The Institute of Plumbing & Heating Engineering – HK Council

H.K. & KLN. Electric Trade Association

Hong Kong Electrical Appliances Manufacturers Association Ltd.

Association of Electrical Contractors

Hong Kong Plumbing and Sanitary Ware Trade Association Ltd.

H.K. & Kowloon Electrical Engineering & Appliances Trade Workers Union

Hong Kong Plumbing General Union

The Hong Kong Federation of Electrical and Mechanical Contractors Limited