Chapter 13 Vent and Venting Flashcards
1300
General
All installed fixture traps shall be protected by _______
- A properly installed individual vent
1301
General
Anti-siphon traps
Sinks in \_\_\_\_\_\_ may discharge to an anti-siphon trap provided that: 1. 2. 3. (two notes)
- island counters
1. placed as close to the fixture as possible
2. waste is increased one size
3. a continuous vent is carried above the flood rim of the fixture to an approved vent - 5 foot does not apply to anti-siphon traps
- if the waste for the anti-siphon trap is run underground and the fixture only requires a 1 1/2 waste, only the above-ground portion need be increased in size
1302
Connection of waste pipe to soil or waste pipe
where a vent pipe connects to a soil or waste pipe, the vent shall be taken off_________. unless prohibited by structural conditions, all vents shall rise a minimum of _____ before off-setting _____ or _______.
-Bath tub vents and other such fixtures can be installed in what fashion?
- above the center of the soil or waste pipe ahead of the trap being served.
- 3 inches vertically above the flood level of the fixture served
- horizontally
- prior to connecting to the branch vent
- rolled to a 45 degree angle before off-setting horizontally
1303
Dual Vents
Two identical purpose fixtures on opposite sides of a wall can be served by a single vent pipe if:
1.
2. answer and exception to the rule
- each branch shall be within the prescribed distance
- Soil, waste and vent pipe shall be sized equivalent to individual installation
Exception: Two water closets shall have a two-inch vent
1304
Fixture vent pipe sizing
1304
All fixtures are vented with a minimum 1 1/2 pipe except:
- 5 fixtures vented a minimum 1 1/4
- one fixture vented 2 inches
- One fixture should be vented indirectly when possible (otherwise 1 1/4)
- 5 fixtures require no vent under certain circumstances
- 2 fixtures should be vented independently
- Residential bar sink, Beer taps, drinking fountains, cuspidors, dental units and lavatories
- Washers
- residential bar sinks
- floor sinks, floor drains, floor urinals, mop sinks and shower stalls
- commercial washers and commercial bar sinks
Venting sump pumps
1304b
(in progress)
1305
Fixtures at different levels
Any stack that has fixtures entering at different levels shall have the fixtures ______ with the exception of the fixture entering _____
- revented
- at the highest level
1306a(1)
No vent or revent required
6 fixtures can be vented without a vent or revent. What are they?
- Shower stall
- floor drain
- Area drain
- floor urinal
- floor sink
- mop sink
1306a(2)
No vent or revent required
fixtures can be run with no vent required under the following condition(s):
- Fixture is connected _____ and _______ to a soil or waste line
- independently
2. horizontally
1306a(3)
No vent or revent required
fixtures can be run with no vent required under the following condition(s):
Located ______ of the base of a properly sized soil, waste or vent stack and _____ from any ______
- 3 feet downstream
2. 5 feet from any water closet opening
1306a(4)
No vent or revent required
fixtures can be run with no vent required under the following condition(s):
branch length is no longer than
- __ for 2”
- ___ for 3”
- ___ for 4”
- ___ for 5” and larger
- 16’
- 24’
- 32’
- 45’
1306a(5)
No vent or revent required
fixtures can be run with no vent required under the following condition(s):
Waste piping may not exceed a single vertical rise of more than ____
- 6 1/2’
1306b
No vent or revent required
down_____, rainwater leader ___ and _____ sump pit
- spout
- trap
- subsoil
1306c
No vent or revent required
A _____ waste that receives condensate from:
1.
2.
3.
