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119 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Which traps need not be vented? |
Subsoil drainage or storm drainage. The absence of sewer gases. |
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Maximum number of water closets vented through a wet vent? |
Two |
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How must 2 water closets be installed to both be wet vented if the vent pipe is vertical? |
At the same level by means of a double sanitary T |
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What is a wet vent in simple terms? |
A section of pipe that serves as both a drain and a vent. |
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How must 2 water closets be wet vented if the vent pipe is horizontal? |
Double Y fitting |
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Wet vented water closets must be installed _________ of all other fixtures . |
Downstream |
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Trap arms and fixture drains connecting to the wet vent do not exceed 2 inches in size except for? |
Connections from emergency floor drains. |
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What table determines hydraulic load permitted for a wet vent? |
2.5.8.1. |
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Separately vented fixtures are _____________when sizing the continuous vent that serves the wet vent. |
Not included |
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When a Wet vent vent extends through more than 1 story the total discharge from any 1 story above the first story does not exceed ___ fixture units. |
4 |
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What is the limit on the length of a wet vent? |
There is no limit |
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Wet vented portion of pipe is not reduced in size ( continuous throughout) except ________ |
For the portion upstream of an emergency floor drain. |
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A section of a HORIZONTAL BRANCH is permitted to be circuit vented provided that: A) B) C) |
A) a circuit vent is connected to it. B) all fixtures served by the circuit vent are in the same story C)no soul or waste is connected upstream of a circuit vented fixture. |
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Fixtures with fixture outlets pipes less than 2 inches shall be ______ |
Separately vented or separately circuit vented. |
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A relief vent shall be connected to the branch that forms part of the circuit vented system , downstream of the connection of the ________ |
most down stream circuit vented fixture . |
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What is the maximum hydraulic load of a soil or waste pipe permitted to act as a relief vent? |
6 fixture units |
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A symmetrically connected relief vent is permitted to serve as a combined relief vent for a maximum of 2 branches that are circuit vented , provided there are _______ |
Not more than 8 circuit vented fixtures connected between the combined relief vent and each circuit vent. |
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Where are additional circuit vents required? ( 2 items) |
1) where each cumulative horizontal change in direction of a branch serves by a water closet exceeds 45• between vent pipe connections 2)where more than 8 circuit vented fixtures are connected to a branch between the circuit and relief vents. |
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A soil or waste pipe is permitted to serve as an additional circuit vent provided that: |
The soil or waste pipe is 2” or larger and sized as a wet vent in accordance to 2.5.8.1. |
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Hydraulic load of a circuit vent from fixtures connected to the branch served by a circuit vent but shall not include the hydraulic load from _______ |
The first or most upstream fixture |
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What shall the upper end of every soil and waste stack terminate in? |
Stack vent |
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When must we install a vent stack? |
(1)When the soil or waste stack exceeds 4 stories unless (2) the soil or waste stack serves as a wet vent. |
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Where must a vent stack connect to a soil and waste stack? |
In the vertical sections at or immediately below the lowest soil or waste connection to the soil and waste stack. |
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Fixtures are permitted to be connected to a vent stack provided : |
A)total hydraulic load of connected fixtures does not exceed 8 fixture units. B)at least one fixture is connected to a vertical portion and upstream of any other fixture. C) no other fixture is located downstream of a water closet. D)all fixtures are located on the lowest story served by the vent stack E) the sections of the vent pipe that acts as a wet pipe confirms to that. |
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What is a yoke vent? |
A connection between the vent stack and soil and waste stack to provide extra circulation. |
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When is a Yoke vent required? |
When a soil and waste stack receives discharge from 11 or more stories. |
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How often must a yoke vent connection be installed? |
Every 5 stories from the top down and wherever there is an offset or double offset. |
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Yoke vent shall be connected with a ________ at or _____________. |
Drainage fitting At or immediately below the the lowest soil or waste pipe connected to the soil or waste stack. |
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Yoke vent must be installed at least ______ above the floor level of the lowest story in the 5 story section . |
1m |
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A Yoke vent is not needed when |
The waste stack and vent stack are interconnected on each and every floor by a vent pipe. |
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When do we need an offset relief vent? |
When the nominally horizontal offset is more than 1.5 m and the upper vertical portion passes through more than 2 stories and receives a hydraulic load of more than 100 fixture units. |
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When may a trap arm (that has a hydraulic load of no more than 1 1/2 fixture units) of a fixture drain into a the vertical section of a ( circuit, relief, additional or Yoke) vent? |
Where not more than 2 fixtures are connected to the vent pipe , when 2 fixtures are connected by a double sanitary T, the section that acts as a wet vent is not less than 2 inches. |
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All sump pumps that receive sewage shall be ______ |
Provided with a vent pipe at the top of the sump |
