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Obsolete WSD Circular Letters

Please note that all the circular letters held under this web page are in PDF format and you need to download the latest version of Acrobat Reader to view and print these documents.

The following list is a complete set of existing Circular Letters that are currently in force.

From time to time, new Circular Letters are added to the list to promulgate new policy decisions and procedures. Circular Letters are removed from the list when they are outdated or their contents have been subsumed in other relevant publications issued by Water Supplies Department.

A full set of circular letters can be downloaded (file size of ~6.2MBytes) at this link.

Please note that all the circular letters held under this web page are in PDF format and you need to download the latest version of Acrobat Reader to view and print these documents.

The following list is a complete set of existing Circular Letters that are currently in force.

From time to time, new Circular Letters are added to the list to promulgate new policy decisions and procedures. Circular Letters are removed from the list when they are outdated or their contents have been subsumed in other relevant publications issued by Water Supplies Department.

A full set of circular letters can be downloaded (file size of ~12 MBytes) at this link.

Please note that all the circular letters held under this web page are in PDF format and you need to download the latest version of Acrobat Reader to view and print these documents.

The following circular letters have been either superseded or subsumed under relevant documents. For the subsumed circular letters, the policies and procedures contained therein can now be found in the document(s) (Technical Requirements for Plumbing Works in Buildings and Guide to Application for Water Supply) indicated in the table below and should continue to be followed.

