| LEONG KEE PLUMBING ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| YAU LEUNG PLUMBING ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LEUNG SIU KEE PLUMBING ENGINEERING LIMITED | Private company limited by shares | Live |
| Manpower Plumbing Engineering Limited | Private company limited by shares | Live |
| MARK PLUMBING ENGINEERING CO LIMITED | | Live |
| MING KEE PLUMBING ENGINEERING LIMITED | Private company limited by shares | Live |
| MING YAT PLUMBING ENGINEERING LIMITED | Private company limited by shares | Live |
| GO MING PLUMBING & ENGINEERING COMPANY LIMITED | | Live |
| MODERN ELECTRIC & PLUMBING ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| NewSky Plumbing & Electrical Engineering Company Limited | Private company limited by shares | Live |
| ONPLUS PLUMBING ENGINEERING LIMITED | Private company limited by shares | Live |
| POLARIS PLUMBING AND ELECTRICAL ENGINEERING COMPANY LIMITED | | Live |
| Strong Power Plumbing Engineering Company Limited | Private company limited by shares | Live |
| Wang Tong Plumbing Engineering Company Limited | Private company limited by shares | Live |
| WING TAT PLUMBING ENGINEERING LIMITED | Private company limited by shares | Live |
| PO WING PLUMBING ENGINEERING LIMITED | Private company limited by shares | Live |
| Wing Lee Plumbing Engineering Limited | | Live |
| WINNER PLUMBING ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| Sun Yeung Plumbing Engineering Co., Limited | Private company limited by shares | Live |
| YUEN FAT PLUMBING ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| FU KEE METALS & PLUMBING ENGINEERINGS LIMITED | Private company limited by shares | Live |
| J&C PLUMBING ENTERPRISES LIMITED | Private company limited by shares | Live |
| FENGHUA SHANHE PLUMBING EQUIPMENT CO., LIMITED | Private company limited by shares | Live |
| Famrich Plumbing Engineering Limited | Private company limited by shares | Live |
| FAR EAST PLUMBING AND FIRE SERVICES ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Sun Grand Electrical Plumbing & Fire Engineering Limited | Private company limited by shares | Live |
| NINGBO PLUMBING AND HEATING FITTINGS LIMITED | Private company limited by shares | Live |
| SHANGHAI FLYING PLUMBING EQUIPMENT LIMITED | Private company limited by shares | Dissolved |
| Cheuk Fung Plumbing Engineering Company Limited | Private company limited by shares | Live |
| Ka Fung Plumbing Electrical & Air-Conditioning Engineering Limited | Private company limited by shares | Live |
| MING FUNG PLUMBING AND ELECTRICAL COMPANY LIMITED | Private company limited by shares | Live |
| Kam Fung Plumbing & Drainage Engineering Company Limited | Private company limited by shares | Live |
| Lok Fung Plumbing & Drainage Engineering Company Limited | Private company limited by shares | Live |
| MING FUNG PLUMBING ENGINEERING LIMITED | Private company limited by shares | Live |
| KIN FUNG PLUMBING WORK LIMITED | Private company limited by shares | Dissolved |
| Kin Fung Plumbing and Drainage Works Limited | Private company limited by shares | Live |
| Fung Ying Plumbing Engineering Company Limited | Private company limited by shares | Live |
| Fuya Plumbing & Electrical Engineering Co., Limited | | Live |
| GOLDEN SPRING PLUMBING FAUCET CO. LIMITED | Private company limited by shares | Dissolved |
| Great Power Plumbing Engineering Limited | Private company limited by shares | Live |
| HANSON AIR CONDITIONING PLUMBING & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| EXCELLENCE PLUMBING HARDWARE LIMITED | Private company limited by shares | Dissolved |
| HARVEST METALS & PLUMBING LIMITED | Private company limited by shares | Live |
| HOP HING PLUMBING COMPANY LIMITED | Private company limited by shares | Dissolved |
| YEE HING PLUMBING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Tai Hing Plumbing Limited | Private company limited by shares | Live |
| Wing Hing Plumbing Limited | Private company limited by shares | Live |
| Amazing Plumbing Engineering (HK) Co., Limited | | Live |
| JIUMU PLUMBING (HK) LIMITED | Private company limited by shares | Live |
| DONGHAI METER & PLUMBING (H.K.) CO. LIMITED | Private company limited by shares | Live |