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Every oil interceptor shall be processed with 2 vent pipes that connect to the interceptor at ____________, extend ________ to outside air, terminate not less than ________ above ground and at elevations differing by at least _______ |
opposite ends. independently 2m 300mm |
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How must adjacent compartments of an oil interceptor be connected? |
By a vent opening |
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Secondary oil receivers shall be vented in accordance of manufacturers specs and shall be in no case less than ______in size, extend _______ to outside air and terminate not less than _____ above ground. |
11/2” in size , independently 2m |
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Vent pipes that serve oil interceptors shall be not less than 3” in size in areas where_____ |
It may be subject to frost closure. |
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fresh air inlet on a building trap must be installed not less than ___ in size , and connected ________ and within ____of said trap and downstream of ___________ |
4” Vertically 1.2m any other connection. |
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What size must a vent pipe be installed for a provision of future connections? |
1 1/2” |
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Why must vent pipes be installed free of depressions? |
To avoid areas where moisture can collect. |
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Except for wet vents, where shall vent pipes be connected to horizontal soil and waste pipes ? |
Above the center line . |
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What shall be installed to unused vent pipes for futures? |
Permanently capped with end clean out or adapter and plug . |
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Developed length of a trap shall not be less than _______ of the fixture drain. |
Twice the size |
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Total fall of a trap arm must not be : |
Greater than its inside diameter and does not have a cumulative change in direction of 135• |
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Max change in direction of trap arms for water closets? |
225• |
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For water closets, what is the maximum distance of the fixture drain between the fixture and the vent pipe ? |
1m vertical and 3 m horizontally |
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Water closet depend on what for proper function? |
Siphonic action |
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Except for a wet vent , every vent pipe shall extend above the flood level rim of every fixture before_____ |
Being connected to another vent pipe |
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Where must all vent pipes terminate in a building 4 storeys or less ? |
Through the roof. |
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How far from an air inlet, window or door must a vent terminate to outside air ? |
Not less than 1m above and not less 3.5 in any direction from |
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How must a vent terminal be installed in a roof that supports and occupancy (deck, pool)? |
At least 2m above and 3.5 in any direction away from . |
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How far above ground and from a property line must a vents terminate ( 2 answers) |
Min 2m Min 1.8m |
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Min distance above storm water ponding on a roof a vent shall terminate ? |
150mm |
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What must be installed to prevent water from entering the building between vent and roof? |
500mm X 500mm of flashing |
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How do we prevent front closure in a vent pipe ? |
Increasing diameter by one size ( not less than 3”) before penetrating roof or Insulating pipe |
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What is table 2.5.7.1.? |
Minimum permitted pipe size of vent based on size of trap served. |
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Hydraulic Load of bathtub (w/or w/out shower) |
1 1/2 |
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Hydraulic load of a floor drain? |
2 |
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Size of Vent pipe based on 1 1/4” and 1 1/2” traps? |
1 1/4” |
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Size of a vent pipe based on a 2,3 or 4” trap? |
1 1/2” |
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Minimum size of vent pipe for 5” and 6” traps? |
2” |
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Fixture units for a Lavatory? |
1” w/ 11/4” trap 11/2 for a common 11/2 trap serving a 2 lavs |
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Fixture units for showers A) 1 head B)2-3 heads C) 4-6 heads |
A) 11/2fu B) 3FU C) 6FU |
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Minimum size of a vent pipe for a manhole? |
2” |
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Minimum size of vents for a building drain ? |
3” |
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Min and max size of additional circuit vents and relief vents ? |
One size smaller than vent pipe and not more than 2” |
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Minimum size of offset relief vent? |
One size smaller than size of stack vent |
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Minimum size of a Yoke vent |
One size smaller than size of smallest pipe to which they are connected. |
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Minimum and maximum size of a vent for a sewage sump |
One size smaller to a min of 2” and a max of 4” |
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Min size for a macerating toilet ? |
11/2” |
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Basis of Table 2.5.7.1. |
Minimum permitted size of vent pipe based on trap served. |
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Basis of Table 2.5.8.1. |
Maximum permitted Hydraulic loads drained to a wet vent |
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When sizing an __________vent it a _____vent the length is not taken into consideration. |
Individual Dual |
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What table is used to size individual and dual vents? What is it based on? |
2.5.7.1. Size of largest trap served |
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What table is used to size Branch vents, vent headers, circuit vents and continuous vents? |
2.5.8.3. |
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The Length of a VENT HEADER shall be it’s developed length___________ |
From the most distant soil or waste pipe connection to outside air. |
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The length of a CIRCUIT VENT shall be it’s developed length from ________________ connection to a __________,__________,________ or outside air. |
horizontal soil and waste connection vent stack , stack vent, vent header |
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What table do you use to size branch vents , vent headers, circuit vents and continuous vents? |