FAQs for Obsolete Circular Letters

No. Description Reason of Removal Date Removed Category Applicable to
LP AP
2021
Addendum to 5/2021 Voluntary Scheme in Enhancing Plumbing Works Control Stage 1 – Registration of Registered Plumbing Contractors (Provisional) Subsumed into Addendum No. 2 to CL 5/2021 2022/04/22 1 Yes Yes
5/2021 Voluntary Scheme in Enhancing Plumbing Works Control Stage 1 – Registration of Registered Plumbing Contractors (Provisional) Subsumed into Addendum No. 2 to CL 5/2021 2022/04/22 1 Yes Yes
8/2021 Enhanced Processing Mechanism for Application for Water Supply for New Buildings Subsumed into Section 3.15 and Appendix 36 of "Guide to Application for Water Supply" 2021/12/31 3 Yes Yes
7/2021 Record of Cleansing and Disinfection of Fresh Water Inside Service under the Commissioning Requirements Subsumed into Section 4.4.5 and Appendix 37 of "Guide to Application for Water Supply" 2021/12/31 3 Yes Yes
6/2021 New Requirement on Meter Position for 40mm Meters Subsumed into Figure 4 of ‘Technical Requirements for Plumbing Works in Buildings’ 2021/12/31 3 Yes Yes
4/2021 Updated Pre-approved Standard Plumbing Designs for New Village Type Houses Subsumed into Section 3.13.1 and Appendices 29 and 30 of "Guide to Application for Water Supply" 2021/12/31 3 Yes Yes
2020
6/2020 Updated Version of “Technical Requirements for Plumbing Works in Buildings” and “Guide to Application for Water Supply” Obsolete 2021/12/31 3 Yes Yes
5/2020 Electronic Submission for Simple Cases of Applications for Water Supplies Subsumed into Section 3.14 and Appendix 34 of "Guide to Application for Water Supply" 2020/12/02 3 Yes Yes
4/2020 Mandatory Lead Check for Soldering Materials in Pipe-fittings with Integral Solder Ring upon delivery to Site Subsumed into Sections 4.1.4 and 4.3.1.3 of "Guide to Application for Water Supply" 2020/12/02 3 Yes Yes
2/2020 New Application Form and Streamlined Procedure to enhance completeness of Submission Documents for Applications for Water Supplies Subsumed into Section 3.2.1 and Appendix 2 of "Guide to Application for Water Supply" 2020/12/02 3 Yes Yes
1/2020 Minimum Meter Size Requirement for Trade Fresh Water Supply to Designated Business Categories Subsumed into Section 3.1.11 of ‘Technical Requirements for Plumbing Works in Buildings’ 2020/12/02 3 Yes Yes
2019
11/2019 Water Efficiency Requirements for Water-closet Fitment in Inside Service Subsumed into Sections 7.1.1, 7.3.4 and 7.5.2 of ‘Technical Requirements for Plumbing Works in Buildings’ 2020/12/02 3 Yes Yes
10/2019 Updated Version of “Technical Requirements for Plumbing Works in Buildings” and “Guide to Application for Water Supply” Obsolete 2020/12/02 3 Yes Yes
9/2019 Installation of Security Seals for Newly Installed Water Meters of size 40mm or above Subsumed into Section 4.2.4 and Appendix 35 of "Guide to Application for Water Supply" and Section 3.1.12 of ‘Technical Requirements for Plumbing Works in Buildings’ 2020/12/02 3 Yes Yes
8/2019 Penalty and Demerit Point System for Managing the Performance of Licensed Plumbers Subsumed into Section 4.3.5 of "Guide to Application for Water Supply" 2020/12/02 1 Yes Yes
7/2019 Electronic Submission for Applications for Water Supplies to New Village Type Houses using Pre-approved Standard Plumbing Design Drawings Subsumed into Section 3.13 and Appendices 29 to 33 of "Guide to Application for Water Supply" 2020/12/02 3 Yes Yes
6/2019 Streamlined Measures for Processing Applications for Water Supply to New Village Type Houses Subsumed into Section 3.2.3, Appendices 27 and 28 of "Guide to Application for Water Supply" 2020/12/02 3 Yes Yes
5/2019 Streamlined Measures for Processing Applications for Water Supplies to Improvised Sprinkler Systems Subsumed into Section 3.5.1 of "Guide to Application for Water Supply" 2020/12/02 3 Yes Yes
3/2019 Control on Lining Materials of Potable Water Tanks of Inside Service Subsumed into Part B: B9 of ‘Technical Requirements for Plumbing Works in Buildings’ 2020/12/02 4 Yes Yes
