WIXLIB

BDBuildings Department, the Government of theHong Kong Special Administrative RegionBSBritish Standards, including British StandardSpecifications and British Standard Codes ofPractice, published by the British StandardsInstitutionBS ENEuropean Standard adopted as British StandardBSBThe Building Services Branch of theArchitecturalServicesDepartment,theGovernment of the Hong Kong SpecialAdministrative RegionBuildingContractorThe Contractor employed by the Employer forthe execution of the Works or the SpecialistContractor separately employed by the Employerto execute the Specialist Works as appropriate.CCMSCentral Control and Monitoring SystemCIBSEThe Chartered Institution of Building ServicesEngineersConditionsThe “Conditions of Contract” as defined in theContract. For Nominated Sub-contract works,the “Main Contract Conditions” and the“Sub-contract Conditions” as defined in theNominated Sub-contract as appropriateDI GeneralSpecificationThe General Specification for DrainageInstallation in Government Buildings of theHKSAR issued by ArchSDDSDDrainage Services Department, the Governmentof the Hong Kong Special Administrative RegionEMSDElectrical and Mechanical Services Department,the Government of the Hong Kong SpecialAdministrative RegionEPDEnvironmental Protection Department, theGovernment of the Hong Kong SpecialAdministrative RegionEPDMEthylene propylene diene monomer (M-class)FRPFibreglass reinforced polyesterSection A1Page 2 of 4PI GS2017 Edition

FRRFire resistance rating as defined in the Code ofPractice for Fire Safety in Buildings published byBuildings Department, the Government of theHKSARFSDFire Services Department, the Government of theHong Kong Special Administrative RegionG.I.Galvanised IronGRPGlass Reinforced PlasticsHOKLASThe Hong KongSchemeIECInternational Electrotechnical CommissionInstallationsThe work or services for the PlumbingInstallation forming parts of the Works to beinstalled, constructed, completed, maintainedand/or supplied in accordance with the Contractand includes Temporary WorksIPIndex of ProtectionISOInternational Organization for StandardizationLPHWLow Pressure Hot WaterL.V.Low VoltageODOutside DiameterOr equivalentstandardsMeans internationally recognised standardsacceptable to the Supervising Officer havingsimilar requirements and specification as regardsto the type of construction, functions,performance, general appearance and standard ofquality of manufacture and approved by theSupervising OfficerO&MOperation and MaintenanceParticularSpecificationThe specifications drawn up specifically for theInstallations of a particular projectPlumbingContractorThe Nominated Sub-contractor, the SpecialistSub-contractor, or the Sub-contractor employedby the Building Contractor or the Contractordirectly employed by the Employer asappropriate for the execution of the PlumbingInstallations in accordance with the ContractSection A1Page 3 of 4Laboratory AccreditationPI GS2017 Edition

A1.4PNPractice Notes for Authorised Persons,Registered Structural Engineers and RegisteredGeotechnical Engineers issued by BuildingsDepartmentProprietarybrand nameproducts ormaterialsThe phrase “or alternative products or materialshaving equivalent functions or performance” isdeemed to be included wherever products ormaterials are specified by proprietary brandnames in the Contract. Alternative products ormaterials of different brands or manufacturehaving equivalent functions or performancemaybe submitted for the consideration of theSupervising Officer.PVCPolyvinyl ChlorideSCCUStatutory Compliance Checking Unit establishedwithin ArchSDSupervisingOfficerThe Supervising Officer or the MaintenanceSurveyor defined in the Contract as appropriateTenderThe Contractor’s tender for the Contract or theNominated Sub-contractor’s tender for theNominated Sub-contract as appropriateULUnderwriters LaboratoriesUPVCUnplasticised Polyvinyl ChlorideUVUltra-violetVSDVariable Speed DriveWAWater Authority, the Government of the HongKong Special Administrative RegionWRASWater Regulations Advisory Scheme of UnitedKingdom (UK)WSDWater Supplies Department, the Government ofthe Hong Kong Special Administrative RegionSINGULAR AND PLURALWords importing the singular only also include the plural and vice versa wherethe context requires.Section A1Page 4 of 4PI GS2017 Edition

