Chapter 13 Vent and Venting

Question 1

1300

General

All installed fixture traps shall be protected by _______

Answer 1

1. A properly installed individual vent

Question 2

1301

General

Anti-siphon traps

Sinks in \_\_\_\_\_\_ may discharge to an anti-siphon trap provided that:
1.
2.
3.
(two notes)

Answer 2

• 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

Question 3

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?

Answer 3

1. above the center of the soil or waste pipe ahead of the trap being served.
2. 3 inches vertically above the flood level of the fixture served
3. horizontally
4. prior to connecting to the branch vent
   - rolled to a 45 degree angle before off-setting horizontally

Question 4

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

Answer 4

1. each branch shall be within the prescribed distance
2. Soil, waste and vent pipe shall be sized equivalent to individual installation
   Exception: Two water closets shall have a two-inch vent

Question 5

1304

Fixture vent pipe sizing

1304

All fixtures are vented with a minimum 1 1/2 pipe except:

1. 5 fixtures vented a minimum 1 1/4
2. one fixture vented 2 inches
3. One fixture should be vented indirectly when possible (otherwise 1 1/4)
4. 5 fixtures require no vent under certain circumstances
5. 2 fixtures should be vented independently

Answer 5

1. Residential bar sink, Beer taps, drinking fountains, cuspidors, dental units and lavatories
2. Washers
3. residential bar sinks
4. floor sinks, floor drains, floor urinals, mop sinks and shower stalls
5. commercial washers and commercial bar sinks

Question 6

Venting sump pumps

1304b

Answer 6

(in progress)

Question 7

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 _____

Answer 7

• revented

- at the highest level

Question 8

1306a(1)

No vent or revent required

6 fixtures can be vented without a vent or revent. What are they?

Answer 8

1. Shower stall
2. floor drain
3. Area drain
4. floor urinal
5. floor sink
6. mop sink

Question 9

1306a(2)

No vent or revent required

fixtures can be run with no vent required under the following condition(s):

1. Fixture is connected _____ and _______ to a soil or waste line

Answer 9

1. independently

2. horizontally

Question 10

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 ______

Answer 10

1. 3 feet downstream

2. 5 feet from any water closet opening

Question 11

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

1. __ for 2”
2. ___ for 3”
3. ___ for 4”
4. ___ for 5” and larger

Answer 11

1. 16’
2. 24’
3. 32’
4. 45’

Question 12

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 ____

Answer 12

1. 6 1/2’

Question 13

1306b

No vent or revent required

down_____, rainwater leader ___ and _____ sump pit

Answer 13

1. spout
2. trap
3. subsoil

Question 14

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

Answer 14

• vertical
  1. mechanical refrigeration
  2. space cooling equipment
  3. pans required under water heaters
  4. discharge from water heater relief valves

-cannot

Question 15

1307

Offset vent

Answer 15

(in process)

Question 16

1308

Prohibited vent connections

a. vents from fixtures connected to a _____, ___ and ___

Answer 16

1. grease interceptor
2. Blow-off basin
3. Chemical waste

Question 17

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 _____

Answer 17

• 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

Question 18

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 _____

Answer 18

a. p-trap
b. continuous vent
c. extend horizontally, vent stack, stack vent
d. condensation can drain from the vent line

Question 19

1311

Revent

shall be placed _____ not to exceed ____ from the fixture opening

Answer 19

-as close to the fixture opening as possible, 2’ developed length

Question 20

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

Answer 20

• 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
  
  1. 3”, 2”, 1 1/2”, 4”
  2. branch vents

Question 21

1312b

Venting through the roof

1. . Penetrations through the roof shall be ____ and ___ to the increaser.
2. vents shall be ____ in diameter through the roof or greater.
3. branches connecting to the stack shall be within ____

Answer 21

1. a minimum of 12 inches above the roof line and, 12 to 18 inches below the roof line
2. 4”s
3. 15 feet

Question 22

1313

Size of vent piping

1. no more than ____ on 1 1/2
2. A restroom group containing one water closet, one lavatory and one ____ may be vented with ____

Answer 22

1. water closet

2. urinal, 1 1/2

Question 23

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:

1. a maximum of ____ shall be permitted to be stack vented on a ____ above a stack-vented ___
2. Bathtubs or shower vents may be stack vented when connected through a ______ at the ____, when installed in a three inch or larger stack.