2/2019 Procedures for Applications for Water Supply in New Building Projects adopting "Modular Integrated Construction" Method Subsumed into Sections 3.12, 4.1.3, 4.2A, 4.3.2A, 4.3.3A, Appendices 2 and 26 of 'Guide to Application for Water Supply' 2019/10/21 3 Yes Yes
1/2019 Streamlined workflow for effecting of water supply to new village houses after disinfection of inside service Subsumed into Section 4.5.1 of 'Guide to Application for Water Supply' 2019/10/21 3 Yes Yes
2018
6/2018 Streamlined Procedures for Processing Applications for Water Supplies for Village Type Houses and Separate Metering Subsumed into Sections 3.2.1A, 3.10, 4.1, 4.1.1, 4.1.2, 4.3.3, 4.8, Appendices 2, 3, 6 and 7 of 'Guide to Application for Water Supply' 2019/10/21 3 Yes Yes
5/2018 Streamlined Procedures for Processing Applications for Temporary Water Supplies for Construction Site Subsumed into Section 3.11 of 'Guide to Application for Water Supply' 2019/10/21 3 Yes Yes
9/2017 Addendum to Circular Letter No. 9/2017 - New Commissioning Requirements for New Plumbing Works - Revised Systematic Flushing Record Form for New Buildings Subsumed into Section 4.4.1, Appendices 2, 17 and 18A of 'Guide to Application for Water Supply' 2019/10/21 3 Yes Yes
4/2018 Technical Requirements for Plumbing Works in Buildings and Guide to Application for Water Supply Obsolete 2019/10/21 3 Yes Yes
3/2018 Standing Arrangement for Random Inspection of New Plumbing Works during Construction Stage Subsumed into Section 8 of ‘Guide to Application for Water Supply’ 2018/10/01 1 Yes Yes
1/2018 Scheme on Voluntary Submission of Inspection Checklist Subsumed into Section 4.3.6 of ‘Guide to Application for Water Supply' 2018/10/01 3 Yes Yes
2017
10/2017 New Commissioning Requirements for Plumbing Works in Occupied Buildings/Village Houses Subsumed into Section 4.3.4 & 4.4 and Appendix 19 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
9/2017 New Commissioning Requirements for New Plumbing Works (Please read in conjunction with Addendum to Circular Letter No. 9/2017) Subsumed into Section 4.4 and Appendix 19 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
7/2017 Submission of Consumption Flow Rates and Installation of Flow Restrictor Subsumed into Sections 3.6, 4.2.3, Appendices 22, 23 and 24 of 'Guide to Application for Water Supply' 2019/10/21 3 Yes Yes
6/2017 Systematic Flushing for New Plumbing Works Subsumed into Section 4.3.1.2, 4.4.1 and 5 and Appendix 17 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
5/2017 Online Re-plumbing Works Subsumed into Section 3.3, 4.3.1.2 & 4.7and Appendix 3, 10, 11 and 20 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
4/2017 Random Inspection of New Plumbing Works during Construction Stage Superseded by CL No. 3/2018 2018/10/01 1 Yes Yes
3/2017 Enhancement Measures for Processing Applications for Water Supplies Subsumed into Section 3.2.1, 4.1.1 and 4.3.1.1 and Appendix 2 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
2/2017 Water Efficiency Requirements for Fittings in Inside Service Subsumed into Section 4.1.2 and Appendix 7 of ‘Guide to Application for Water Supply’ and Section 7.3 and 7.4 of ‘Technical Requirements for Plumbing Works in Buildings’ 2018/10/01 3 Yes Yes
1/2017 WSD Circular Letters in Force Obsolete 2018/10/01 1 Yes Yes
2016
2/2016 Inspection and Approval of Plumbing Works Subsumed into Section 4.4.3 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
1/2016 WSD Circular Letters in Force Obsolete 2017/01/13 1 Yes Yes
2015
9/2015 Task Group on Implementation of New Improvement Measures for Controlling Construction of Inside Service Subsumed into Section 4.3.5 and 4.8 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
8/2015 Inspection of Plumbing Works and Point Penalty System Subsumed into Section 4.3.3 and 4.3.5 of ‘Guide to Application for Water Supply’ 2018/10/01 1 Yes Yes
7/2015 Revision of Application Forms and Pipes and fittings to be Installed in Plumbing Works A new version of Form WWO 46 (version 01/19) was promulgated through WSD CL No. 6/2018. Form WWO 132 (9/2015) has been used for several years and the relevant parties are familiar with this version of the form. 2019/01/01 3 Yes Yes
