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39 Cards in this Set
- Front
- Back
Vent pipes protect fixture traps against _____________.
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siphonage
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Under certain circumstances, traps serving sinks that are part of the equipment of bars, soda fountains, and counters ______________.
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need not be vented
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One factor for determining the size of a vent pipe is __________.
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its length
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The total area in square inches that will provide sufficient aggregate cross-sectional vent area for required 4-inch house sewer is ________________or greater.
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12.56 sq in
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The maximum horizontal length permitted for a required 2-inch vent pipe is _____________ feet.
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40
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The diameter of an individual vent shall not be less than ____________ inches.
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1 -1/4
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A 2-inch vent pipe will serve a total of ___________ fixture units.
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24
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Each vent pipe or stack shall extend through its flashing and shall terminate vertically above the roof at least _______________ inches.
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6
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The distance from any vent pipe opening above the roof shall be at least ____________inches from any vertical surface.
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12
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Horizontal termination of vents from any openable window, door opening, air intake, or vent shaft shall be not less than _____________ feet.
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10
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Except for alleys and streets, vent termination from property lines shall not be less than ___________________.
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3 feet
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Vents terminating in roof areas used for sunbathing shall be extended above the roof at least ______________ feet.
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7
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Joints at the roof around vent pipes shall be made watertight by the use of ______________.
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flashings
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Parallel vent stacks are required for drainage stacks that extend above the building drain _____________.
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10 stories or more
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The parallel vent stack shall be connected to the drainage stack by means of a _________ vent.
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yoke
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The pipe size for the common vent serving lavatories installed back-to-back shall be not less than ______________ inches.
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1 -1/2
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Horizontal vent pipes shall be level or so graded as to drip back by gravity to the ____________.
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drainage pipe they serve
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The minimum size vent pipe that may serve a 4-inch trap is __________ inches.
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2
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Increasing vents one pipe size will ____________.
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allow vents of longer lengths
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Changes in direction of vent piping shall be made by ____________ .
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appropriate use of fittings
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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 _____________ and ______________.
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4, 9
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The fitting that is required for making the yoke vent intersection with the drainage stack is a ___________.
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wye branch
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What is the minimum size for a yoke vent intersection with the drainage stack?
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not less in diameter than either the drainage or the vent stack, whichever is smaller
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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 __________________________________.
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drainage material and fittings and grade to drain
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Vent terminals in locations having minimum design temperatures below 0°F shall be a minimum of ______________.
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2 inches
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Copper tube shall not be used for _______________.
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chemical waste
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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 _______________.
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singe-family homes
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Sheet lead used for flashings of vent terminals shall be not less than ___________ pounds per square foot.
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3
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Long mains shall be provided with relief vents at intervals of _______________ feet.
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100
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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 _____________ vent.
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wet
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Horizontal wet venting is ______________.
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allowed for 2 bathrooms in a dwelling or guest room on the same floor
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The fixture that serves as a dry vent connection to the horizontal wet vent is a ________________.
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lavatory
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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(es) of water column.
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1
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The horizontal wet vent shall not be less than 2 inches in diameter for _____________ dfu or less.
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4
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The dry vent connection to the wet vent shall be a(n) ________________ vent.
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individual
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The __________fixture drain or trap arm connection to the horizontalwet vent shall be downstream of any fixture drain or trap arm connections.
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water closet
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An engineered vent system shall be designed by _____________ and approved in accordance with Section 301.4.
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a registered design professional
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Joints at the roof, around pipes, shall be made water tight by the use of ______________.
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flashing material
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For 5 or more drainage fixture units, ____________ inch diameter pipe is the smallest size allowed.
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3
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