sanitary drainnage system Flashcards
A system consists of traps at each fixture,
and fixture branch, stack, and drain pipes that
carry wastewater away from the plumbing
fixtures and out of the building.
SANITARY DRAINAGE
sometimes referred to as
the drain, waste, and vent (DWV)
systems
Consists of drainage pipes, vents,
and traps
Removes wastewater and prevents
sewer gases from entering buildings
Gravity-based system for efficient
waste removal
SANITARY DRAINAGE
AND VENT SYSTEM
Gravity is the driving force behind
wastewater flow, so the sanitary drainage
system is known as a______________
gravity system.
Introduces and circulates air in the system to
maintain atmospheric pressure in the drain lines
and ensure adequate gravity flow of
wastewater
VENT SYSTEM
a U-shaped pipe that retains water to block sewer gases
traps
most commonly used traps
P-traps
traps that is Built into the fixture
Integral Trap
traps that is Prohibited due to siphoning
issues
S-Trap & U-Trap
Passive plumbing devices that trap, separate, and
retain unwanted substances
Prevent blockages, backups, and contamination of
wastewater
Prevent solidified grease from coating pipes
Reduce the risk of plumbing blockages and
overflows
·Protect wastewater treatment processes
Improve wastewater treatment efficiency and
reduce costs
INTERCEPTORS
Used in restaurants, cafeterias, and food
service facilities
Prevent grease, fat, and oil from
clogging sewer lines
GREASE INTERCEPTORS
Found in car washes, manufacturing
plants, and vehicle service centers
OIL-SAND INTERCEPTORS
Used in barber shops, beauty salons,
and pet grooming facilities
Capture hair and fibrous materials from
wastewater
Prevents clogs caused by accumulated
hair in plumbing systems
HAIR INTERCEPTORS
Interceptors are sized based on a minimum __-minute peak wastewater detention
time
30
horizontal drain lines connecting plumbing fixtures to the sanitary drainage system
fixture branch
slope should be between__ inch to __ inch per foot
1/8 inch to 1/2
is a vertical pipe that carries wastewater or vent gases from a multiple plumbing fixtures in a building
stack
stack type that carries human waste from toilet
soil stack
type of stack that carries wastewater except human waste
waste stack
stacks Must be supported at __-ft (_-m) intervals to limit
movement
10-ft (3-m)
Horizontal offsets used in stacks over ___ ft (__- m) to
reduce velocity and turbulence
80 ft (24.4 m)
Fixture branches must connect to stacks and building
drains at what angle
45deg
A designated central area in large
buildings for plumbing
Plumbing core
A vertical space for running pipes between
floors
Pipe chase:
main horizontal pipe collecting wastewater from soil and waste stacks
building drains
buuilding drains extends __ to __ft outside the foudnatiion wall
2 to 5ft
slopes of bulding drains ranges from ___ to____ inch per foot
1/16 to 1/2 inch
Ideally, wastewater should not flow by gravity into the
sewer. T or F
F
extension of the building drain
building drain
is the primary pipe that conveys wastewater from building to a treatment plant
sanitary main sewer
sanitary main sewer typically at least ____ in diameter for gravity-based system
8inch
are scew-type fittings with removable caps for accessing the drainage system
cleanouts
cleanouts in horizontal pipese
floor cleanlouts
clean outs in vertical stacks
wall cleanouts
placement for cleanout is no higher than ___ in vertical stacks
48inches
Cleanouts should be no more than __ ft apart, including the developed length of
the cleanout pipe, in horizontal drainage lines of 4 in or less size.
50
Cleanouts should be no more than ___ ft apart, including the developed length of
the cleanout pipe, in horizontal drainage lines of sizes over 4 to 10 in.
100
Cleanouts should not be more than ___ft apart, including the developed length of
the cleanout pipe, in horizontal drainage lines exceeding sizes of 10 in.
150ft
The ____________ is
defined as the installation of a vent pipe
for every trap or trapped fix ture. It is the
easiest method of ensuring the
preservation of a trap seal but the most
costly because of the number of vent
pipes required in the venting system
individual venting technique
The ______________ method serves two
fixtures located on the same floor; it is
essentially an individual vent that serves no
more than two traps or trapped fixtures
common venting
The ____________ method uses a single
vent pipe to provide venting for all of
the fixtures of one or two bathroom
groups that are located on the same
floor.
wet venting
A _________________system is a horizontal venting
pipe serving up to eight fixtures
circuit venting
A _________________ allows
the distance from trap to vent to be extended
infinitely, provided the drain stays in the
horizontal orientation and there is a vent
somewhere within the horizontal branch
combination drain and vent system
A_________________ is a continuous pipe of lesser or
equal diameter running parallel and alongside
the soil and waste stack in a multistory
plumbing system. It is used to equalize air
pressure within the stack
relief vent
is a pressure-activatesd, one-way mechanical venting port used to eliminate the need for expensive venting roof penetration
air admittance valve
A ________________
(PAPA) is a product developed to
protect buildings of 10 or more
stories against the unwanted
positive pressures generated in
the DWV system
positive air pressure attenuator
is a system that combines the
drain stack, branches, and vents into one pipe system
by using patented Sovent fittings.
Sovent system
Refers to the process of using a specialized
pump, called a “sewage ejector pump,
“ to
forcefully push wastewater from a lower level
of a building, like a basement, up to the main
sewer line when gravity alone cannot
effectively drain it.
SEWAGE EJECTION
a sewage ejector can pump solids from __to ___
in (___ to ___ mm) in size or grinds solid wastes
before passing them through the ejector.
2 to 4
in (50 to 100 mm)
Typically, residential ejector systems must
have the capacity of ejecting solids up to ___ in
(___ mm) in size
2 in
(50 mm)
Additionally, these systems are generally
rated to a maximum temperature of 180°F
(82°C).
180°F
(82°C).
-a unit of measurement for the amount of
wastewater a plumbing fixture generates
Drainage Fixture Units
the _____is based on the rate of discharge,
how long the fixture is in use, and how often
it’s used.
DFU
Drainage Pipe Sizes:
Small projects: ____ to ___ inches.
Larger buildings (hotels, apartments, offices):
Require wider walls or furred-out areas for bigger
pipes.
Small projects: 1½ to 4 inches.
Larger buildings (hotels, apartments, offices):
Require wider walls or furred-out areas for bigger
pipes.
Pipes must be placed in the ground before pouring
concrete. T or F
TG