6/2015 Application for Water Supply Pipes and Fittings Approval Subsumed into Part B:B2.1.2 of 'Technical Requirements for Plumbing Works in Buildings' 2019/10/21 4 Yes Yes
5/2015 Water Sampling and Solder Joint Sampling and Testing for Newly Installed Fresh Water Inside Service Subsumed into Section 4.3.4 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
4/2015 Soldering for Copper Pipe Connections Subsumed into Section 4.1.1.2 ‘Technical Requirements for Plumbing Works in Buildings’ 2018/10/01 3 Yes Yes
3/2015 Updated Contact List of Case Officers for Application for Water Supplies Subsumed into Section 4.7.2 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
2014
1/2014 Preventing Unauthorised Use of Mains Water for Fresh Water Cooling Towers Subsumed into Section 3.4 of ‘Guide to Application for Water Supply’ and Section 4.2.6.3.4 of ‘Technical Requirements for Plumbing Works in Buildings’ 2018/10/01 3 Yes Yes
2012
3/2012 Licensed Plumber Directory (ESD Function) - Geographical Districts Served by Plumbers (Chinese version Only) Obsolete 2016/01/26 1 Yes NA
2/2012 Cleansing and Disinfection of Fresh Water Inside Service Subsumed into Sections 4.4.1, 4.4.2, Appendices 19 and 25 of 'Guide to Application for Water Supply' 2019/10/21 2 Yes Yes
2010
5/2010 Revision of Fees for Plumber's Licence Application and Associated Payments Obsolete 2016/01/26 2 Yes Yes
4/2010 New Facility - <Online Payment and Renewal/Reissue of Plumbers' Licence> (Chinese version Only) Obsolete 2016/01/26 1 Yes NA
2/2010 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
1/2010 Minimum Flow Requirements for Draw-off Taps, Single and Combination Taps Subsumed into Section 2.1.2 and Part B:B7 'Technical Requirements for Plumbing Works in Buildings' 2019/10/21 2 Yes Yes
2009
1/2009 Pilot Scheme for the Submission of the Pre-approved Material List by Licensed Plumber for the Application for Water Supply for the Food Business (Restaurant) Premises Obsolete 2016/01/26 3 Yes Yes
2008
1/2008 Amendment to Point Penalty System for Defects in Plumbing Works Carried Out by Licensed Plumbers Obsolete 2016/01/26 1 Yes Yes
2007
4/2007 Amendment to "Hong Kong Waterworks Standard Requirement" Obsolete 2016/01/26 2 Yes Yes
3/2007 Enhancement for Application of Water Supplies Obsolete 2016/01/26 3 Yes Yes
2/2007 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
1/2007 Reduction of the Minimum Residual Pressure Obsolete 2016/01/26 2 Yes Yes
2006
4/2006 Implementation of 5-Day Week for Applications of Plumbers' Licences Obsolete 2016/01/26 1 Yes Yes
2/2006 Addendum to WSD Circular Letter No. 2/2006 - Implementation of Master Metering Policy for Fresh Water and Temporary Mains-water for Flushing Inside Service and Fire Service Obsolete 2016/01/26 2 Yes Yes
2/2006 Amendment to WSD Circular Letter No. 5/2005 - Implementation of Master Metering Policy for Fresh Water and Temporary Mains-water for Flushing Inside Service and Fire Service (This Circular Letter is to be read in conjunction with Circular Letter No. 5/2005) Obsolete 2016/01/26 2 Yes Yes
1/2006 Implementation of 5-day Week in Water Supplies Department Obsolete 2016/01/26 1 Yes Yes
2005
5/2005 Implementation of Master Metering Policy for Fresh Water and Temporary Mains-water for Flushing Inside Service and Fire Service Obsolete 2016/01/26 2 Yes Yes
4/2005 Guideline on the Installation and Removal of MSL-TD88 Meters Obsolete 2016/01/26 2 Yes Yes
3/2005 Updated List of Persons to Contact in Water Supplies Department About Processing of Application for New Water Supply Obsolete 2016/01/26 3 Yes Yes
2/2005 Dropbox for Documents on Application for Metered Supply to New Building Projects Obsolete 2018/10/01 3 Yes Yes
1/2005 Reply with Quoting Reference and Plumbing Project/Service Address Obsolete 2016/01/26 1 Yes Yes
2004
5/2004 Rolling Out of Customer Care and Billing System Phase IIa Application of Plumbers' Licence and Application of Water Supply Obsolete 2016/01/26 3 Yes Yes
