Ventilation System Flashcards
pipes installed to provide flow of air to or from a drainage system
VENT SYSTEM
a pipe or opening used for ensuring the circulation of air in a plumbing system
VENT PIPE
principal artery of the venting system. It is that portion of the vent pipe system serving as terminal for the smaller forms of individual and grouped fixture trap ventilation, sometimes referred to as Collecting Vent Line
MAIN VENT
the horizontal wet venting of one or more sinks or floor drains by means of a common horizontal waste and vent pipe, adequately sized to provide free movement of air above the flow line of the drain.
COMBINATION WASTE AND VENT SYSTEM
that a portion of a vent pipe there wastewater also flows through
WET VENT
A pipe that does not carry liquids or water-borne wastes
DRY VENT
a horizontal vent connecting one or more individual vertical back vents with the vent stack or stack vent
BRANCH VENT
a branch vent for 2 or more traps
GROUP VENT
unit vent or dual vent
COMMON VENT
one vent pipe will serve 2 traps
UNIT VENT/DUAL VENT/COMMON VENT
a group vent pipe that connects to the vent stack
CIRCUIT VENT
vertical vent connection on a horizontal soil or waste pipe branch at a point downstream of the last fixture
LOOP OR CIRCUIT VENT
vertical vent connection on a horizontal soil or waste pipe branch at a point downstream of the last fixture that connects to stack vent
LOOP VENT
vertical vent connection on a horizontal soil or waste pipe branch at a point downstream of the last fixture that connects to vent stack
CIRCUIT VENT
a vertical vent that is a continuation of the drain to which the vent connects
CONTINUOUS VENT
Provides additional circulation of air between the drainage and vent systems. This type of vent is installed to ventilate the soil and waste pipe and the connecting branches rather than the fixture trap.
RELIEF VENT
a pipe connecting upward from a soil or waste stack below the floor and below horizontal connection to an adjacent vent stack. Sometimes referred to as by-pass ventilation
YOKE VENT
Backvent pipe
REVENT PIPE
the extension of a soil or waste stack above the highest horizontal drain
STACK VENT
the vertical vent pipe installed primarily for providing circulation of air
VENT STACK
vents a fixture trap and connects above the fixture served or terminates to open air
INDIVIDUAL VENT
connects directly with an individual trap underneath or behind the fixture
BACKVENT PIPE
a pipe or shaft to convey foul air from a plumbing fixture or a room to the outer air
LOCAL VENT
What is the minimum height of galvanized wrought iron or galvanized steel above ground?
15 cm
What are the two of of determinants of vent pipe size?
length
total number of fixture units
what is the minimum size of vent?
32 mm or 1/2 diameter of drain being served
what is the allowable increase in the length of horizontal portion of vent as long as the pipe is increased one pipe size larger?
1/3
What is the minimum rise of each vent above the highest flood level rim before offsetting horizontally to join the sent stack or stack vent
152 mm
How many fixtures may be served by a common vertical vent pipe when they discharge into an approved double branch fitting with inlet openings at the same level?
2 fixtures
How much is the extension of vent pipe above the roof?
0.15 m
What is the clearance of vent pipe through roof away from any vertical surface nearby?
0.30m
What is the horizontal distance of vent opening from any openable window, door opening, air intake or vent shaft?
3 m
What is the vertical distance above vent opening from any openable window, door opening, air intake or vent shaft?
0.9 m
What is the horizontal distance of vent opening away from lot line, alley, and street boundary lines?
0.9 m
what is the height extension of vent pipe above roof or fire wall?
0.15 m
what is the horizontal distance of vertical vent pipes for outdoor installations to any part of roof that is used for other purposes?
3 m
what is the vertical distance of vertical vent pipes for outdoor installations to any part of roof that is used for other purposes?
2.1 m
__________ is prohibited except where roof is used for purposes other than weather protection (for vents)
Flagpoling of vents
How many stories above the bldg drain shall be served by a parallel vent stack?
10 or more
Where should we provide yoke vents?
Every 5th flr levels
What is the size of yoke vent?
equal to soil stack on vent stack (whichever is smaller
What is the distance of yoke vent connection with the vent stack above floor level?
1 m
What fitting/branch is used to connect a yoke vent with drainage stack?
wye branch
Wet venting is limited to vertical drainage piping receiving the discharge from tap arm of _____ fixture unit
1-2 FU
What is the maximum number of fixture that a fixture serving as a vent can carry?
4 fixtures
Wet-vented fixtures shall be located on ______
Same floor level
The vertical piping between two consecutive inlet levels shall be considered a _____
Wet-vented section
What is the minimum wet vent pipe size?
51 mm
What type of fitting is used for venting system of island sinks?
Return bend
The return bend for venting system of island sinks shall be a one piece fitting or an assembly of _____
45° elbows
What is the minimum size for waste pipe and trap of CW&VS??
2 pipe sizes larger than fixture tailpiece
No vertical waste pipe shall be used in any ______
CW & VS
What are approved vent pipe materials?
Cast iron
Ductile cast iron
Galvanized wrought iron
Galvanized steel
Lead
Copper
Brass
Schedule 40 ABS DWV
Series 1000 PVC DWV
What are approved vent fitting materials?
Cast iron
Galvanized malleable iron or steel
Lead
Copper
Brass
ABS
PVC
How much is the atmospheric pressure at sea level?
65.47 Newtons
Type of ventilation that only serves the fixture trap indirectly, their main function is to maintain the balance atmospheric pressure inside the waste pipe system
RELIEF and YOKE VENT
This type of vent is installed at the base of the soil stack to ventilate the soil and waste pipe
RELIEF VENT
Type of ventilation used in fixtures in a room away from partitions considered not practical but sometimes tolerated only when other methods of ventilation could not be possible
LOOPED VENT
The traditional installation practice adopted year after year which serve water closets and several fixtures only
ONE LINE PIPING
Installation practice which is universally accepted for years and has proven as an efficient plumbing system sometimes referred to as DWV
DOUBLE LINE DRAINAGE SYSTEM
TWO LINE DRAINAGE SYSTEM
TRADITIONAL TWO LINE DRAINAGE SYSTEM
A recent development in drainage installation suitable for tall buildings which completely eliminates the vent stack and other forms of ventilation but still attain the desired functions and effectiveness
SOVENT SYSTEM
Refers to the downward force within the drainage system
PLUS PRESSURE
Refers to the suction force that was siphon and pull down the water seal of the fixtures
MINUS PRESSURE
Installed within the sovent system which spatters or scatters the effluent in drops or small blobs and mixed with the air forming a rarefied mixture of air and liquid
AERATOR
Installed within the sovent system designed to overcome tendency of the falling waste to stock up excessive back pressure at the bottom of the stack when the flow is decelerated by the band into the horizontal drain
DEAERATOR
Installed within the sovent system which serves as terminal of the soil branch in each floor
AERATOR
Installed within the sovent system at the bottom portion of the soil stack where the house drain is connected to receive discharge from the aerator
DEAERATOR
Refers to the use of aerator and deaerator fittings incorporated into the ordinary plumbing pipe installations
SOVENT SYSTEM
Type of chimney made of brick or block and require lining for proper safety
MASONRY CHIMNEY
Type of chimney often referred to as Class A chimney which has stainless steel interior and galvanized or stainless steel exterior
Factory-Built chimney