SECTION A2STATUTORY OBLIGATIONS AND OTHER REGULATIONSA2.1STATUTORY OBLIGATIONS AND OTHER REQUIREMENTSThe Installations shall conform in all respects with the followings:A2.1.1Statutory ObligationsAll Enactments and Regulations, in particular, the PlumbingContractor’s attention is drawn to the followings:(a)Buildings Ordinance (Cap. 123);(b)Building (Administration) Regulations under BuildingsOrdinance (Cap. 123);(c)Building (Construction)Ordinance (Cap. 123);(d)Building (Standard of Sanitary Fitments, Plumbing, DrainageWorks and Latrines) Regulations under Buildings Ordinance(Cap. 123);(e)Building (Planning) Regulations under Buildings Ordinance(Cap. 123);(f)Building (Refuse Storage and Material Recovery Chambersand Refuse Chutes) Regulations under Buildings Ordinance(Cap. 123);(g)Waterworks Ordinance (Cap. 102), and other subsidiarylegislation made under the Ordinance;(h)Fire Services Ordinance (Cap. 95), and other subsidiarylegislation made under the Ordinance;(i)Electricity Ordinance (Cap. 406), and other subsidiarylegislation made under the Ordinance;(j)Noise Control Ordinance (Cap. 400), and other subsidiarylegislation made under the Ordinance;(k)Water Pollution Control Ordinance (Cap. 358), and othersubsidiary legislation made under the Ordinance;(l)Air Pollution Control Ordinance (Cap. 311), and othersubsidiary legislation made under the Ordinance;Section A2Page 1 of 4RegulationsunderBuildingsPI GS2017 Edition

A2.1.2(m)Ozone Layer Protection Ordinance (Cap. 403), and othersubsidiary legislation made under the Ordinance;(n)Waste Disposal Ordinance (Cap. 354), and other subsidiarylegislation made under the Ordinance;(o)Environmental Impact Assessment Ordinance (Cap. 499), andother subsidiary legislation made under the Ordinance; and(p)Land (Miscellaneous Provisions) Ordinance (Cap. 28), andother subsidiary legislation made under the Ordinance.(q)Buildings Energy Efficiency Ordinance (Cap. 610), and othersubsidiary legislation made under the Ordinance.(r)Energy Efficiency (Labelling of Products) Ordinance (Cap.598).Other Requirements(a)Practice Notes for Authorised Persons, Registered StructuralEngineers and Registered Geotechnical Engineers issued byBD;(b)Practice Notes of Professional Persons EnvironmentalConsultative Committee issued by EPD;(c)Hong Kong Waterworks Standard RequirementsPlumbing Installations in Buildings issued by WSD;(d)Water Supplies Department Circular Letters issued toLicensed Plumbers and Authorised Persons(e)Handbook on Plumbing Installation for Buildings issued byWSD;(f)Codes of Practice for Minimum Fire Service Installations andEquipment and Inspection, Testing and Maintenance ofInstallations and Equipment published by FSD;(g)Requirements and Circular Letters of FSD;(h)Code of Practice for Fire Safety in Buildings published byBD;(i)Code of Practice for the Electricity (Wiring) Regulationspublished by EMSD;(j)Code of Practice for Energy Efficiency of Building ServicesInstallation issued by EMSD; hereinafter referred as the“Building Energy Code” or “BEC”;Section A2Page 2 of 4forPI GS2017 Edition

A2.1.3(k)General Specification for Building issued by ArchSD;(l)General Specification for Air-conditioning, Refrigeration,Ventilation and Central Monitoring & Control SystemInstallation in Government Buildings of the HKSAR issuedby ArchSD;(m)General Specification for Drainage Installation inGovernment Buildings of the HKSAR, issued by ArchSD;(n)General Specification for Electrical InstallationGovernment Buildings of the HKSAR issued by ArchSD;(o)General Specification for Fire Service Installation inGovernment Buildings of the HKSAR issued by ArchSD;(p)Design Manual: Barrier Free Access 2008 published by BD;(q)Technical Memorandum to issue Air Pollution AbatementNotice to control Air Pollution from Stationary Processesissued by EPD;(r)Technical Memorandum for the Assessment of Noise fromPlaces other than Domestic Premises, Public Places orConstruction Sites issued by EPD;(s)Technical Memorandum on EnvironmentalAssessment Process issued by EPD;(t)Code of Practice for Prevention of Legionnaires' Diseaseissued by the Prevention of Legionnaires' Disease Committee,the Government of the HKSAR; and(u)The Supply Rules and other requirements issued by therelevant local electricity suppliers and Water Authority;inImpactSafety Requirements(a)Occupational Safety and Health Ordinance (Cap. 509), andother subsidiary legislation made under the Ordinance;(b)Factories and Industrial Undertakings Ordinance (Cap. 59),and other subsidiary legislation made under the Ordinance;(c)Public Health and Municipal Services Ordinance (Cap. 132),and other subsidiary legislation made under the Ordinance;(d)Construction Sites (Safety) Regulations, Factories andIndustrial Undertakings Ordinance (Cap. 59);(e)Construction Site Safety Manual issued by the DevelopmentBureau, the Government of the HKSAR;Section A2Page 3 of 4PI GS2017 Edition