4.
and
This waste stack (can/cannot) be used for other waste or vent for other “no-vent-required” fixtures
- vertical
1. mechanical refrigeration
2. space cooling equipment
3. pans required under water heaters
4. discharge from water heater relief valves
-cannot
1307
Offset vent
(in process)
1308
Prohibited vent connections
a. vents from fixtures connected to a _____, ___ and ___
- grease interceptor
- Blow-off basin
- Chemical waste
1309
Relief Vents
Soil and waste stack in buildings exceeding ____ shall be provided a with a relief vent at each ____ and installed as follows
a. begin with the _____
b. the size of the relief vent shall be ___ to the size of the ____
c. the ____ of each relief vent shall be connected to the soil or waste stack through a ______
d. the _____ shall connect to the vent stack through a wye _____
- 10 branch intervals, 10th interval
a. the top floor
b. equal, of the vent stack to which it is connected
c. lower end, wye below the horizontal branch serving the floor
d. upper end not less than 42 inches above the floor level
1310
Return vents
Island fixtures installed as follows:
a. ____ placed as close to the fixture as possible
b. ____ shall be carried from above the floor level to the fixture and _____ to a ___ or _____
c. The vent may be run downward to _____ or _____ and carried to and connected with a properly sized branch or main vent
d. run so that _____
a. p-trap
b. continuous vent
c. extend horizontally, vent stack, stack vent
d. condensation can drain from the vent line
1311
Revent
shall be placed _____ not to exceed ____ from the fixture opening
-as close to the fixture opening as possible, 2’ developed length
1312a
Size of stacks equal to area of building drain
shall be a vent(s) that terminates through the roof that originates from _____. Following provisions apply:
a. total area of vent(s) shall be ____ than the area of ____
b. area is not based on the ____
c. Shall be a minimum of ____ in a dwelling provided that the following may apply:
1. A ____ plus a ____ and a ____ will be considered a ____
2. _____ may be connected to a single increaser
- largest section of the building drain
a. equal to or greater than, largest section of the building drain
b. size of the increaser
c. one 3-inch diameter stack- 3”, 2”, 1 1/2”, 4”
- branch vents
1312b
Venting through the roof
- . Penetrations through the roof shall be ____ and ___ to the increaser.
- vents shall be ____ in diameter through the roof or greater.
- branches connecting to the stack shall be within ____
- a minimum of 12 inches above the roof line and, 12 to 18 inches below the roof line
- 4”s
- 15 feet
1313
Size of vent piping
- no more than ____ on 1 1/2
- A restroom group containing one water closet, one lavatory and one ____ may be vented with ____
- water closet
2. urinal, 1 1/2
1314
Stack venting
Highest fixture on a stack may have a soil or waste branch extended from a ___, ____ or a without installing a revent as long as the line doesn’t exceed the prescribed distance. Conditional upon:
- a maximum of ____ shall be permitted to be stack vented on a ____ above a stack-vented ___
- Bathtubs or shower vents may be stack vented when connected through a ______ at the ____, when installed in a three inch or larger stack.
- sanitary tee, figure five fitting or a fixture fitting (?)
1. 4, 3 inch or larger stack, stack vented water closet
2. sanitary tee with a side inlet, same level as the stack vented water closet
1315
Stack vents
Extend soil or waste stacks vertically tas a vent stack from a point ___until penetrating the roof
-3 inches above the flood rim of the highest fixture
1316
Vent for future use
In all dwelling units with basements, a minimum of ___will be required in the basement and in a manner so as it____.
Cannot be connected to a ___ or ___ with more than ___ fixture units already connected to it.
- one 1 1/2 inch vent. such a vent cannot be used as waste
- 1 1/2”, 2”, 10
1317
Vent pipe grade
- free from ___
- all vents and branch vents shall be sloped a minimum of ___ and drain back into a soil or waste line
- drops and sags
- 1/16th inch
1318
Vents piped in such as manner as to become waste
Vent pipes shall be connected in such as manner preventing them frp, serving as a ___ in case of ____
- waste
- stoppage
1319
Vent Stacks
Vent stack or main stack shall be observed with the following provisions:
a. shall terminate ___ in the ____ the building or shall be connected with the stack vent
b. shall be run downward ____ and connected to te soil or waste pipe ___,___ or ___ below the ___ or with the ____
c. Whenever back vents, relief vents or other branch vents are required on ___, the vent stack shall be installed with soil or waste stacks
a. independently, open air above
b. full size, through, at, below, lowest horizontal waste branch, building drain
c. two or more floors
1320 Vent Terminal Placement
Vent terminal placement shall be determined by the following
- Terminated at least ___ above the roof and shall increase a minimum of ___ inches in diameter
- The change in diameter shall be made inside the building at a point between ___ and ___ inches below the roof.
