General venting Flashcards
When sizing a circuit vent what is the developed length of the piping that should be used?
the horizontal soil or waste pipe to the VS, SV, VH, or outside air
list the 3 situations that a trap need not be protected by a vent:
4) A trap need not be protected by a vent pipe
a) where it serves
i) a subsoil drainage pipe, or
ii) a storm drainage system, or
b) where it forms part of an indirect drainage system (see also
2.5.1.1. 4) a) b)
What table is used to size vent stacks?
2.5.8.4.
List the requirements for venting an oil interceptor?
2 vents, opposite ends, extend independently, not less than 2 metres and differing by 300 mm.
State the minimum size of vent pipe required for a 4” wc:
1 1/2”
which table is used to size wet vents?
2.5.8.1.
When sizing a branch vent, what is the developed length?
from the most distant soil or waste pipe connection to a VS, SV, VH, our outside air.
what is the maximum size of every vent for a sewage sump?
not less than 2”, but need not be greater than 4”
what is the maximum hydraulic load that may be connected to a circuit vent?
3 fus
list the minimum size of vent pipping for a circuit vent (30 meters, 96 fus)
3”
When is a vent stack required with fixtures draining into it:
more than 4 storeys.
what size soil or waste stack, stack vent, and vent stack are required for an 8 storey building draining 250 fixture units? The length of the stack vent is 3 metres and the length of the vent is 25 metres.
WS/SS 4”, SV 2”, VS 3”
What size of vent pipe would be required for a sewage sump with a 3” inlet?
2”
2.5.7.7. one size smaller then the largest branch or fixture drain
not smaller than 2” not larger than 4”
how far away from an openable window or door can a vent terminate:
not less then 1 m above or not less than 3.5 m any other direction
What is the minimum size of branch vent required when connecting two bathroom groups with a total vent length of 7 meteres?
1 1/2”
what is the developed length that is used to size a vent header?
from the most distant soil or waste pipe connection to outside air
what is the minimum size of wet vent for a bathroom group with a kitchen sink, not symmetrically connected, to the wet vent?
3”
a soil or waste stack with 1.5 m offset, with 120 fixture units draining into the upper 3 storeys will require an offset relief vent?
2.5.4.4.
T or F
False
what is the minimum size stack vent required for a 3” wet vented soil or waste stack draining 43 fixture units from 6 storeys? the vent’s length is 12 m.
3”
what are the requirements for offsets in a wet vent?
no more than 1, does not exceed 1.2m for 2”, does not exceed 2.5m for 3”
list one requirement for connecting fixtures to a vent stack:
no more than 8 fus connect to the lowest or below lowest connection
when are additional circuit vents required with circuit vented branches?
when there is more than a 45 deg horizontal change OR more than 8 traps between the circuit vent and relief vent
how is a vent pipe protected from a frost closure?
making it a minimum of 3”, increasing it one size or insulating it.
how do you size a yoke vent?
one size smaller than the smallest pipe to which it is connected.
what is the largest size trap arm or fixture that can drain into a wet vent?
3” emergency floor drain
what would be the maximum number of tank type WCs that could drain into a wet vent?
0
What is the largest size trap arm or fixture drain that can drain into a wet vent?
3” emergency floor drain
What is the maximum number of tank type WC’s that can drain into a wet vent.
0
How do you size a wet vent?
Hydraulic load
How do you size a circuit vent?
By its FUs and developed length
How do you size a relief vent?
one size smaller then the circuit vent but not larger then 2”
2.5.7.3. 2)
what is the maximum number of circuit vented branch traps that can be installed between a circuit vent and a relief vent?
8 traps
“A circuit vented branch, including the fixture drain downstream of the circuit vent connection, shall be sized in accordance with article 2.4.10.7. , except that it shall be not less than b) _________ inches, where traps 2 inches in size or larger are circuit vented”
3”
urinals, toilets, showers
CVB = is 3” when 2” traps are circuit vented
“Additional circuit vents shall be required b) where more than _____ circuit vented fixtures are connected to a branch between vent pipe connections”
8
“A soil-or-waste pipe may serve as an additional circuit vent in accordance with sentence (6) provided that the soil-or-waste pipe is sized as a wet vent in conformance with article 2.5.8.1. and is not less than _______ inches in size”
2”
an additional circuit vent must be sized as a wet vent and is not smalle
“A section of horizontal branch may be circuit-vented provided no soil-or-waste stack is connected to it _________ of a circuit vented fixture”
upstream
