Technical Requirements for Plumbing Works in …...FIG. 6C G17-267_04_rev1.dwg A4 210x297 SCHEMATIC...

$Page 1: Technical Requirements for Plumbing Works in …...FIG. 6C G17-267_04_rev1.dwg A4 210x297 SCHEMATIC LAYOUT OF HYDRO-VENT RE-CIRCULATION SYSTEM \ 匀䠀䔀䔀吀伀䘀尩 O.F. FROM$




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A4 210x297

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METER SIZE (mm)

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15

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25

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40

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%%uDIMENSION (mm)

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A

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200

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370

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421

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METER SIZE (mm)

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50

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80

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100

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%%uDIMENSION (mm)

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A

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310

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413

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483

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150

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500

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CLEAR EFFECTIVE LENGTH

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OF DISTANCE PIECE

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CLEAR EFFECTIVE LENGTH

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OF DISTANCE PIECE

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%%uMETER DIMENSIONS

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FIG. 4

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NON-AMR

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METERS

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AMR METERS

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200

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311

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346




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FIG. 6A

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G17-267_01_rev1.dwg

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SCHEMATIC DIAGRAM FOR CLEANSING (TYPE I)

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CLEANSING TAP UNDER LOCK AND KEY

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INLET

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O.F.

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M


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FIG. 6C

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G17-267_04_rev1.dwg

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A4 210x297

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SCHEMATIC LAYOUT OF HYDRO-VENT RE-CIRCULATION SYSTEM (SHEET 1 OF 2)

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O.F.

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FROM METERED WATER SUPPLY

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WATER TANK FOR HYDRO VENT

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HYDRO VENT


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FIG. 6D

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SCHEMATIC LAYOUT OF HYDRO-VENT RE-CIRCULATION SYSTEM (SHEET 2 OF 2)

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TO NEAREST

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DRAIN

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BY-PASS STOP VALVE

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WATER RETURN

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DETERGENT BOX DETERGENT TYPE : DIVERSEY VOLUME USED : 0.005 LITRE/NOZZLE/HR.

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DISCHARGE PRESSURE GAUGE W/ LOW PRESSURE ALARM OPERATING PRESSURE : ~1.5KG/CM2 SWITCH SET MINIMUM PRESSURE TO 0.5KG/CM2

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VENT-WASH

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EXHAUST HOOD

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PUMP W/ INTERLOCK TO EXHAUST SYSTEM

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STRAINER /FILTER

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REFERENCE ONLY AND THE DETAIL ARRANGEMENT SHALL BE SUBJECTED TO INDIVIDUAL DESIGN

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SOLENOID VALVE




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ELECTRIC HEATING ELEMENT

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%%USECTION THROUGH A CISTERN TYPE WATER HEATER / DISPENSER

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DIRECT MAINS SUPPLY

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INTERNAL VENT PIPE

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COLD WATER FEED

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%%ULAYOUT OF A CISTERN TYPE WATER HEATER / DISPENSER

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O.F.

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H

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O.F.

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%%uCISTERN TYPE WATER HEATER

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FIG. 8

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FIG. 9

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%%uCONNECTED DIRECTLY TO MAINS SUPPLY

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G

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%%uINSTANTANEOUS GAS WATER HEATER

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%%uCONNECTED INDIRECTLY TO MAINS SUPPLY

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O.F.

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G


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COMBINED TEMPERATURE

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AND PRESSURE RELIEF

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VALVE (OPTION 2)

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ELECTRIC HEATING

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ELEMENT WITH

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THERMOSTATIC

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AND THERMAL

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CUT-OUT

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TEMPERATURE

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RELIEF VALVE

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(OPTION 1)

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PRESSURE

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RELIEF VALVE

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(OPTION 1)

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DIRECT WATER SUPPLY

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H

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%%uNOTES :

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2.

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3.

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THE SAFETY DEVICES ARE UNDER THE CONTROL OF THE ELECTRICAL PRODUCTS (SAFETY)

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REGULATION ADMINISTERED BY THE ELECTRICAL AND MECHANICAL SERVICES DEPARTMENT.

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EXPANSION VESSEL IS ONLY REQUIRED WHEN A NON-RETURN VALVE OR A PRESSURE

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4.

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REDUCING VALVE OF THE NON-BACKFLOW TYPE IS FITTED IN THE COLD WATER INLET.

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%%uLAYOUT OF UNVENTED ELECTRIC THERMAL STORAGE TYPE WATER HEATER

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%%uLEGEND :

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OPTIONAL

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A COMBINED TEMPERATURE AND PRESSURE RELIEF VALVE (OPTION 2) MAY BE USED

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IN LIEU OF A TEMPERATURE RELIEF VALVE AND A PRESSURE RELIEF VALVE (OPTION 1).