2.5.8.3. |
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What information is needed to size a Stack Vent or vent stack on table 2.5.8.4.? |
Table 2.5.8.4. You need the size of the soil and waste stack at its base, total hydraulic load being vented and the developed length. |
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for which vents is length not taken into consideration when sizing vents? There’s 8 of them. **** |
Additional circuit vents, offset relief vents, relief, Yoke and vents pipe for interceptor, dilution tanks, sewage tanks and manholes |
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What 4 places can air admittance valves be used? |
1) island sinks/fixtures 2)fixtures affected by frost closures 3)1 and 2 family dwellings under renovations where vent connections may not be practical 4) installations where it may not be practical |
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Air admittance valves shall be installed according to what? |
Manufacturers instructions. |
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Size a Dual Vent |
Size of largest trap 2.5.7.1. |
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Size an individual vent |
Size of largest trap 2.5.7.1. |
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Hydraulic Load of a Stall type Urinal |
2 |
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Size a continuous vent |
Hydraulic load of wet vented fixtures served and developed length 2.5.8.4. 2.5.7.1. |
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Size a Stack Vent |
Hydraulic load at base of stack served, hydraulic load of additional vents connected , length of stack vent |
2.5.8.4. 2.5.7.1. |
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Size Vent headers |
Hydraulic load at base of stacks, hydraulic load of additional vents connected , length of header , min 1/2 size of stack at its base. |
2.5.8.3 2.5.7.1. |
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Sizing criteria for Wet Vent |
Hydraulic load draining into lowest portion of wet vent , no more than 2 WC symmetrically connected , wet vent full size throughout, no more than 4 FU/storey above first story, except most downstream. |
2.5.7.1. 2.5.8.1. |
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Hydraulic load of a wall type washout urinal? |
11/2 |
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Hydraulic load of a Water closet? |
4 |
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Sizing circuit vents |
Hydraulic load draining into section being sized requires a relief vent downstream of lowest fixture outlet less than 2” must be individually vented or separately circuit vented. |
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A continuous vent is considered to be a _______vent. |
Dry |
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Yoke vents must be installed in buildings that receive discharge from fixtures located in more than ____ stories |
11 |
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The developed length of a continuous vent is measured from the __________ soil and waste pipe connection to a _______, _________, _______ or open air . This is found in clause#_____ |
Vertical Vent stack, stack vent, vent header 2.5.8.3. |
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List the conditions in which a nominally horizontal offset will require 2 offset relief vents. |
Offset is greater than 1.5m Upper vertical portion of the stack passes through more than 2 stories Received a hydraulic load of more than 100 fixture units. |
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Size a relief vent |
One size smaller than circuit vent 2.5.7.1. |
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Size additional circuit vent |
One size smaller than circuit vent-max 2” 2571 |
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Size Offset relief vents |
2 required One size smaller than stack vent |
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Size Yoke vent |
One size smaller than pipe connected to |
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Minimum size for a Manhole Vent ? |
2” |
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Sump Vent |
One size smaller than largest inlet Min 2”, max 4” |
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Oil interceptor Vents |
2 required , min 11/4” |
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Fresh Air inlets |
Min 4” less than 1.2m upstream ( for building traps) |
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What is an island vent? |
Vent used to vent a fixture installed in a location where it is impossible to connect the vent above the flood level rim of the fixture being vented. |
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When connecting a fixture using an island vent , what must the drainage and piping also be equipped with under a floor? |
Clean out |
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When connecting a fixture using an island vent which code/tables must be used to size the drain and vent? |
2493 2571 |
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What must be done to the lowest point of the vent piping when using an island vent? |
Drained to the fixture drain |
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When is it permissible to install an island vent? |
When there is no direct access to an adjacent wall |
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What is the purpose of a vent stack? |
Limits the pressure differentials in a soil and waste stack |
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How high must a building be before a vent stack is required? |
More than 4 stories with plumbing fixtures |
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Where must a vent stack connect? |
At or below the lowest soil or waste branch connected to the stack |
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What story must a vent stack connect to the soil and waste stack? |
The lowest story served by the stack |
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Where is a bathroom group allowed to be drained into a vent stack? |
Lowest story served by the vent stack. |
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When a bathroom group is connected to a vent stack, is it necessary to connect a fixture to the vertical portion of the vent stack? |
Yes, at least one fixture must be connected to the vertical portion. |
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How many fixture units are allowed to connect to the vent stack? |
Eight fixture units |
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How is a bathroom group sized when tied in to the vent stack? |
As a wet vent |
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What is the purpose of a Yoke vent? |
Relieves excessive air pressures |
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When an offset in a soil or waste stack is greater than 1.5m, how is it sized? |
As a branch or building drain 2.4.10.6. |
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