Code : 2022073
Event Name : Cost Savings of Re-plumbing Building Works Using Stainless Steel Pipes
CPD Code : Formal Events
Speaker : Dr Eric Cheng BAAS, BBldg, MSocSc, LLM, EdD, FHKIPD, FHKIS, FRICS
Qualified HKIS Surveyor since 1984; a Director of GHMSS Pipes Company Limited, an ex-Vice Chairman of the Hong Kong Institution of Plumbing and Drainage and a recent retired Senior Lecturer and assistant head from the City University of Hong Kong; a founder member of the Hong Kong Stainless Steel Piping and Fittings Merchants Association.

Mr Wong Tak Shing MHKIPD
Licensed Plumber from 1976 to present with over 52 years’ plumbing experience;
Director of GHMSS Pipes Company Limited, an ex-Technical Committee Member of the Hong Kong Institution of Plumbing and Drainage; a founder member of the Hong Kong Stainless Steel Piping and Fittings Merchants Association.
Event Date : 2022-06-24
Event Time : 7:00 pm – 8:30 pm
Registration Closing Date : 2022-06-22
CPD Hour(s) : 1.5
Divisional PQSL Hour(s) : 1.5
Venue : By online media – ZOOM
Division : QSD
Organizer : Quantity Surveying Division
Fee : HK$150 for members; HK$210 for non-members
Priority : HKIS members; first-come-first-served
Language : English supplemented by Cantonese
Details :

The Water Supplies Department (WSD) has given praises to stainless steel pipe materials for being of high pressure capability, good corrosion resistance, high strength and durability, and ease of jointing. Apart from these, this space age material is now cheaper which provides a golden opportunity to expand its usage in re-plumbing works in a revolutionary way.

The stainless steel pipe has excellent corrosion resistance by combining a number of chemical composition with inclusion of iron, chromium, nickel, carbon, manganese and silicon for grade 304, adding molybdenum for grade 316, and nitrogen element for grade duplex steel 1.  Stainless steel is suitably applied in the plumbing works, potable water, wastewater treatment, desalination and brine treatment. The University research study shows that stainless steel 316L has inhibitory effects on SARS-CoV-2 and H1N1 Virus. The stainless steel can be recycled with practicably no loss in strength. The use of stainless steel pipe can save water used to flushing copper pipes and fittings in newly constructed buildings. Referring to the WSD Circular No 5/2017, re-plumbing works of stainless steel pipe is recommended for use of refurbishment and replacement of aging pipe work.

The seminar will highlight on iron, stainless steels and pipe jointing methods, re-plumbing requirements including client’s expected quality; abatement of nuisance on residents during refurbishment. WSD has introduced Australia Standard AS3688 to make a joint connection guide to stainless steel pipe. It included screw BS6362, expanded collar, rolled–grooved and push or press-fit methods of AS3688 standard. The connection portion has a protruded point fitted with a rubber olive (croxed fitting). The water pipe connections can be designed with prefabricates in the manufacturer’s workshop and delivered to site for assembly and installation. This method can shorten the replacement and installation time, minimizing disturbance of interrupted water pipes. It is also cost saving with high quality installation. It is suitable for old buildings when replacing plumbing system with better work programme details, implementation of temporary water supply with no water supply suspension; and a neater disposing of dismantled materials.

Remarks :

The event will be conducted online via ZOOM. Upon successful payment of the registration fee, the ZOOM link for joining the CPD event will be available in the CPD/PQSL profile under the "Member Area" of the HKIS website.

On-line registration is not applicable for non-HKIS members. To register, please complete the CPD registration form ( and return with payment to the HKIS Secretariat.

Please install the Zoom Application in advance at

  • For Mobile phones, iPads & Android, install the ZOOM Cloud Meetings app from App Store or Play Store.
  • For PC and Mac, download and install the Zoom Client for Meetings.
Payment : HKD 150
Face-to-Face/Zoom : By Zoom