Chapter 9 Vents Flashcards
The main purpose of venting is for _____.
trap seal protection
901.2
The vent system is necessary to prevent pneumatic pressure differentials of more than _______ against the trap seal of any fixture.
1” of water column
901.2
The vent system of a chemical or acid waste system must be____________.
independent of the sanitary vent system
901.3
Field fabricated lead flashings shall weigh not less than _____ pounds per square foot.
3 Pounds per square foot
902.3
What is the minimum number of vent terminals that are required to extend to the atmosphere?
One
904.1
A vent stack connection to the base of a stack is required to connect________.
At or below the lowest horizontal branch
904.4
Where required to be protected against frost closure, the vent extension through the roof shall be not less than ___inches in diameter beginning not less than___ inches below the roof.
3 inches & 12 inches
903.2
What is the minimum required height of a vent terminal located on a roof that is used for purposes besides weather protection.
7 feet
903.1
A vent shall terminate a minimum of ___feet horizontally from or at least __feet above a window opening.
10 feet & 3 feet
903.5
What is the minimum required height above grade for a vent terminating through the side wall of a building.
10 feet
903.6
A dry vent is prohibited from offsetting horizontally until the vertical rise of the vent is _____.
6 inches above the flood level rim of the highest fixture being vented. 905.4
A kitchen sink with a 1 1/2-inch fixture drain must be vented within a developed length of __ feet from the trap weir to the vent fitting.
6 feet
Table 909.1
Which fixture is allowed to have a vent connection to the fixture drain below the trap weir?
water closet
909.2
In no case shall the diameter of a stack vent and vent stack be less than one-half the diameter of the drain served or less than ___ inches.
1 1/4 inch
906.1
Vents exceeding ___ feet in developed length shall be increased by one nominal size for the entire developed length of the vent pipe.
40 feet
906.2
Every building in which plumbing is installed shall have at least one dry vent that extends to the____.
Outdoors
904.01
The minimum height a sanitary sewer vent shall terminate above a roof is ____.
6 inches
903.1 GA Amendment
Vent stacks shall connected at or below the lowest horizontal branch and where the vent stack connects shall be located downstream of the drainage stack and _______________.
within a distance of ten times the diameter of the building drain.
904.4
The maximum distance a 3” trap shall be located from its vent is______.
12 feet
Table 909.1
When two fixtures are common vent and connected at different levels, the upper fixture cannot be a _____.
Water Closet
911.3
Sheet copper used for flashing material must be a minimum weight of______.
8 ounces per square feet
902.2
All vent piping must be sloped such that all moisture will be drained to the drainage system by _________.
Gravity
905.2
When a dry vent is connected to a drain line it shall be connected ________.
Above the center line of the horizontal drain pipe
905.3
A connection between a vent and a vent stack or stack vent must be made a minimum of ___ inches above the flood level rim of the highest fixture served by the vent
6 inches
905.5
A 4-inch trap can be located a maximum of ______ from a vent.
16 feet (48 x 4" = 192") Table 909.1
The maximum distance a 3” trap shall be located from its vent is_____.
12 feet( 48 x 3" = 144") Table 909.1
A vent installed within less than two pipe diameters of its trap would be a code violation and would be referred to as a___.
Crown vent
909.3
A common vent can serve ___ fixture(s) located on the same floor level.
Two
911.1
A wet vent may serve _________.
Any combination of fixture within two bathroom groups located on the same floor level
912.1
The dry vent for a horizontal wet vent system cannot be connected to the _____.
Emergency floor drain
912.2.1
Each wet-vented fixture drain shall connect _______ to the horizontal wet vent.
Independently
912.1
A waste stack that is part of a waste stack vent system shall be installed vertically with every fixture drain connected _______.
Separately
913.2
Which fixtures can connected to a waste stack vent system?
Floor drains , mop sinks , drinking fountains & lavatories
913.2
The stack vent for a waste stack vent system shall not be less than_____.
The size of the stack it is connected to
913.3
A circuit vent may protect a maximum of__ fixture traps with their fixture drains connected to a horizontal branch drain.
Eight
914.1
Where is the circuit connected to the horizontal branch?
Between the two most upstream fixture drains connected to the horizontal drain
914.2
A horizontal combination waste & vent is to be installed in the kitchen of a restaurant.The horizontal main waste pipe is 6”. The minimum size of the downstream vent must be no less than ____”.
3”
915.2.4
What is the minimum size required for a stack vent serving a 2 1/2” waste stack?
2 1/2”
913.3
A relief vent is required when a circuit vented branch receives the discharge of how many water closets & it connects to a stack receiving discharge from above?
4 or more
914.4
A circuit vent is prohibited from receiving any discharge, but a relief vent is permitted to be a fixture drain when the discharge is not more than _________.
4 DFU’s
914.4.2
The maximum slope of a horizontal combo waste & vent pipe ?
1/2” per foot
915.2.1
Where does the vent of an individually vented fixture connect to ?
fixture drain of the trapped fixture
910.1
Where two fixtures connect at different levels of a vertical drain pipe, the common vent is sized based on what?
max discharge of the upper fixture drain
911.3 & Table 911.3
Where do you connect fixture not in a bathroom group to the horizontal wet vent that serves the bathroom group?
downstream of the horizontal wet vent
912.1
In a horizontal wet vent system, how many wet vented fixture drains are allowed to discharge upstream of the dry vent connection?
1
912.2.1
What is the maximum number of branch intervals that an air admittance may serve as the vent stack terminal?
6
918.3.2
The minimum number of inch an air admittance valve most be above insulation materials?
6”
918.4
If a waste stack has more than 10 branch intervals,the relief vent will be sized in accordance with what?
the vent stack serving the waste stack
908.2
Which of these systems would you use on the bathrooms for a multistory hotel, single stack vent or a waste stack vent?
Single stack vent
913.2 & 917.2
Which vent system allows the vent to be offset below the fixture drain served by the system.
Island fixture vent
916.2
