01 water supply
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o drinking
o cooking
o personal ablution
o washing clothes
o flushing toilets
o swimming pools
o gardening
o for ornamental pools, fountains ,cascades etc.
o laboratories
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The average daily water requirements of water (for bathing, cooling, washing and toil
standards code of practice for water supply are:
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Digitally signed by www.archidude.com
DN: cn=www.archidude.com, o=www.archidude.com,
ou=www.archidude.com, [email protected], c=IN
Date: 2012.01.22 19:49:38 -08'00'
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)
Hours of supply
Pressure in the mains
Demand attern in the buildin
Fire storage requirements.
TYPES OF STORAGE:
Overhead storage:
It is mandatory for flushing of toilets
Underground storage:
These are necessary to collect water from the city mains duringhours of water supply if the pressure is not enough to reach topoint of supply.
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DIRECT SUPPLY: ater s supp e to a parts o t e
building directly from the city
mains through a connection and a
.
The system is successful only when
the water supply is available in
round the clock. The no of floors to which water can
limited by the pressure of the water.
The system eliminates the need for storage tanks which are sources of
contamination.
,
etc.
OVERHEAD TANK SUPPLY SYSTEM :
Used in cities where the pressureis sufficient for water to reach uto 4 to 5 floors or higher but onlyfor limited hours.
To meet the water requirementduring non supply hours, water isstored in overhead tanks placedon the terrace which are filled bya direct connection from themains.
Supply to kitchen is taken fromthe direct main while supply totaps or at ng an or us ngis taken from the overhead tank
PUMPED SYSTEMS Water can be distributed by an
automatic pumping system(hydro pneumatic system)direct l to the su l oint,similar to direct supply.
The pressure in the system isoos e y pump ng se s a
pump water from anunderground/ground level tank.
ADVANTAGE
The main advantage of such asystem is that it eliminates the
for existing buildings or inbuildings where new overhead
tanks can not be constructed, or
placed on roofs cannot generateenough pressure
UNDERGROUND/OVERHEAD TANK SYSTEM
ty supp y av ng ow pressureall the time require storage ofwater at ground level
ater or u ng s co ecte ntanks which fill up despite low
pressure in the mains. It is then pumped to overhead
tanks
Direct supply for drinkingpurposes is provided up to afloor height permitted byavailable pressure.
Tall buildings have to dependonly on pumped supply fromunderground tank /overhead tanksystem an ave to use samewater for drinking.
BUILDINGS
This method issimilar to overhead
/ underground tank
building is dividedinto zones.
An overhead tank isplaced for each
water to all thefloors of that zone.
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OTHER SYSTEMS
Many new pumping
developed for special
application and
usages. Modern system
include:
Variable speed pumping
system
high pressure system
DIVISION OF OH TANK
Flushing 2/3 capacity Domestic 1/3 capacity
DETERMINATION OF STORAGE TANKS CAPACITY
A person requires 135 to 225 liters of water per day dependi
on his standard of living.POWER FAILURE PRONE ZONES
Capacity of UG tank Total liters required/day x 2 Capacity of OH tank Total liters required/day x1
POWER FAILURE FREE ZONE
Capacity of UG tank Total liters required/day x 1
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From the ring of
domestic pipe, the
pipes are taken down
for kitchen and bath
se aratel or
combined) and
separate pipes from
r ng or eac separate
floor. From the ring
of flushing, pipes are
taken down for WC
and separate pipe
separate floor.
DOMESTIC PIPE is
at a height of about 1 m
to the last connection of
washin fixtures..
If fixtures are on both
walls, then another pipe
a height of 1 m to the
other wall.
be coated with tar over
the covering of plastic to
corrosion