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THE FACTORY TEST PRESSURE OF THE HEATER SHALL BE IN EXCESS OF 1.5 TIMES

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1.

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THE MAXIMUM STATIC PRESSURE AT THE MAINS WATER SUPPLY POINT.

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EXPANSION VESSEL

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FIG. 10

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IMMERSION HEATER WITH

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SWITCH FOR 'SINK' OR

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'BATH'

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THERMOSTAT

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INSULATION

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OPEN VENT PIPE

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%%uTHERMAL STORAGE WATER HEATER

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%%uLAYOUT OF A PRESSURE TYPE THERMAL STORAGE WATER HEATER

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VH

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INLET

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OPEN VENT PIPE

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TO DRAW OFFS

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O.F.

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%%uESSENTIAL COMPONENTS OF A PRESSURE TYPE

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%%uPRESSURE TYPE THERMAL STORAGE WATER HEATER

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%%uNOTE:

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THIS TYPE OF HEATER SHALL BE SUPPLIED FROM A STORAGE CISTERN, EXCEPT IT IS

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INSTALLED IN FLATS SUPPLIED THROUGH THE INDIRECT OR SUMP AND PUMP SYSTEM.

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FIG. 11

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%%uDIRECT CENTRALISED HOT WATER SYSTEM

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INLET

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O.F.

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H

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H

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B

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COLD WATER STORAGE

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COLD FEED

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OPEN VENT PIPE

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HOT WATER

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DISTRIBUTING

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PIPE

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HOT WATER

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CYLINDER

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SECONDARY

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RETURN

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FLOW PIPE

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RETURN PIPE

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SCREW PLUG

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WITH A

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REMOVABLE

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KEY

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SAFETY

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VALVE

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BOILER

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FIG. 12

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PRIMARY RETURN

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ANNULAR

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HEATER

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FLOW

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RETURN

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OPEN VENT PIPE

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SECONDARY FLOW

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SECONDARY RETURN

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PRIMARY FLOW

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%%uESSENTIAL COMPONENT OF A CALORIFIER

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%%uINDIRECT CENTRALISED HOT WATER SYSTEM

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O.F.

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O.F.

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H

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H

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B

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FEED AND

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EXPANSION

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INLET

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CISTERN

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COLD FEEDS

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CALORIFIER

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(SEE INSET)

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SCREWED

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PLUG WITH A

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REMOVABLE KEY

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BOILER

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SECONDARY

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RETURN

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INLET

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STORAGE CISTERN

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OPEN VENT PIPES

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HOT WATER

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DISTRIBUTING

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PIPE

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SAFETY

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VALVE

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FIG. 13

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FIG. 14

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GOVT. SALT WATER MAIN

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CHECK

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GOVT. SALT WATER MAIN

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CHECK METER POSITION

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P

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METER

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POSITION

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C

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C

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O.F.

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O.F.

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O.F.

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P

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DUPLICATE PUMPS

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%%uLOT BOUNDARY

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%%uLOT BOUNDARY

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%%uSALT WATER FLUSHING SUPPLY SYSTEM

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INDIRECT SALT WATER FLUSHING SUPPLY SYSTEM (WITH DIRECT SUPPLY TO ROOF STORAGE TANK)

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INDIRECT SALT WATER FLUSHING SUPPLY SYSTEM (WITH SUMP AND PUMP SYSTEM)



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FIG. 16

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%%uLAYOUT DRAWING FOR SPRINKLER SYSTEM

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O.F.

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O.F.

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P

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G/F

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ROOF

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F

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SUMP

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TANK

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%%uLOT BOUNDARY

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PUMPS

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SPRINKLER

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INLET

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PUMPS

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SPRINKLER

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TANK

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SPRINKLER HEAD

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P

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C

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F

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F

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F

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F

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F

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F

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F

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F

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F

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P

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P

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P

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F

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PRESSURE SWITCH

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FOR PUMP STARTING

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ARRANGEMENT

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SUBSIDIARY

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STOP VALVE


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FIG. 17

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%%uLAYOUT DRAWING FOR IMPROVISED SPRINKLER SYSTEM

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G/F

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F

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ADDITIONAL BUTTERFLY VALVE WITHOUT

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STOP SCREW AND LOCK NUT ON HANDLE

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AND STRAPPED IN OPEN POSITION

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CONTROL VALVE

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CHECK METER HOUSED

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IN METER BOX

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FIRE SERVICE

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INLET

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%%uBOUNDARY

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C

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%%uLOT

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TEST VALVE

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SPRINKLER HEAD

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SUBSIDIARY

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STOP VALVE


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%%uLAYOUT DRAWING FOR FIRE HYDRANT/HOSE REEL SYSTEM

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FIG. 18

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P

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P

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B

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C

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B

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B

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B

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B

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B

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B

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B

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B

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B

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B

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P

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P

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G/F

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ROOF

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O.F.

