BUILDING WATER SUPPLY SYSTEM AND DESIGN Flashcards
____________ require that a potable water
supply be adequately furnished to all
plumbing fixtures.
Plumbing codes
carries
cold and hot water through distribution
pipes and delivers it to the plumbing fixtures.
water supply system
Also known as water service, which is a
large water supply pipe that carries potable
water or other water source from the
district or city water system to the building.
BUILDING SUPPLY
Required by most district water supply
systems to measure and record the amount
of water used.
WATER METER
A large pipe, serving as the principal artery
of the water supply system. It carries water
through the building to the furthest riser.
BUILDING MAIN
A water supply pipe that extends vertically
in the building at least one story and carries
water to fixture branches.
RISER
A water supply pipe that runs from the riser
or main to the fixture being connected. It is
any part of a piping system other than a
riser or main pipe.
FIXTURE BRANCH
It runs from the fixture branch to the fixture,
the terminal point of use in a plumbing
system. A shut-off valve is typically located
in the hot and cold water supply at the
fixture connection.
FIXTURE CONNECTION
Hot and cold pipes should be spaced at least ___ in
(____ mm) apart or have insulation placed between
them to prevent heat interchange.
6 in
(150 mm)
A branch supplying water to two or more fixtures is
called a____
zone.
Fixtures are typically
located in clusters called _______.
groups
There are times when the width of a wall needs to be
increased to allow for pipes running horizontally to
pass by drainage pipes (or other pipes) running
vertically. These walls of increased thickness are
called______________.
plumbing walls
it is where Hot and cold water distribution pipes are installed
parallel to one another, conveying hot and cold water
to risers and branch pipes. Running pipes parallel with
building walls and floors arrange pipes in an
organized manner.
RIGID-PIPE DISTRIBUTION CONFIGURATION
This system consists of a plastic or metal plumbing
manifold and flexible plastic piping. The manifold
serves as a common location from which all the
plumbing fixtures are supplied.
HOMERUN (MANIFOLD) DISTRIBUTION CONFIGURATION
Manifolds have two separate chambers: the ____________
water chamber is supplied from the main water supply
line and the ________ water chamber is fed from the water
heater.
cold
water chamber is supplied from the main water supply
line and the hot water chamber is fed from the water
heater.
Water pressure from the water supply main is relied on
to drive water flow through the system.
UPFEED AND DOWNFEED DISTRIBUTION
plays a vital role in the
development and functioning of systems that deal
with fluid movement, like plumbing, heating, cooling,
and hydraulic systems.
Water pressure
When the forces acting on a fluid are uneven, the molecules within
the fluid move in the direction of the _________
net force.
is a
force exerted by the
weight of the fluid
against the walls of a
vessel containing the
fluid
HYDROSTATIC FORCE
IS
THE FORCE EXERTED
BY WATER IN A
PLUMBING SYSTEM.
WATER
PRESSURE
IN PLUMBING WATER
SUPPLY PIPING, THE
MAXIMUM WATER
VELOCITY IS TYPICALLY
RESTRICTED TO __TO __
F/S (__TO__ M/S)
5 TO 10
F/S (1.5 TO 3 M/S)
MAXIMUM SAFE
VELOCITY FOR
THERMOPLASTIC PIPE IS
ABOUT__ FT/S (___M/S)
5 FT/S (1.5 M/S)
THIS HAPPENS WHEN A
LIQUID UNDERGOES A
SHARP DROP IN
PRESSURE, CAUSING
THE LIQUID TO
VAPORIZE INTO TINY
VAPOR BUBBLES
CAVITATION
the vertical distance through
open air between an opening in a
faucet conveying potable water
to the flood level rim of a tank
AIR GAP
IT IS WATER FLOWING
IN THE OPPOSITE
DIRECTION FROM
NORMAL FLOW
BACKFLOW
backflow caused by a
negative pressure (vacuum)
in a potable water system
BACKPRESSURE OR
BACK SIPHONING
caused by a down stream
pressure that is greater than
the supply pressure
BACKPRESSURE
BACKFLOW
caused by a down stream
pressure that is greater than
the supply pressure
ATMOSPHERIC VACUUM
BREAKER (AVB)
a device or plumbing
assembly that when properly
installed in a plumbing
system prevents backflow
VACUUM BREAKER
contains a spring loaded
poppet, must be installed on
the main line leading to the
control valves
PRESSURE VACUUM
BREAKER (PVB)
consists of two check
valves assembled in series
usually with a ball valve or
gate valve installed at each
end for isolation and testing
DOUBLE CHECK
ASSEMBLY (DCA
LARGE INCREASE IN
PRESSURE RESULTED BY
THE SUDDEN CLOSING
OF A VALVE THAT
CAUSED FAST-FLOWING
WATER TO STOP
QUICKLY
WATER
HAMMER
EXPANSION FROM TEMPERATURE
INCREASES CAN PUSH A PIPE
THROUGH A WALL OR CAUSE IT TO
BURST
THERMAL
EXPANSION
consists a slip pipe and a
flange, which is bolted to an
adjoining pipe
SLIP EXPANSION JOINT
able to absorb a certain
amount of end movement
of the pipe
CORRUGATED
EXPANSION JOINT
APPLIED TO THE OUTER
WALLS OF PIPING TO
REDUCE HEAT LOSS OR
PREVENT
CONDENSATION ON THE
OUTSIDE PIPE WALLS
PIPE
INSULATION
refers to the total
amount of water required for a specific
purpose or area over a given period,
influenced by factors such as
population, fixture usage, climate, and
time of day
WATER DEMANd
developed by Dr. Roy Hunter, is used to
estimate the design load of plumbing systems by assigning water
supply fixture unit (WSFU) values to different fixtures based on their
flow rates
fixture unit method,
can be used
to establish meter and distribution pipe size based on the total demand
WSFU DESIGN
TABLE METHOD
