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Vent pipes protect fixture traps against...
Vent pipes protect fixture traps against...
siphonage
Traps serving sinks that are part of the equipment of bars, soda fountains, and counters need to be vented.
Traps serving sinks that are part of the equipment of bars, soda fountains, and counters need to be vented.
False (B)
One factor for determining the size of a vent pipe is...
One factor for determining the size of a vent pipe is...
its length
The combination of vent pipes that will provide sufficient aggregate cross sectional vent area for a required 4 inch house sewer is...
The combination of vent pipes that will provide sufficient aggregate cross sectional vent area for a required 4 inch house sewer is...
The maximum horizontal length permitted for a required 2 inch vent pipe is...
The maximum horizontal length permitted for a required 2 inch vent pipe is...
The diameter of an individual vent shall not be less than...
The diameter of an individual vent shall not be less than...
The minimum distance a vent must rise above the flood level rim of the fixture it serves before it may offset horizontally is...
The minimum distance a vent must rise above the flood level rim of the fixture it serves before it may offset horizontally is...
A 2 inch vent pipe will serve how many lavatories?
A 2 inch vent pipe will serve how many lavatories?
Each vent pipe or stack shall extend through its flashing and shall terminate vertically above the roof at least...
Each vent pipe or stack shall extend through its flashing and shall terminate vertically above the roof at least...
Each vent pipe or stack shall be located at least how far away from a vertical surface?
Each vent pipe or stack shall be located at least how far away from a vertical surface?
Horizontal termination of vents from any openable window, door opening, air intake, or vent shaft shall be not less than...
Horizontal termination of vents from any openable window, door opening, air intake, or vent shaft shall be not less than...
Joints at the roof around vent pipes shall be made water tight by the use of...
Joints at the roof around vent pipes shall be made water tight by the use of...
Except for alleys and streets, vent termination from property lines shall not be less than...
Except for alleys and streets, vent termination from property lines shall not be less than...
Vents terminating in roof areas used for sun bathing shall be extended above the roof at least...
Vents terminating in roof areas used for sun bathing shall be extended above the roof at least...
Parallel vent stacks are required for drainage stacks that extend above the building drain...
Parallel vent stacks are required for drainage stacks that extend above the building drain...
The parallel vent stack shall be connected to the drainage stack by means of a...
The parallel vent stack shall be connected to the drainage stack by means of a...
The pipe size for the common vent serving lavatories installed back to back shall be not less than...
The pipe size for the common vent serving lavatories installed back to back shall be not less than...
Horizontal drain pipes shall be level or so graded as to drip back by gravity to the...
Horizontal drain pipes shall be level or so graded as to drip back by gravity to the...
The minimum size vent pipe that may serve a 4 inch trap is...
The minimum size vent pipe that may serve a 4 inch trap is...
Increasing vents one pipe size will...
Increasing vents one pipe size will...
Changes in direction of vent piping shall be made by...
Changes in direction of vent piping shall be made by...
A drainage stack extends 14 stories above the building drain and is served by a parallel vent stack. A relief yoke vent connection between the vent stack and the drainage stack is required at floors...
A drainage stack extends 14 stories above the building drain and is served by a parallel vent stack. A relief yoke vent connection between the vent stack and the drainage stack is required at floors...
The fitting that is required for making the yoke vent intersection with the drainage stack is a...
The fitting that is required for making the yoke vent intersection with the drainage stack is a...
The size of the yoke vent shall be...
The size of the yoke vent shall be...
If, due to structural conditions, horizontal vents are less than 6 inches above the overflow rim of the fixture, the horizontal portion shall be installed with...
If, due to structural conditions, horizontal vents are less than 6 inches above the overflow rim of the fixture, the horizontal portion shall be installed with...
Vent terminals in locations having minimum design temperatures below 0 degrees F shall be a minimum of...
Vent terminals in locations having minimum design temperatures below 0 degrees F shall be a minimum of...
Copper tube shall not be used for...
Copper tube shall not be used for...
ABS or PVC DWV piping installations exposed within ducts or plenums shall be limited to a flame spread index of not more than 25 or a smoke index of 50 except for...
ABS or PVC DWV piping installations exposed within ducts or plenums shall be limited to a flame spread index of not more than 25 or a smoke index of 50 except for...
Sheet lead used for flashings of vent terminals shall be not less than _______ pounds per square foot.
Sheet lead used for flashings of vent terminals shall be not less than _______ pounds per square foot.
In a combination waste and vent system, the size of the trap arm must be increased by...
In a combination waste and vent system, the size of the trap arm must be increased by...
The minimum size drain to supply to a kitchen island sink is...
The minimum size drain to supply to a kitchen island sink is...
The maximum length a combination waste and vent system branch can go horizontally without being separately vented is...
The maximum length a combination waste and vent system branch can go horizontally without being separately vented is...
A 2 inch floor drain connected to a combination waste and vent system must be connected to a drain pipe at least...
A 2 inch floor drain connected to a combination waste and vent system must be connected to a drain pipe at least...
The area of a vent installed in a combination waste and vent system shall be not less than...
The area of a vent installed in a combination waste and vent system shall be not less than...