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FIRE SERVICES

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INLET

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TO DRAIN

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PUMPS

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SUMP

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TANK

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%%uLOT BOUNDARY

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PUMPS

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FIRE HOSE REEL

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FIRE

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HYDRANT

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FIRE SERVICE TANK

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O.F.


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FIG. 19

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A

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FOR ROADS (SUCH AS DISTRICT AND LOCAL DISTRIBUTOR ROADS,

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RURAL ROADS B AND FEEDER ROADS) WITH FOOTWAY ONLY AND

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WITHOUT VERGE, HYDRANTS CAN BE ERECTED CLOSER TO THE

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EDGE OF THE CARRIAGEWAY BUT NOT LESS THAN 200mm FOR

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ANY PART OF THE INSTALLATIONS. FOR ROADS WITH A SPEED

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LIMIT OF 70km/h OR ABOVE. STRICT COMPLIANCE WITH THE

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REQUIREMENTS OF THE ABOVE TABLE IS REQUIRED.

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>50 AND <80

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>80

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%%uNOTES :

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<50

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600

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1000

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500

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600

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1000

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600

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OR

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TOWARDS HYDRANT

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AWAY FROM HYDRANT

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BUT NOT STEEPER

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THAN 2.5%

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DESIGN

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SPEED

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CARRIAGEWAY

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(IN km/h)

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AND STEEPER

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THAN 2.5%

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TOWARDS HYDRANT

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WHERE CARRIAGEWAY CROSS FALL IS

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MINIMUM CLEARANCE FROM KERB LINE (IN mm)

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CONCRETE THRUST BLOCK TO BE

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CAST AGAINST UNDISTURBED GROUND

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D.I. DOUBLE

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SOCKET

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90%%d BEND

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DN 150 D.I. COLLAR

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WITH MECHANICAL JOINT

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DN 150 GATE VALVE

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(CONTROL VALVE)

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DN 150 FLANGED

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SPIGOT PIECE

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KERB LINE

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CLEARANCE FROM

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KERB LINE

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(SEE TABLE BELOW)

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DN 150 D.I. PIPE

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DN 150 D.I. COLLAR

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WITH MECHANICAL JOINT

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DN 150 FLANGED

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SPIGOT PIECE

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TEE PIECE WITH

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FLANGED BRANCH

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DN 150 GATE VALVE

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(ISOLATION VALVE)

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A

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%%uLAYOUT PLAN OF THE TYPICAL INSTALLATION

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%%uOF DN 150 STREET FIRE HYDRANT

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200

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mm

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200

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mm

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x 750mm HIGH

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CONC. THRUST BLOCK

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600mm x 900mm


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FIG. 20

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FINISHED ROAD LEVEL

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%%uNOTES :

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1.

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THE CAP OF THE CONTROL VALVE SPINDLE SHOULD BE AT 250mm APPROX. BELOW THE VALVE COVER AND IN NO CASE

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%%uSECTION OF THE TYPICAL INSTALLATION OF DN 150 STREET FIRE HYDRANT

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SHOULD THE DISTANCE BE MORE THAN 500mm.

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D.I. FLANGE SPIGOT

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D.I. COLLAR WITH

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MECHANICAL JOINT

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D.I. COLLAR WITH

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MECHANICAL JOINT

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DN 150 GATE

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VALVE CHAMBER

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CONCRETE THRUST BLOCKS

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C.I. DOUBLE

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FLANGED 90%%d

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DUCKFOOT BEND

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C.I. DOUBLE

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FLANGED

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DISTANCE

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PIECES

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C.I. FLANGE

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SPIGOT

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C.I. ROUND HEAD FIRE HYDRANT

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285mm x 200mm C.I. SURFACE BOX

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TO BE DETERMINED

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ON SITE

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130

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mm

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APPROX.

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750 mm

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1000 mm

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%%uSECTION A - A


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FIG. 21

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C

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P

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P

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O.F.

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G.L.

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S.F.H.

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S.F.H.

