Cold water supply system & Components

inclusive of sources, importance of cold water supply system and component in system

1. Unit -2
BUILDING SERVICES –I

2. SOURCES OF WATER:
SURFACE SOURCES:
1.Streams
2.Lakes
3.Ponds
4.Rivers
5.Reservoirs
6.Stored rain water and
cisterns
GROUND SOURCES:
1.Springs
2.Wells

3. DISTRIBUTION SYSTEM:
Pressureinpipelineisnecessary,whichshouldforcethewater
toreachateveryplace.
Distribution system are
classified as :-
Forefficientdistributionitisrequiredthatwatershouldreachto
everyconsumerwithrequiredrateofflow.
Pumping
System
Gravity
System
Dual
System

4. GRAVITY SYSTEM
•Whensomelake,river,reservoirsufficientlyhighabovethe
cityareaisavailable.
•Waterflowsinmainsduetogravitationalpull,nopumping
isrequired.

5. PUMPING SYSTEM
•Pressure maintained in the pipe line is by pump
•Water is directly pumped in the mains
•Number of pumps are required to work at different time & pressure rate in
a day
•If power fails the whole supply will be stopped
Pressure
Water Mains

6. DUAL SYSTEM
•whenlesswaterdemand-waterisstoredinelevatedreservoir
•Withincreaseinwaterdemand–watercomesfrombothpumping
stationaswellasreservoir
•During power failure and fire fighting
water stored in reservoir can be used
•Alsoknown as
combinedgravityand
pumpingsystem.
•Pumpisconnectedtothemainsaswellastotheelevatedreservoir
•More reliable and economic
•Require uniform rate of pumping

7. PLUMBING
•referstoasystemofpipesandfixturesinstalledinabuildingforthe
distributionofpotablewaterandtheremovalofwaterbornewastes.
•Istheartandtechniqueofinstallingpipes,fixtures&other
apparatusesinbuildings&forbringingthewatersupply,liquids,&
removingthem;
•fromtheLatinplumbumforleadaspipeswereoncemadefromlead.

8. •Also fuel gas piping; water heaters and ventsfor same.
PLUMBING SYSTEM
DRAINAGE PIPESUPPLY PIPE FIXTURE
•System includes all potable water supply and distribution pipes, all
plumbing fixturesand traps;
•all sanitaryand storm drainage systems; eg. roof drains and down
spouts
•and all building drainsand sewers, including the joints and connections

9. PLUMBING CYLE

10. Water Supply and Distribution System
Definition
•Carrieswaterfromthewatersource,streetmainortothebuildingandto
variouspointsinthebuildingatwhichwaterisused.
Water Supply Systems
•Hot water system
•Cold water system
Cold water system :
•Cold water system provide water for the following purposes.
▫Drinking purpose
▫Cooking purpose
▫Sanitary purpose
▫Washing purpose
▫Gardening

11. Types Of Cold Water System
Two Types
1.Direct system
2.Indirect system
Direct Water Supply System
•Water is supplied direct from
mains to fixtures
Indirect Water Supply
System
•Watergoingtooverhead
tankandthenthewateris
suppliedtodifferentfloors
bygravity

12. –FreshDrinkingwatermaybeobtainedatany
point
Advantages:
–Ifthereisamainsburstthereisnostoreofwater
Disadvantages:
Direct Water Supply System
–savinginpipeworkespeciallyinmultistory
buildings.
–Thisisduetocoldwaterdistributionpipefrom
thecisternbeingomitted
–Thereisadangeroffoulwaterfromthesanitaryfittingsbeing
siphonedbackintothemainwater
–Duringpeakperiodsthereisatendencyfortheloweringofpressure

13. –Incaseofaninterruptioninthemains
supplythereisanadequatestoreof
water
Advantages:
–FreshDrinkingwaterisonlyavailableatthekitchensink(orsingle
point)
Disadvantages:
Indirect Water Supply System
–Thereisnoriskofbacksiphonage
withthissystem
–Thereisnotendencyofpipeburstingdue
tothelowpressureinthepipework
–Longerpiperunsarerequired
–Alargerstoragecisternisnecessary

14. PARTS OF WATER DISTRIBUTION SYSTEM
SERVICE PIPE
Thepipefromthewatermainorothersourceofpotablewatersupplytothe
waterdistributionsystemofthebuildingserved.
DISTRIBUTION PIPE/ SUPPLY PIPE
Apipewithinthestructureoronthepremiseswhichconveyswaterfromthe
waterservicepipetothepointofutilization.
RISER
Awatersupplypipethatextendsonefullstoryormoretoconveywaterto
branchesortoagroupoffixtures.
FIXTURE BRANCH
Thewatersupplypipebetweenthefixturesupplypipe&thewaterdistributing
pipe.
FIXTURE SUPPLY
A water supply pipe connecting the fixture with the fixture branch.

15. SERVICE PIPE
DISTRIBUTION PIPE/ SUPPLY PIPE
RISER
FIXTURE BRANCH
FIXTURE SUPPLY

16. TYPES OF
FITTINGS/PLUMBING
FIXTURES IN BRIEF

17. TYPES OF PIPES:
1.Plastic pipes:
a.LDPE (Low Density polyethylene)
b.HDPE (High Density polyethylene)
c.PVC
2.Galvanised iron (GI) pipes
3.Asbestos Pipes
4.Cast iron (CI) Pipes
5.RCC Spun pipes
6.Copper pipes

18. PLASTIC PIPES
LDPE PIPES
HDPE PIPES
PVC PIPES

19. GALVANISED IRON (G. I .
PIPES)

20. CAST IRON PIPES RCC SPUN PIPES
COPPER PIPES

21. LEAD
PIPES

22. JOINTS

23. JOINTS

24. •Valves are the devices used for controlling the
flow of liquid in a pipe line.
•With the use of Valve any section of pipe line
can be isolated for the purpose of inspection,
repairs etc.
•Different types of valves are:
1.LINE VALVES -Sluice Valves
-Globe Valves
2.SCOUR VALVES
3.AIR VALVES
4.RELIEF VALVES
5.REFLUX VALVES
6.FLOAT VALVES
7. FIRE HYDRANTS
VALVES
8.TAPS & STOP COCKS

25. GLOBE VALVE
SLUICE VALVE

26. AIR VALVE
FLOAT
LEVER
RELIEF VALVE
FLOAT VALVE

27. GATE VALVE

28. TAP OR BIB COCK
•Taps are provided at the ends of the
water pipe to draw-off water from the
pipe.
•It is normally a screw down type &
opens in an anticlockwise direction.
•The bib cock may be a push type
which operates automatically &
normally used in public places.

29. STOP COCK

30. STOP TAP