PART 1 Flashcards
pipes installed to provide flow of air to or
from a drainage system or to provide a circulation of air
within such system to protect traps seals from siphonage and
backpressure
Vent system
principal artery of the venting
system
Main vent ( vent stack )
vertical vent pipe installed primarily for
providing a circulation of air
Vent stack
the extension of a soil or waste stack above
the highest horizontal drain connected to the stack (SVTR)
Stack vent
Two Principal Classifications of Vents
Stack vent.
Vent stack
the extension of a soil or
waste stack above the highest
horizontal drain connected to the
stack (SVTR)
Stack vent
principal artery, vertical vent pipe;
“relief” and “yoke” vents; tributary;
collecting vent line; relieves any
back-pressure
Vent stack
that portion of a
vent pipe through wastewater also
flows through
Wet vent
a vent that does not
carry liquid or water-borne wastes
Dry vent
a horizontal
vent pipe connecting from a
_____of the drainage system to
a vent stack or stack vent
Branch vent
a branch vent
Group vent
a pipe or opening used
for ensuring the circulation of air in a
plumbing system; for reducing the
pressure exerted on trap seals
Vent pipe
connects directly
with an individual trap underneath or
behind the fixture
Backvent pipe
serves a single
trap
Individual vent
(UNIT
VENT/DUAL VENT)
COMMON VENT
(UNIT VENT)
DUAL VENT
an arrangement
of venting so installed that one
vent pipe will serve two traps
Unit vent
group vent from
in front of the last fixture/connects
to vent stack (LOOP VENT)
Circuit vent
(extension is usually vertical
immediately beyond its connection
to the soil or waste pipe);
connected to the stack vent
Loop or circuit vent
auxiliary vent
(“yoke vent”)
Relief vent
connecting
upward from a soil or waste
stack below the floor and below
horizontal connection to an
adjacent vent stack
Yoke vent
used on
fixtures located in the room
away from partitions that might
be utilized to conceal the waste
and vent.
Loop vent
horizontal wet venting of one or more
sinks/floor drains by a common horizontal
waste and vent pipe
COMBINATION WASTE AND VENT SYSTEM
drain connecting
the compartments of a set of fixtures to a trap
or connecting other permitted fixtures to a
common trap
Continuous waste
pipe or shaft to
convey foul air from a fixture or room
to the outer air
Local vent
underground
Utility vent
- a fitting or device so
constructed as to prevent the
passage of air, gas
Traps
vertical distance between
the dip and the crown weir of a
trap/the water in the trap between
the dip and the crown weir
Seal
maximum vertical depth of liquid
that a trap will retain, measured
within the crown weir and the top of
the dip of the trap
Trap seal
fitting shaped like the “S”
DOUBLE-BEND FITTING
that portion of a fixture drain between a
trap and the ven
Trap arm
physical separation into
indirect waste receptor from fixture,
device indirectly connected
AIR BREAK
unobstructed
vertical distance between the lowest
opening from any pipe to the flood
level rim of the receptor
AIR GAP, DRAINAGE
unobstructed vertical distance through
free atmosphere between the lowest
opening from any pipe or faucet
conveying potable water to the flood-
level rim
AIR GAP, WATER DISTRIBUTION
a
waste pipe that does not connect
directly with the building drainage
INDIRECT WASTE PIPE
legal traps
S trap, bell trap, drum trap, crown vented trap
intercept or to
separate, and prevent the passage of oil,
grease, sand
clarifier
interceptor of 3 cubic meters
grease interceptor
retain grease from 1 - 4
fixtures (maximum)
grease trap
(INTERCEPTOR)
sand interceptor