- Shall be properly flashed.
- 12, 4
2. 12, 18
- Directly ___ any door, window or ventilating openings of the building or adjacent building not be within ___ feet horizontally of such opening unless it is at least ____ feet above the top of such opening
- beneath, 10, 2
1320 Vent Terminal Placement B
Vent terminal placement shall be determined by the following
Soil and waste stacks shall not terminate:
- Closer than ___ feet under any roof gable
- Closer than ___ feet to any wall extending above a flat roof
- Closer than __ feet to any fire wall
- where the roof is used for any other reason than weather protection, the extension shall be run at least ___ feet above the roof
- 2
- 2
- 6
- 7
1320 Vent Terminal Placement B
Vent terminal placement shall be determined by the following
Soil and waste stacks shall not terminate:
- through a ____. exception: As provided for ___.
- Vents for fixtures in a commercial kitchen shall extend ___ above any wall extending above the roof when ___ or more walls of a building extend above the roof.
- Sidewalk
- 1 foot
- two
49-1321
Venting of water closets
A. Battery Venting
- horizontal soil branch that is properly sized to receive the discharge of ____ but not more than ___ floor outlet water closets, may be vented by a circuit or a loop vent, which shall be taken off in _______. The circuit or relief vent shall ____.
- 2
- 8
- In front of the last fixture
- Not receive the discharge of any soil or waste
49-1321
Venting of Water Closets
A. Battery Venting
- In multiple-level buildings, the _____ connected to a vertical stack and serve more than ____ shall be provided with a relief vent taken off ______
- Lower
- 3 fixtures
- In front of the first fixture connection
49-1321
Venting of Water Closets
A. Battery Venting
- Circuit, loop or relief vents shall be taken off from the _____
- The top of the horizontal branch
49-1321
Venting of Water Closets
A. Battery Venting
- Each _____ shall connect ____ to the _____. The maximum distance of a _____ shall be _____ from the soil branch to the fixture opening
- Water closet fixture drain
- Horizontally
- Horizontal branch
- 5 feet
49-1321
A. Battery Vent
- The horizontal branch and fixture branch shall be_______.
- The same size
49-1321
A. Battery Venting
- The maximum slope of the horizontal drain shall be ______.
- Shall be a half inch per foot
49-1321
Venting of water closets
A. Battery venting:
- Can other restroom group fixtures be added to the battery vent?
- Yes as long as they are vented as required.
49-1321
Venting of water closets
B. Wet venting
- Water closets may be wet-vented when the fixture units do not exceed____.
Water closets cannot be wet-vented through a _____.
- 4
2. Clothes washer
49-1321
Venting of water closets
B. Wet Venting
- If they are on the same wall a water closet and a ____ may be wet-vented through a ___.
The _____ waste needs to be within ___ feet of the _____.
- Tub
- Lab
- 2
- Lab waste
49-1321
Venting of water closets
C. Stack Venting
- The highest water closet on a stack may have a waste branch not to exceed ____ from the center of the stack w/o installing a re-vent.
- 5 feet
49-1321
Venting of water closets
C. Stack Venting
- If a re-vent is required on the highest water closet, it must be no more than ____ from and _____ to the fixture opening.
- 2 feet
2. As close as possible
49-1321
Venting of water closets
C. Stack venting
- Max number of fixture units that can be permitted above a stack vented water closet shall not exceed _. A clothes washer may be discharged above the wc provided the distance from the connection to the wc and the invert of the horizontal waste doesn’t exceed ____.
- 4
2. 7
49-1321
Venting of water closets
D. Horizontal Double-wye
Two floor wall outlets installed _____ may be installed using a ______ provided that a long or short sweep of the same size and extended vertically for purposes of a clean-out.
A max of ____ fu may be allowed on this vent.
- Back-to-back
- Double-wye
- 4
49-1322
Vents for waste interceptors
- If the branch line to the waste is ____ or less from the main building drain, no vent will be required
- If more than ___ a ____ inch vent will be required
- ______ kitchen fixture vents shall not be connected to vents from _______ fixtures.
- 10
- 10
- 2
- Commercial, non-commercial
