Traps, Interceptors, Separators & Vents Flashcards
Understand the function and installation of traps and interceptors, along with venting systems and configurations in plumbing installations.
Fill in the blank:
The vertical distance from the fixture outlet to the trap weir shall not exceed ______ inches.
24 inches
Fill in the blank:
A combination plumbing fixture is permitted to be installed on one trap provided that one compartment is not more than ______ inches deeper than the other compartment.
6
Where is a slip joint connection of a trap not permitted?
trap offset
Fill in the blank:
Each fixture trap shall have a trap seal not more than ______ inches deep.
4
True or False:
A trap shall be larger than the drainage pipe into which the trap discharges.
False
True or False:
Acid resistant traps shall be embedded in concrete.
True
Which location does not require a grease interceptor or automatic grease removal device?
residential kitchen
What is the grease retention capacity for an interceptor with a flow-through rate of 10 GPM?
20 pounds
Fill in the blank:
______ shall be provided for inspection and maintenance of automatic grease removal devices.
Ready access
Fill in the blank:
A wire basket on the discharge side of a clothes washer shall prevent the passage of solids ______ inch(es) or larger from being discharged into the public sewer.
1/2
True or False:
The plumbing vent system may be used for purposes other than venting of the plumbing when approved by the code official.
False
Fill in the blank:
Where a rooftop is used for restaurant dining, open vent pipes shall terminate not less than ______ feet above the roof.
7
Fill in the blank:
Any increase in size for vent terminations shall be created not less than ______ inside the thermal envelope.
12 inches
Fill in the blank:
A vent stack is required when there are more than ______ branch intervals in a building.
five
Fill in the blank:
If a vent extends more than ______ feet in developed length, then the vent shall be increased by one nominal pipe size for the entire length.
40
What is the vent pipe size for a drainage system serving a 4” stack carrying 300 DFU with a developed length of 75 feet?
3 inches
True or False:
The developed length may be measured from the farthest point of vent connection to the drainage system to the vent termination outside the building.
True
Fill in the blank:
Relief vents shall be provided for stacks having ______ or more branch intervals
10
What is the maximum distance for a trap arm for a 1 1/4” trap with 1/4” per foot grade?
5 feet
What is the maximum distance for a trap arm for a 3” trap with 1/8” per foot grade?
12 feet
True or False:
Common vented trap fixtures shall be located on the same floor level.
True
True or False:
Fixtures being vented by a horizontal wet vent must be on the same floor level.
True
True or False:
A waste stack vent system is permitted to have 45-degree offsets within the stack.
False
What is the maximum number of fixtures that can be served by a circuit vent?
8
True or False:
When a circuit vented drain connects to a stack receiving waste from above, a relief vent is required.
True
Which of the following fixtures is permitted to be served by an island fixture vent?
a. water closet
b. urinal
c. sink
d. service sink
c. sink
What is the maximum distance for a horizontal branch serving fixtures other than toilets in a single stack vent system?
12 feet
What is the minimum pipe size for a fixture branching vertically from a horizontal branch in a single stack vent system?
2 inches
Fill in the blank:
In a single stack vent system, stacks greater than two branch intervals shall not receive discharge from horizontal branches on the lower ______ floors.
two
True or False:
Air admittance valves shall be permitted to be installed in plenums.
False