Long mains shall be provided with relief vents at intervals of...
Long mains shall be provided with relief vents at intervals of...
The connection from a waste line to a vent shall be...
The connection from a waste line to a vent shall be...
Water closets, bathtubs, showers, and floor drains within one or two bathrooms located on the same floor level for private use shall be permitted to be vented by a...
Water closets, bathtubs, showers, and floor drains within one or two bathrooms located on the same floor level for private use shall be permitted to be vented by a...
Horizontal wet venting is...
Horizontal wet venting is...
The fixture that serves as a dry vent connection to the horizontal wet vent is a...
The fixture that serves as a dry vent connection to the horizontal wet vent is a...
The vent system shall be designed to prevent a trap seal from being exposed to a pressure differential on the outlet side of the trap that exceeds _______ inch of water column.
The vent system shall be designed to prevent a trap seal from being exposed to a pressure differential on the outlet side of the trap that exceeds _______ inch of water column.
The horizontal wet vent shall be not less than two inches in diameter for _______ drainage fixture units or less.
The horizontal wet vent shall be not less than two inches in diameter for _______ drainage fixture units or less.
The dry vent connection to the wet vent shall be a ______ vent.
The dry vent connection to the wet vent shall be a ______ vent.
The _____ fixture drain or trap arm connection to the horizontal wet vent shall be downstream of the fixture drain or trap arm connections.
The _____ fixture drain or trap arm connection to the horizontal wet vent shall be downstream of the fixture drain or trap arm connections.
An engineered vent system shall be designed by _______ and approved in accordance with section 301.4.
An engineered vent system shall be designed by _______ and approved in accordance with section 301.4.
Joints at the roof and around pipes shall be made water tight by the use of...
Joints at the roof and around pipes shall be made water tight by the use of...
Flashcards
Vent Pipe Function
Vent Pipe Function
Protect fixture traps from siphonage, ensuring proper drainage.
Vent Pipe Length Importance
Vent Pipe Length Importance
Crucial for determining vent size; longer vents require larger diameters.
Minimum Individual Vent Diameter
Minimum Individual Vent Diameter
1 1/4 inches
Capacity of a 2-inch Vent Pipe
Capacity of a 2-inch Vent Pipe
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Vent Offset Height
Vent Offset Height
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Maximum Length for a 2-inch Vent Pipe
Maximum Length for a 2-inch Vent Pipe
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Vent Pipe Extension Rule
Vent Pipe Extension Rule
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Vent Termination Distance
Vent Termination Distance
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Water-Tight Vent Joints
Water-Tight Vent Joints
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Vent Distance from Property Lines
Vent Distance from Property Lines
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Parallel Vent Stacks
Parallel Vent Stacks
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Yoke Vent Size
Yoke Vent Size
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Vent Terminal Size in Cold Climates
Vent Terminal Size in Cold Climates
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Copper Tube Restriction
Copper Tube Restriction
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Sheet Lead for Vent Flashings
Sheet Lead for Vent Flashings
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Trap Arm Size Increase
Trap Arm Size Increase
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Engineered Vent System
Engineered Vent System
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Wet Venting
Wet Venting
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Study Notes
Vent Pipe Functions and Requirements
- Vent pipes protect fixture traps from siphonage, ensuring proper drainage and functionality.
- Certain traps in sinks at bars, soda fountains, and counters may not require venting under specific conditions.
Sizing and Length of Vent Pipes
- The length of a vent pipe is critical for determining its size; longer vents require larger diameters.
- Minimum diameter for an individual vent must be 1 1/4 inches.
- A 2-inch vent pipe can serve up to 24 lavatories, reflecting its capacity in drainage systems.
Vent Installation Guidelines
- Vent pipes must rise at least 6 inches above the fixture's flood level before they can offset horizontally.
- Maximum horizontal length for a required 2-inch vent pipe is 120 feet, ensuring effective venting across distances.
Vertical Venting Standards
- Each vent pipe must extend at least 6 inches above the roof and be 12 inches from any vertical surface, preventing obstruction in airflow.
- Vents must terminate 10 feet away from any openable window, door, air intake, or vent shaft to ensure air quality.
Vent Connection Requirements
- Joints at the roof and around vent pipes need to be water-tight, achieved through approved flashing materials.
- Minimum distance for vent termination from property lines, except alleys and streets, is 3 feet.
Special Conditions for Venting
- For drainage stacks above 10 stories, parallel vent stacks are required to manage airflow effectively.
- The size of the yoke vent connected to drainage stacks should not be less than the smaller of the drainage or vent stack.
Additional Specifications
- Vent terminals in cold climates (below 0°F) must be at least 2 inches in diameter to withstand conditions.
- Copper tube is not permitted for chemical or industrial waste due to corrosion risks.
Flashing and Connection Guidelines
- Sheet lead for vent flashings must be a minimum of 3 pounds per square foot to ensure durability.
- In combination waste and vent systems, the size of the trap arm should increase by two pipe sizes for proper flow.
Compliance and Management
- An engineered vent system requires design by a registered professional and must adhere to established guidelines.
- Wet venting allows for efficient venting between multiple fixtures within a single system, streamlining plumbing layouts.
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