste stack needed - correct answer ✔✔Where the stack receives
discharge from more than 11 stories
What is the horizontal offset in a soil or waste stack before it must be vented - correct answer ✔✔1.5m
Which figure In the notes gives a visual explanation of a soil or waste stacks offset requiring venting -
correct answer ✔✔A-2.5.4.4
How many vents are required for an oil inceptor - correct answer ✔✔2
The vents for oil interceptors may be connected together - correct answer ✔✔False
How shall vents for corrosive drain piping and dilution tanks be installed - correct answer ✔✔They must
terminate independently to outdoors
What is the minimum developed length of a trap arm - correct answer ✔✔Twice the diameter of the
fixture drain
A 4 inch floor drain need not be protected by a vent of the fixture drain is at least blank mm in length -
correct answer ✔✔450mm
The drafting line that indicates alternating positions,movable parts or future locations of equipment or
piping is a - correct answer ✔✔Phantom line
At what temperature is water most dense? - correct answer ✔✔4°C
A good flame for oxy-acetylene brazing would be - correct answer ✔✔Neutral
What type of pipe support would be used on a 4 inch riser passing through 6 stories of a building -
correct answer ✔✔Riser clamp
If the water service is installed in the same trench as the sewer. It should be installed - correct answer
✔✔Above and to one side of the sewer
Under similar thermal conditions. The expansion/contraction of copper pipe - correct answer ✔✔Is
more than that of Steel pipe
What is the maximum spacing supporting a 2 inch vertical copper water line - correct answer ✔✔7.5m
What connection method would be used to join underground high density polyethylene pipe - correct
answer ✔✔Heat fusion
PRACTICE QUESTIONS, ANSWERS & EXAM REVIEW
A single shower drain shall not serve more than - correct answer ✔✔6 shower heads
The horizontal distance between 2 adjacent shower heads shall be at least - correct answer ✔✔750mm
Every trap seal shall have a trap seal depth of at least - correct answer ✔✔38mm
Which trap is not allowed in a drainage system - correct answer ✔✔Bell trap
A T fitting may be used in a plumbing system to connect - correct answer ✔✔A vertical dry vent to a
horizontal dry vent
When installing two urinals back to back using a double sanitary tee, the location of the cleanout shall be
- correct answer ✔✔Above the double sanitary tee
Type M hard temper copper pipe may be used for - correct answer ✔✔Above ground water distribution
Underground sanitary building drains may be piped with - correct answer ✔✔Concrete reinforced drain
pipe, lead waste pipe , vitrified clay pipe
A sanitary building sewer may be constructed of - correct answer ✔✔Pvc DWV,PVC sewer pipe ,ABS
DWV
What piping material is not rated for hot water distribution - correct answer ✔✔PVC
Which copper pipe is rated for underground water distribution - correct answer ✔✔Type K soft
Every roof drain shall be provided with - correct answer ✔✔A mean to provide expansion
An air break shall be at least - correct answer ✔✔The same size as the drainage pipe
Normally horizontal ABS plastic piping shall be supported at intervals not exceeding - correct answer
✔✔1.2m
Normally horizontal hard copper tubing 3/4 inch in diameter shall be supported at intervals not
exceeding - correct answer ✔✔2.5m
After a section of the drainage system has been roughed in which of the following tests may be required
- correct answer ✔✔Ball test, air test, water test
An external rainwater leader requires which test - correct answer ✔✔No test is required
,The test required for potable water system is - correct answer ✔✔A water test that is at least equal to
the maximum pressure to which it may be subject to
What can be connect directly to a sanitary drainage system - correct answer ✔✔Bidet
Which fixture must be indirectly connected to a drainage system - correct answer ✔✔Sterilizer
Correct configuration for a sump pump piping - correct answer ✔✔Union, check valve, shut off
The maximum temp of sewage discharging into a drainage system shall not exceed - correct answer
✔✔75 degrees Celsius
A grease interceptor shall be installed to received the discharge of - correct answer ✔✔Three
compartment commercial pot sink
On trap may serve - correct answer ✔✔Two basins in same room, two single compartment bar sinks in
same room , one two or three compartment pot sinks
A floor drain connected to a storm building drain shall - correct answer ✔✔Have it's seal maintained
The maximum change in direction between cleanouts in a fixture drain serving a kitchen sink is - correct
answer ✔✔90 degrees
The maximum distance between directional clean-outs on a 4 inch sanitary building drain (one-way
rodding) is - correct answer ✔✔15m
Which of the following drainage pipes requires slope of 1:50 - correct answer ✔✔3 inch trap arm
A shall washout type urinal may be served by an - correct answer ✔✔2 inch p trap
A 3 inch soil or waste stack can serve a maximum - correct answer ✔✔6 water closets
A three compartment kitchen sink shall be served by a minimum - correct answer ✔✔2 inch p trap
A pump has a continuous flow of 6 litres per second. To convert this to fixtures units we use the