A2.1.4(f)Code of Practice on Working near Electricity Supply Linespublished by EMSD; and(g)Code of Practice on Avoiding Danger from Gas Pipespublished by EMSD.Technical StandardsBS, BS EN, ISO Standards, IEC Standards and Codes of Practice,etc. shall be deemed to include all amendments, revisions andstandards superseding the standards listed herein, which arepublished before the date of first tender invitation for the Contract orthe Nominated Sub-contract (as appropriate) unless otherwisespecified.A summary of technical standards quoted in this GeneralSpecification to which the Installations shall comply is listed inAnnex I.A2.2CASE OF CONFLICTThe documents forming the Contract are to be taken as mutually explanatory ofone another but in case of ambiguities or discrepancies the same shall be dealtwith in accordance with the Conditions.Section A2Page 4 of 4PI GS2017 Edition

SECTION A3EXECUTION OF INSTALLATIONSA3.1THE INTERNATIONAL SYSTEM OF UNITS (SI)The International System of Units of weights and measures shall be used forall materials, equipment and measurements.A3.2PROGRAMME OF INSTALLATIONSThe Plumbing Contractor shall submit to the Supervising Officer a detailedprogramme of the Installations within 4 weeks from the acceptance of hisTender showing the intended method, stages and order of work execution incoordination with the building construction programme, together with theduration he estimated for each and every stage of the Installations. Theprogramme shall include at least the following:(a)Dates for the placement of orders for equipment and materials;(b)Expected completion dates for builder’s work requirements, i.e. whenwork site needs to be ready;(c)Delivery dates of equipment and materials to the Site;(d)Dates of commencement and completion of every stage of theInstallations in line with the building construction programme, i.e.each floor level and/or zone area;(e)Dates of documents/drawings submissions to relevant Governmentdepartments to obtain the necessary approvals;(f)Dates of requirement of temporary facilities necessary for testing &commissioning, e.g. electricity supply, water and town gas.(g)Dates of water supply and drainage/sewage pipe connection;(h)Dates of completion, testing and commissioning; and(i)Short term programmes showing the detailed work schedules ofcoming weeks and months shall also be provided to the SupervisingOfficer. Programmes shall be regularly updated to reflect the actualprogress and to meet the Plumbing Contractors’ obligations under theContract.In addition, detailed submission schedules for installation drawings, equipmentand testing and commissioning shall be submitted to the Supervising Officerfor approval. The formats and information to be included in the schedules shallbe as directed by the Supervising Officer.Section A3Page 1 of 8PI GS2017 Edition

A3.3BUILDER’S WORKAll builder’s work including openings or holes through building structure orpartition walls; trenches, ducts and cutting; and all plinths, concrete bases,supports, ducts, etc. required for the Installations will be carried out as part ofthe building works by the Building Contractor at the expense of the Employerprovided that the Plumbing Contractor has submitted full details of suchrequirements within a reasonable time to the Supervising Officer for approval,so that due consideration may be given before the Building Contractorcommences the building works in accordance with the building programme inthe areas concerned. After obtaining the said approval of the SupervisingOfficer, the Plumbing Contractor is required to mark out at the relevantlocations of the Site the exact positions and sizes of all such works and toprovide detailed information of such works to the Building Contractor tofacilitate him to carry out the builder’s works as the works proceed.All "cutting-away" and "making-good" as required to facilitate the PlumbingContractor’s works will be carried out by the Building Contractor, except forminor provisions required for the fixing of screws, raw plugs, redhead bolts,etc. which shall be carried out by the Plumbing Contractor. The PlumbingContractor shall mark out on Site and/or supply drawings of all "cutting-away"to the Building Contractor within a reasonable time.All expenses properly incurred and losses suffered by the Employer as a resultof the Plumbing Contractor’s failure to comply with the above requirementsare recoverable by the Employer from the Plumbing Contractor as a debt underthe Contract or via the Building Contractor as if it is a debt liable to the BuildingContractor under the Sub-contract as appropriate.The Plumbing Contractor shall ensure that such works are essential for theexecution of the Installations. In the event that any of such works is proved tobe non-essential, unnecessary and/or abortive, the Plumbing Contractor shallbear the full cost of such works including but not limited to any unnecessary orincorrect cutting-away and making-good and shall reimburse the Employer forall cost incurred in this connection are recoverable by the Employer from thePlumbing Contractor as a debt under the Contract or via the Building Contractoras if it is a debt liable to the Building Contractor under the Sub-contract asappropriate.Upon completion of the builder’s works by the Building Contractor, thePlumbing Contractor shall forthwith check and examine that all builder’sworks so executed have been completed in accordance with his requirements.If at any time it becomes apparent to the Plumbing Contractor that anybuilder’s works completed by the Building Contractor does not comply withhis requirements in any respect whatsoever, the Plumbing Contractor shallforthwith give notice in writing to the Supervising Officer and specify indetails the extents and effects of such non-compliance in that notice. ThePlumbing Contractor is deemed to have satisfied with the builder’s works aftera period of 14 days from the date of completion of the builder’s works if theabove notice is not served to the Supervising Officer within such period. Alladditional expenditure properly incurred and all loss suffered in thisSection A3Page 2 of 8PI GS2017 Edition

