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Cold water supply system & Components

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

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Cold water supply system & Components

  1. 1. Unit - 2 BUILDING SERVICES – I
  2. 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. 3. DISTRIBUTION SYSTEM: Pressure in pipe line is necessary, which should force the water to reach at every place. Distribution system are classified as :- For efficient distribution it is required that water should reach to every consumer with required rate of flow. Pumping System Gravity System Dual System
  4. 4. GRAVITY SYSTEM •When some lake, river, reservoir sufficiently high above the city area is available. •Water flows in mains due to gravitational pull, no pumping is required.
  5. 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. 6. DUAL SYSTEM •when less water demand - water is stored in elevated reservoir •With increase in water demand – water comes from both pumping station as well as reservoir •During power failure and fire fighting water stored in reservoir can be used •Also known as combined gravity and pumping system. •Pump is connected to the mains as well as to the elevated reservoir •More reliable and economic •Require uniform rate of pumping
  7. 7. PLUMBING •refers to a system of pipes and fixtures installed in a building for the distribution of potable water and the removal of waterborne wastes. •Is the art and technique of installing pipes, fixtures & other apparatuses in buildings & for bringing the water supply, liquids, & removing them; •from the Latin plumbum for lead as pipes were once made from lead.
  8. 8. •Also fuel gas piping; water heaters and vents for same. PLUMBING SYSTEM DRAINAGE PIPESUPPLY PIPE FIXTURE •System includes all potable water supply and distribution pipes, all plumbing fixtures and traps; •all sanitary and storm drainage systems; eg. roof drains and down spouts •and all building drains and sewers, including the joints and connections
  9. 9. PLUMBING CYLE
  10. 10. Water Supply and Distribution System Definition •Carries water from the water source, street main or to the building and to various points in the building at which water is used. 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. 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 •Water going to overhead tank and then the water is supplied to different floors by gravity
  12. 12. – Fresh Drinking water may be obtained at any point Advantages: – If there is a mains burst there is no store of water Disadvantages: Direct Water Supply System – saving in pipe work especially in multistory buildings. – This is due to cold water distribution pipe from the cistern being omitted – There is a danger of foul water from the sanitary fittings being siphoned back into the main water – During peak periods there is a tendency for the lowering of pressure
  13. 13. – In case of an interruption in the mains supply there is an adequate store of water Advantages: – Fresh Drinking water is only available at the kitchen sink (or single point) Disadvantages: Indirect Water Supply System – There is no risk of back siphon age with this system – There is no tendency of pipe bursting due to the low pressure in the pipe work – Longer pipe runs are required – A larger storage cistern is necessary
  14. 14. PARTS OF WATER DISTRIBUTION SYSTEM SERVICE PIPE The pipe from the water main or other source of potable water supply to the water distribution system of the building served. DISTRIBUTION PIPE/ SUPPLY PIPE A pipe within the structure or on the premises which conveys water from the water service pipe to the point of utilization. RISER A water supply pipe that extends one full story or more to convey water to branches or to a group of fixtures. FIXTURE BRANCH The water supply pipe between the fixture supply pipe & the water distributing pipe. FIXTURE SUPPLY A water supply pipe connecting the fixture with the fixture branch.
  15. 15. SERVICE PIPE DISTRIBUTION PIPE/ SUPPLY PIPE RISER FIXTURE BRANCH FIXTURE SUPPLY
  16. 16. TYPES OF FITTINGS/PLUMBING FIXTURES IN BRIEF
  17. 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. 18. PLASTIC PIPES LDPE PIPES HDPE PIPES PVC PIPES
  19. 19. GALVANISED IRON (G. I . PIPES)
  20. 20. CAST IRON PIPES RCC SPUN PIPES COPPER PIPES
  21. 21. LEAD PIPES
  22. 22. JOINTS
  23. 23. JOINTS
  24. 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. 25. GLOBE VALVE SLUICE VALVE
  26. 26. AIR VALVE FLOAT LEVER RELIEF VALVE FLOAT VALVE
  27. 27. GATE VALVE
  28. 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. 29. STOP COCK
  30. 30. STOP TAP

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