multiplier - correct answer ✔✔31.7
An air conditioner has a drain connected to the storm drainage system. Which of the following numbers
is used to convert this flow rate to hydraulic load of a storm building sewer - correct answer ✔✔900
What is the maximum horizontal spacing of supports required for pex plastic piping - correct answer
✔✔0.8
Cast iron soil pipe shall be adequately supported to maximum of blank metres horizontally - correct
answer ✔✔3 metres
Soldered joints shall be made in accordance with what standard - correct answer ✔✔ASTM B828
,Fixed location shower heads are required to be supplied by a valve that is - correct answer ✔✔Either
individual pressure- balanced or thermostatic- mixing would be acceptable
If a 4 inch fixture discharged to a drainage system and required an indirect connection. What is the
minimum vertical distance of the air break - correct answer ✔✔4 inches or 100 mm
Where a laundry standpipe is to be installed. The stand pipe shall terminate above the flood level rim of
the clothes washer and shall be a minimum of blank mm long when measures from the trap weir -
correct answer ✔✔600mm
A vent is required for a floor drain if the trap is 3 inches . The length of the trap arm is greater than 18
inches and the fall of the fixture drain is not more than the size of the pipe - correct answer ✔✔False
Except for water closets and emergency floor drains . What is the maximum trap arm or fixture drain size
allowed to connect to a wet vent - correct answer ✔✔2 inch
What is the maximum number of fixture unit that may be wet vented if the wet vent is serving water
closets - correct answer ✔✔23 fixture unit
What is the minimum size wet vent allowed if serving water closets - correct answer ✔✔2 inch
What is the minimum size wet vent allowed if not serving water closets - correct answer ✔✔1 1/2 inch
How many water closets may be wet vented and where and how must they be connected to the wet
vent - correct answer ✔✔Maximum of two and they must be symmetrically connected downstream of
any other fixtures
What is the maximum length for nominally horizontal offsets in wet vented systems for pipe size over 2
inch - correct answer ✔✔2.5m
A trap that serves a sub-soil pipe must be vent - correct answer ✔✔False
What is the minimum size of soil or waste pipe downstream of circuit vent connection for traps 2 inch or
larger? - correct answer ✔✔3 inches
The branch size for a group of 4 . Wall outlet urinal (non-washout). That are circuit vented is 2 - correct
answer ✔✔False
What is the maximum horizontal change in direction allowed in a circuit vented branch before an
additional circuit vent is required - correct answer ✔✔45 degrees
What is the maximum number of fixtures or fixture units allowed In a circuit vented branch before an
additional circuit vent is required - correct answer ✔✔8 fixtures
State the hydraulic load for 3 inch emergency floor drains - correct answer ✔✔0
Separately vented fixtures that drain into a circuit vented branch need to be counted counted to size the
actual circuit vent - correct answer ✔✔True
, When is a vent stack required - correct answer ✔✔When more than four floors contain fixtures
Where must the vent stack connect to the soil or waste stack - correct answer ✔✔At or below the lowest
soil or waste stack connection downstream of any fixtures on the vertical portion of the stack
When is a yoke vent for a soil vent or waste stack needed - correct answer ✔✔Where the stack receives
discharge from more than 11 stories
What is the horizontal offset in a soil or waste stack before it must be vented - correct answer ✔✔1.5m
Which figure In the notes gives a visual explanation of a soil or waste stacks offset requiring venting -
correct answer ✔✔A-2.5.4.4
How many vents are required for an oil inceptor - correct answer ✔✔2
The vents for oil interceptors may be connected together - correct answer ✔✔False
How shall vents for corrosive drain piping and dilution tanks be installed - correct answer ✔✔They must
terminate independently to outdoors
What is the minimum developed length of a trap arm - correct answer ✔✔Twice the diameter of the
fixture drain
A 4 inch floor drain need not be protected by a vent of the fixture drain is at least blank mm in length -
correct answer ✔✔450mm
The drafting line that indicates alternating positions,movable parts or future locations of equipment or
piping is a - correct answer ✔✔Phantom line
At what temperature is water most dense? - correct answer ✔✔4°C
A good flame for oxy-acetylene brazing would be - correct answer ✔✔Neutral
What type of pipe support would be used on a 4 inch riser passing through 6 stories of a building -
correct answer ✔✔Riser clamp
If the water service is installed in the same trench as the sewer. It should be installed - correct answer
✔✔Above and to one side of the sewer
Under similar thermal conditions. The expansion/contraction of copper pipe - correct answer ✔✔Is
more than that of Steel pipe
What is the maximum spacing supporting a 2 inch vertical copper water line - correct answer ✔✔7.5m
What connection method would be used to join underground high density polyethylene pipe - correct
answer ✔✔Heat fusion