4/2004 Installation of Domestic Water Filters (including Water Filters Incorporated in Water Using Apparatuses, such as Drinking Fountain etc.) Obsolete 2016/01/26 2 Yes Yes
3/2004 Revision of Form WWO132 Obsolete 2016/01/26 3 Yes Yes
2/2004 Excavation Permit Fees under the Land (Miscellaneous Provisions) (Amendment) Ordinance 2003 Obsolete 2016/01/26 1 Yes Yes
1/2004 Change in WWO 46 Submission Practice Obsolete 2016/01/26 3 Yes Yes
2003
7/2003 No Need to Re-apply for Acceptance or No-objection Letters of the Same Pipes and Fittings Obsolete 2016/01/26 2 Yes Yes
6/2003 Advice on Installation of a Filter before the Flushing Valve Subsumed into Section 6.10.2.11 'Technical Requirements for Plumbing Works in Buildings' 2019/10/21 2 Yes Yes
5/2003 Imposition of 5% and 10% Surcharge to Overdue Charge on Connection and Meter Installation for New Buildings Obsolete 2016/01/26 3 Yes Yes
4/2003 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
3/2003 Re-structuring of Customer Services Districts of the Water Supplies Department Obsolete 2016/01/26 1 Yes Yes
2/2003 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
1/2003 Issue of "No-objection" Letters of Thermoplastic Pipes Obsolete 2017/01/13 4 Yes Yes
2002
8/2002 Renewal of Plumber's Licences Obsolete 2016/01/26 1 Yes NA
7/2002 Re-organisation of the Water Supplies Department Obsolete 2016/01/26 1 Yes Yes
6/2002 Cleaning and Sterilization of Fresh Water Mains of Inside Service Obsolete 2016/01/26 2 Yes Yes
5/2002 Waste Minimization Provision of Sanitary Fitments and Fittings in New Buildings Subsumed into Section 7.1 of ‘Guide to Application for Water Supply’ 2018/10/01 3 Yes Yes
4/2002 Fresh Water Plumbing Quality Maintenance Recognition Scheme (renamed as "Quality Water Recognition Scheme for Buildings" since 1.1.08) Obsolete 2016/01/26 1 Yes Yes
3/2002 Approval of Water Supply Fittings Obsolete 2016/01/26 4 Yes Yes
2/2002 Helping Business Programme - Authorizing Private Developers and Authorized Persons to Undertake Water Supply Connection Works Obsolete 2016/01/26 1 Yes Yes
1/2002 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
2001
3/2001 A List of Licensed Plumbers Obsolete 2016/01/26 1 Yes Yes
2/2001 Form WWO 542 -Application for Water Supply / Request for Work to be Carried out by the Water Authority Obsolete 2016/01/26 3 Yes Yes
1/2001 Installation of Water Meters by Licensed Plumbers Subsumed into Section 4.2 of ‘Guide to Application for Water Supply’ 2018/10/01 2 Yes Yes
2000
4/2000 The Use of Valve Type Flushing Devices and Minimum Flushing Volume Obsolete 2016/01/26 2 Yes Yes
3/2000 Waiving the Requirement to Seek Approval for Commencement of Inside Service/Fire Service Works Obsolete 2016/01/26 3 Yes Yes
2/2000 Target Response Time for Completing the Key Activities in respect of the Application for New Water Supply Obsolete 2016/01/26 3 Yes Yes
1/2000 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
1999
7/1999 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
6/1999 Approval of Water Supply Fittings Obsolete 2016/01/26 4 Yes Yes
5/1999 Amendments to the Waterworks Regulations Obsolete 2016/01/26 2 Yes Yes
4/1999 Replumbing Works within Buildings Subsumed into Section 3.3.3 of ‘Guide to Application for Water Supply’ 2018/10/01 2 Yes Yes
3/1999 Delay in Reporting Completion of Plumbing Works Obsolete 2016/01/26 3 Yes Yes
2/1999 Helping Business Programme - Authorsing Private Developers and Authorised Persons to Undertake Water Supply Connection Works Obsolete 2016/01/26 1 Yes Yes
1/1999 Flushing Supply to Village Houses Subsumed into Section 3.1 of 'Guide to Application for Water Supply' 2019/10/21 3 Yes Yes
1998
3/1998 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
2/1998 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
1/1998 Enquiries Related to Applications for New Water Supply Obsolete 2016/01/26 3 Yes Yes
1997
3/1997 Helping Business Programme - Authorising Private Developers to Undertake Water Supply Connection Works Obsolete 2016/01/26 1 Yes Yes
2/1997 Licensing of Plumbers Obsolete 2016/01/26 1 Yes Yes