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PUMP ROOM

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%%ULAYOUT DRAWING FOR STREET FIRE HYDRANT SYSTEM

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%%uABBREVIATION :

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S.F.H. STREET FIRE HYDRANT

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ROOM/CABINET

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CHECK METER

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DISCHARGE AT

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CONSPICUOUS

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LOCATION

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VALVE

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PIT


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%%uNOTES :

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1.

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A BYPASS ARRANGEMENT WITH THE PROVISION OF A SECOND PRESSURE REDUCING VALVE

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TO ENABLE ISOLATION OF ANY DEFECTIVE PRESSURE REDUCING VALVE FOR REPAIR AND

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2.

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THE PRESSURE REDUCING VALVES FOR USE WITH FRESH WATER SHOULD BE MANUFACTURED

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FROM MATERIALS SUITABLE FOR USE IN CONTACT WITH POTABLE WATER.

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3.

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THE PRESSURE REDUCING VALVES FOR USE WITH SALT WATER SHOULD BE MANUFACTURED

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FROM MATERIALS CAPABLE OF WITHSTANDING THE CORROSIVE EFFECT OF SALT WATER.

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REPLACEMENT IS USED.

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%%USCHEMATIC LAYOUT OF PRESSURE REDUCING VALVES

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TO INSIDE SERVICES

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WATER SUPPLY

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FROM GRAVITY

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TANK / PUMP

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PRESSURE GAUGE

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PRESSURE GAUGE

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FIG. 22

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(ONE DUTY, ONE BY-PASS)


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FIG. 23

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M

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SOIL

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LEVEL

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LOT

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BOUNDARY

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%%UWATERING FLOWER BEDS PLUMBING SYSTEM

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WP1

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WP2

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WP3

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WP4

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WP5

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%%uABBREVIATION :

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WP WATER POINT

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METER BOX



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FIG. 25

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DETAILS OF SUB-METER CHAMBER

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%%UPLAN OF TYPICAL SUB-METER CHAMBER

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C

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PROTECTION AGAINST CORROSION (NOTE 2)

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FLANGE OR SCREW JOINT WITH PROPER

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380

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80

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310

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50

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400

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100

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MIN. WORKING

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MAX PIPE DIAMETER

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CLEARANCE L (mm)

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(mm)

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FLOW

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NOTES :

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DETAILS OF THE CHAMBER SIMILAR TO WASTE DETECTION CHAMBER AND SHALL BE REFERRED TO WSD STANDARD DRAWING 1.32.

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1.

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700

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MIN. DISTANCE BETWEEN CENTRELINE OF PIPE

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AND INTERNAL WALL FACE D (mm)

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PROTECTION TO FLANGE JOINT / COUPLING / ADAPTOR SHALL BE PROVIDED USING PETROLEUM ANTICORROSION TAPES

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2.

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WITH PRIMER AND MASTIC FILLER.

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S.S. CATLADDER








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FIG. 32

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GATE VALVE

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LOOSE JUMPER STOPCOCK

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NON-RETURN VALVE

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LEGEND :

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DETAILS OF SUB-METER BOX AND CABINET

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%%UELEVATION FOR TYPICAL SUB-METER CABINET

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%%UFOR PIPE DIAMETER 50mm TO 150mm

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MAX. 1500

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METER CABINET

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INTERNAL FACE OF

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F.L.

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%%UELEVATION FOR TYPICAL SUB-METER BOX

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%%UFOR PIPE DIAMETER 40mm OR BELOW

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C

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MAX. 1500

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F.L.

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800

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25

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700

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15

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900

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40

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MIN. LENGTH OF

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PIPE DIAMETER

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METER BOX (mm)

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(mm)

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770

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80

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450

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50

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855

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100

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MIN. LENGTH BETWEEN GATE VALVE

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PIPE DIAMETER

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AND NON-RETURN VALVE (mm)

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(mm)

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1235

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150

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C

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CHECK METER

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CHECK METER

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MIN. 300 &

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MIN. 300 &




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FIG. 35

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A4 210x297

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SUSPENSION NOTICE OF FRESH WATER SUPPLY/ TEMPORARY MAINS WATER FOR FLUSHING

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NOTE: WHEN REPLACEMENT OF MASTER METER FOR FIRE SERVICE IS REQUIRED, A COPY OF ABOVE SUSPENSION NOTICE SHOULD BE SENT TO FIRE SERVICE COMMUNICATION CENTRE OF FIRE SERVICES DEPARTMENT (FAX NO.: 2311 0066).

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Technical Requirements for Plumbing Works in …...FIG. 6C G17-267_04_rev1.dwg A4 210x297 SCHEMATIC...

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