Answer 23

• 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

Question 24

1315

Stack vents

Extend soil or waste stacks vertically tas a vent stack from a point ___until penetrating the roof

Answer 24

-3 inches above the flood rim of the highest fixture

Question 25

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.

Answer 25

- one 1 1/2 inch vent. such a vent cannot be used as waste | - 1 1/2", 2", 10

Question 26

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

Answer 26

- drops and sags | - 1/16th inch

Question 27

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 ____

Answer 27

- waste | - stoppage

Question 28

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

Answer 28

a. independently, open air above b. full size, through, at, below, lowest horizontal waste branch, building drain c. two or more floors

Question 29

1320 Vent Terminal Placement Vent terminal placement shall be determined by the following 1. Terminated at least ___ above the roof and shall increase a minimum of ___ inches in diameter 2. The change in diameter shall be made inside the building at a point between ___ and ___ inches below the roof. 3. Shall be properly flashed.

Answer 29

1. 12, 4 | 2. 12, 18

Question 30

1. 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

Answer 30

1. beneath, 10, 2

Question 31

1320 Vent Terminal Placement B Vent terminal placement shall be determined by the following Soil and waste stacks shall not terminate: 2. Closer than ___ feet under any roof gable 3. Closer than ___ feet to any wall extending above a flat roof 4. Closer than __ feet to any fire wall 5. where the roof is used for any other reason than weather protection, the extension shall be run at least ___ feet above the roof

Answer 31

2. 2 3. 2 4. 6 5. 7

Question 32

1320 Vent Terminal Placement B Vent terminal placement shall be determined by the following Soil and waste stacks shall not terminate: 6. through a ____. exception: As provided for ___. 7. 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.

Answer 32

1. Sidewalk 2. 1 foot 3. two

Question 33

49-1321 Venting of water closets A. Battery Venting 1. 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 ____.

Answer 33

1. 2 2. 8 3. In front of the last fixture 4. Not receive the discharge of any soil or waste

Question 34

49-1321 Venting of Water Closets A. Battery Venting 2. In multiple-level buildings, the _____ connected to a vertical stack and serve more than ____ shall be provided with a relief vent taken off ______

Answer 34

1. Lower 2. 3 fixtures 3. In front of the first fixture connection

Question 35

49-1321 Venting of Water Closets A. Battery Venting 3. Circuit, loop or relief vents shall be taken off from the _____

Answer 35

1. The top of the horizontal branch

Question 36

49-1321 Venting of Water Closets A. Battery Venting 4. Each _____ shall connect ____ to the _____. The maximum distance of a _____ shall be _____ from the soil branch to the fixture opening

Answer 36

1. Water closet fixture drain 2. Horizontally 3. Horizontal branch 4. 5 feet

Question 37

49-1321 A. Battery Vent 5. The horizontal branch and fixture branch shall be_______.

Answer 37

1. The same size

Question 38

49-1321 A. Battery Venting 6. The maximum slope of the horizontal drain shall be ______.

Answer 38

1. Shall be a half inch per foot

Question 39

49-1321 Venting of water closets A. Battery venting: 7. Can other restroom group fixtures be added to the battery vent?

Answer 39

1. Yes as long as they are vented as required.

Question 40

49-1321 Venting of water closets B. Wet venting 1. Water closets may be wet-vented when the fixture units do not exceed____. Water closets cannot be wet-vented through a _____.

Answer 40

1. 4 | 2. Clothes washer

Question 41

49-1321 Venting of water closets B. Wet Venting 2. 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 _____.

Answer 41

1. Tub 2. Lab 3. 2 4. Lab waste

Question 42

49-1321 Venting of water closets C. Stack Venting 1. 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.

Answer 42

1. 5 feet

Question 43

49-1321 Venting of water closets C. Stack Venting 2. If a re-vent is required on the highest water closet, it must be no more than ____ from and _____ to the fixture opening.

Answer 43

1. 2 feet | 2. As close as possible

Question 44

49-1321 Venting of water closets C. Stack venting 3. 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 ____.

Answer 44

1. 4 | 2. 7

Question 45

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.

Answer 45

1. Back-to-back 2. Double-wye 3. 4

Question 46

49-1322 Vents for waste interceptors 1. If the branch line to the waste is ____ or less from the main building drain, no vent will be required 2. If more than ___ a ____ inch vent will be required 3. ______ kitchen fixture vents shall not be connected to vents from _______ fixtures.

Answer 46

1. 10 2. 10 3. 2 4. Commercial, non-commercial