1/1997 Identification of Internal Fresh and Salt Water Mains within Large Developments Obsolete 2016/01/26 2 Yes Yes
1996
4/1996 Submission of Drawings for Approval Obsolete 2016/01/26 3 Yes Yes
3/1996 Hong Kong Waterwaters Standard Requirements (Aug 95) Amendment No. 1 Obsolete 2016/01/26 2 Yes Yes
2/1996 Hong Kong Waterworks Standard Requirements for Plumbing Installation in Buildings (August 1995) - Chinese Version Obsolete 2016/01/26 2 Yes Yes
1/1996 Bounded Volume of WSD Circular Letters (12/95) Obsolete 2016/01/26 1 Yes Yes
1995
6/1995 Hong Kong Waterworks Standard Requirements for Plumbing Installation in Buildings (August 1985) Obsolete 2016/01/26 2 Yes Yes
5/1995 Application for Constructing, Installing, Altering or Removing an Inside Service or Fire Service Obsolete 2016/01/26 3 Yes Yes
4/1995 A Guide to the Preparation of Plumbing Proposals Obsolete 2016/01/26 3 Yes Yes
3/1995 Use of Different Pipe Materials as Inside Service in Buildings Obsolete 2016/01/26 2 Yes Yes
2/1995 Amendments to the Hong Kong Waterworks Standard Requirements (HKWSR) Obsolete 2016/01/26 2 Yes Yes
1/1995 Abandonment of the Use of Unlined Galvanized Steel Pipes as a Fresh Water Inside Service Obsolete 2016/01/26 2 Yes Yes
1994
1/1994 Inspection of Concealed Inside Service/Fire Service Obsolete 2016/01/26 3 Yes Yes
1992
3/1992 Installation of Water Meters by Licensed Plumbers Obsolete 2016/01/26 3 Yes Yes
2/1992 Waterworks Regulation Part V - Lincensing of Plumbers Obsolete 2016/01/26 1 Yes NA
1/1992 Installation of Unvented Electric Thermal Storage Type Water Heaters Obsolete 2016/01/26 2 Yes Yes
1991
1/1991 Use of Galvanised Steel Pipe and Fittings with Protective Internal Lining on Cold Water Inside Services Obsolete 2016/01/26 2 Yes Yes
1990
3/1990 Installation of Unvented Electric Thermal Storage Type Water Heaters Obsolete 2016/01/26 2 Yes Yes
2/1990 Need for Plumbing Work to be Carried Out by Licensed Plumbers Obsolete 2020/04/07 2 Yes NA
1/1990 Illegial Connections at Meter Position and Installation of Inside Service or Fire Service Prior to Approval of Form G Obsolete 2020/04/07 2 Yes Yes
1989
1/1989 Application for Installation of Inside Services/Fire Services in New Building Projects Obsolete 2016/01/26 3 Yes Yes
NA Unvented Electric Storage Water Heater Obsolete 2016/01/26 2 Yes Yes
1988
1/1988 Installation of Water Meters for Large Building Projects Obsolete 2016/01/26 3 Yes Yes
1986
3/1986 Control of Pipes and Fittings Obsolete 2016/01/26 3 Yes Yes
2/1986 Amendments to Point Penalty System for Defects in Plumbing Works Carried Out by Licensed Plumbers Obsolete 2016/01/26 1 Yes NA
NA Approval of Water Supply Fittings (Supplementary No. 3) Obsolete 2016/01/26 4 Yes Yes
1985
NA Point Penalty System for Defects in Plumbing Works Carried Out by Licensed Plumbers (Supplementary) Obsolete 2016/01/26 1 Yes NA
1984
NA Point Penalty System for Defects in Plumbing Works Carried Out by Licensed Plumbers Obsolete 2016/01/26 1 Yes NA
NA Approval of Water Supply Fittings (Supplementary No. 2) Obsolete 2016/01/26 4 Yes Yes
1983
NA Use of Polybutylene Pipes, Tubings and Fittings on Inside Service Obsolete 2016/01/26 2 Yes Yes
NA Provision of Water Supply and Fire Service Connections to New Developments Obsolete 2016/01/26 3 Yes Yes
NA Installation of Unvented Thermal Storage Type Water Heaters Obsolete 2016/01/26 2 Yes Yes
1982
NA Approval of Water Supply Fittings (Supplementary No. 1) Obsolete 2016/01/26 4 Yes Yes
NA Approval of Water Supply Fittings Obsolete 2016/01/26 4 Yes Yes
1981
NA Provision of Proper Protection to Galvanized Iron Pipes Encased in Concrete Obsolete 2016/01/26 2 Yes Yes
1979
NA Cold Water Inside Services : Use of Unplasticised Polyvinyl Chloride Pipes and Fittings Obsolete 2016/01/26 2 Yes Yes
1978
NA Cold Water Inside Services : Use of Unplasticised Polyvinyl Chloride Pipes and Fittings Obsolete 2016/01/26 2 Yes Yes
1975
NA Fire Service in Buildings Obsolete 2016/01/26 3 Yes Yes

Main

Note

Category Information
1 Administration
2 Hong Kong Waterworks Standard Requirements
3 Application of Water Supply
4 Approval of Pipes and Fitting