connection by the Employer in having such works re-executed and rectifiedshall be recoverable by the Employer from the Plumbing Contractor as a debtunder the Contract or via the Building Contractor as if it is a debt liable to theBuilding Contractor under the Sub-contract as appropriate.A3.4COORDINATION OF INSTALLATIONSThe Plumbing Contractor shall coordinate the Installations with those works ofthe Building Contractor and any other contractors and sub-contractors of theBuilding Contractor.The Plumbing Contractor shall note that the Drawings supplied to him onlyindicate the approximate locations of the Installations. He shall make anymodification reasonably required of his programme, work sequence andphysical deployment of his work to suit the outcome of work coordination oras necessary and ensure that all cleaning, adjustment, test and control pointsare readily accessible while keeping the number of loops, cross-overs and thelike to a minimum.The Plumbing Contractor shall pay particular attention to the building worksprogramme and shall plan, coordinate and programme his works to suit andadhere to the building works in accordance with the building programme.Any significant problems encountered during the coordination work, which arebeyond the Plumbing Contractor’s control, shall promptly be reported to theSupervising Officer.A3.5COOPERATION WITH OTHER CONTRACTORSThe Plumbing Contractor shall cooperate at all times with the BuildingContractor and all other contractors and sub-contractors of the BuildingContractor in order to achieve efficient workflow on the Site and keep the Sitein a clean and tidy condition.Any significant problems beyond the Plumbing Contractor’s control shallpromptly be reported to the Supervising Officer.A3.6SITE SUPERVISIONThe Plumbing Contractor shall keep on the Site a competent and technicallyqualified site supervisor to control, supervise and manage all his Installationson Site. The site supervisor shall be vested with suitable powers to receiveinstructions from the Supervising Officer and his Representative.The site supervisor shall be technically competent and have adequate siteexperience for the Installations. The qualified and competent site supervisorshall have minimum 5 years on site experience for similar type of installationworks. The Plumbing Contractor shall also refer to the Particular Specificationfor other specific requirements, if any, on site supervision.Section A3Page 3 of 8PI GS2017 Edition

Approval by the Supervising Officer shall be obtained prior to the posting ofthe site supervisor on Site. The Plumbing Contractor shall immediately replacethe site supervisor whose experience, skill or competency is, in the opinion ofthe Supervising Officer, found to be inadequate for the particular work.All tradesmen must be experienced in the trade and the work carried out shallbe consistent with good practice in Hong Kong and to the satisfaction of theSupervising Officer. In this connection, the Plumbing Contractor’s attention isdrawn to the Special Conditions of Contract under the Contract for therequirements relating to Qualified Tradesmen/Qualified Skilled Workers andIntermediate Tradesmen/Qualified Semi-skilled Workers.The Plumbing Contractor shall also employ a full time competent foreman onSite for each trade. All trade foremen shall be registered tradesmen/skilledworkers of the relevant trade.A3.7SAMPLE BOARDWithin 6 weeks of the acceptance of his Tender and prior to thecommencement of the Installations, the Plumbing Contractor shall submit tothe Supervising Officer for approval a

The Plumbing Installations shall comply with this General Specification which details the intrinsic properties (including materials and workmanship) of the Installations in so far as it is not overridden by the Conditions, Particular Specification, Drawings and/or written instructions of the Supervising Officer. A1.2 SCOPE OF THE INSTALLATIONS