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Plumbing Part 1 – water systems and pipe material SW Wong MIOP, RP Water Source for Hong Kong Water From Guangdong Main Source Rain Water From Rainwater Collection Area Well Used in Remote Area Flushing Water Source for Hong Kong Sea Water Main Source Fresh Water

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Presentation Transcript
slide1

Plumbing

Part 1 – water systems and pipe material

SW Wong

MIOP, RP

slide2

Water Source for Hong Kong

  • Water From Guangdong
  • Main Source
  • Rain Water
  • From Rainwater Collection Area
  • Well
  • Used in Remote Area
slide3

Flushing Water Source for Hong Kong

  • Sea Water
  • Main Source
  • Fresh Water
  • No sea water supply for some area
  • Well
  • Used in Remote Area
slide4

Water Connection to Plumbing System

Rainwater

Collection

Reservoir

Water from

Guangdong

Distributed

Reservoir

Water

Treatment

Plant

Distributed

Reservoir

Distributed

Reservoir

Consumers

Consumers

Consumers

slide5

Type of Plumbing System

  • -Cold water supply system
  • - Hot water supply system
  • - Surface water drainage above ground
  • Foul water drainage above ground
  • Drainage below ground
slide6

Cold Water Supply System

  • Direct System – water is distributed by means of reservoir head
  • b. Indirect System – water is collected in sump tank and pump
  • to storage tank where water is distributed
  • by gravity.
  • c. Booster Pump System - used in low pressure area.
slide7

Hot Water System

  • Centralised System - water is heated and stored centrally and distributed throughout the building by means of pipeworks.
  • b. Localised Water Heating System - supply of hot water by localised systems use electric or gas water heater sited either directly over the fitting being supplied.
slide8

Surface Drainage Above Ground

Collecting rainwater onto the roof of building and discharging it away to the underground drainage system outside the building.

Foul Drainage Above Ground

Collecting soil, waste, and ventilation pipework and fittings in the building. It functions to convey discharges from appliance to underground drains and can be arranged in three different ways: two-pipes, one-pipe and single-stack systems.

slide9

Drainage Below Ground

  • Separated System is used in Hong Kong
  • Drain – collecting rainwater and discharged to
  • nullah and river.
  • b. Sewer - collecting foul water and discharged to
  • wastewater treatment plant in cities
slide10

Materials for Potable Water Supply

  • Ductile Iron Pipe to BS 4772
  • Copper pipe to BS 2871
  • Polyethylene (PE) pipe to BS 6370 or BS 6572
  • Stainless steel pipe to BS 4127
  • PB pipe to BS 7291 Pt 1 & 2
  • Lined (uPVC / Polyethylene lining) GI Pipe – approved type
  • PEX pipe to BS7291 Pt 1 & 3
slide11

Pipe Material for Flushing Water Supply

  • Cast Iron Pipe to BS 4622
  • uPVC pipe to BS 3505 Class D & E
  • PVC-C (Chlorinated) Pipe to BS 7291 Pt. 1 & 4
  • Ductile Iron Pipe to BS 4772 (cement lining)
slide12

Pipe Material for Drainage Above Ground

  • Cast Iron Pipe to BS 416
  • uPVC pipe to BS 4514 / BS 5255 / AS 1415
  • Pipe Material for Drainage Below Ground
  • Cast Iron Pipe to BS 437 / BS 1211
  • Concrete Pipe
  • French Red Pipe
  • Vitrified Clay Pipe