| YEE HONG KEE (PLUMBING) COMPANY, LIMITED | Private company limited by shares | Live |
| HONG KONG FEDERATION OF PLUMBING AND DRAINAGE LIMITED | Company limited by guarantee | Dissolved |
| HONG KONG INSTITUTION OF PLUMBING AND DRAINAGE LIMITED -THE- | Company limited by guarantee | Live |
| HONG KONG PLUMBING & DRAINAGE WORKS LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Plumbing and Drainage Works Limited | Private company limited by shares | Live |
| Hong Kin Plumbing Engineering And Renovation Limited | | Live |
| EURO PLUMBING HONG KONG LIMITED | Private company limited by shares | Dissolved |
| Promise Plumbing Hong Kong Company Limited | Private company limited by shares | Live |
| HONG KONG PLUMBING PROMOTION LIMITED | Private company limited by shares | Live |
| HOTI (HONGKONG) PLUMBING LIMITED | Private company limited by shares | Live |
| HUASHENG PLUMBING (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HUICHENG PLUMBING EQUIPMENT (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| KINGSHARK PLUMBING IMPORT & EXPORT LIMITED | Private company limited by shares | Live |
| DOLPHIN PLUMBING INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| SANLI PLUMBING INDUSTRY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SANLI PLUMBING INDUSTRY COMPANY LIMITED | Private company limited by shares | Live |
| KAMMON PLUMBING & DRAINAGE ENG. LIMITED | Private company limited by shares | Live |
| SHANGHAI KEJIE PLUMBING EQUIPMENT LIMITED | Private company limited by shares | Dissolved |
| Ho King Plumbing Engineering Limited | | Live |
| KING SHARK PLUMBING MANUFACTURING LIMITED | Private company limited by shares | Live |
| KITSON PLUMBING COMPANY LIMITED | Private company limited by shares | Live |
| LEE KUEN KEE PLUMBING WORKS COMPANY LIMITED | Private company limited by shares | Dissolved |
| KWAN ON PLUMBING COMPANY LIMITED | Private company limited by shares | Dissolved |
| KWONG CHEONG PLUMBING EQUIPMENT TRADING LIMITED | Private company limited by shares | Live |
| KWONG FAI PLUMBING AND DRAINAGE LIMITED | Private company limited by shares | Live |
| YAU KWONG YEE KEE ELECTRICAL & PLUMBING CONTRACTORS LIMITED | Private company limited by shares | Live |
| Kwong Shek Plumbing & Electrical Engineering Limited | | Live |
| WAH KWONG PLUMBING ENGINEERS COMPANY LIMITED | Private company limited by shares | Live |
| Kwong Kee Plumbing and Sanitary Ware Company Limited | Private company limited by shares | Live |
| LEO'S PLUMBING MANUFACTURING CO., LIMITED | Private company limited by shares | Live |
| CHINA LINK PLUMBING ENGINEERING LIMITED | Private company limited by shares | Live |
| Lung Kee Plumbing Limited | Private company limited by shares | Live |
| HANG LUNG PLUMBING ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| NINGBO PLUMBING AND HEATING FITTINGS MANUFACTURE LIMITED | Private company limited by shares | Live |
| Mario Plumbing Engineering Limited | Private company limited by shares | Live |
| KIN YIP PLUMBING MATERIALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SharkBite Plumbing Materials Enterprise., Limited | Private company limited by shares | Live |
| MAVIS PLUMBING PRODUCTS FITTING CO., LIMITED | Private company limited by shares | Live |
| HEBEI EURASIAN METAL PLUMBING INDUSTRIES LIMITED | Private company limited by shares | Live |
| MIAOYI PLUMBING COMPANY LIMITED | Private company limited by shares | Live |
| MingLeung Plumbing Limited | Private company limited by shares | Live |
| MINGOOD PLUMBING COMPANY LIMITED | Private company limited by shares | Dissolved |
| NINGBO SUNRISE PLUMBING & HEATING LIMITED | Private company limited by shares | Live |
| N.S. ELECTRICAL PLUMBING WORKS CO. LIMITED | Private company limited by shares | Live |
| Yin Wan Octopus Plumbing Limited | | Live |
| PARTNER PLUMBING LIMITED | Private company limited by shares | Live |
| HANG WAI PLUMBING AND PIPEFITTING LIMITED | Private company limited by shares | Live |
| POLTA PLUMBING & ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| WAI PONG PLUMBING LIMITED | Private company limited by shares | Live |
| A-S CHINA PLUMBING PRODUCTS SERVCO LIMITED | Private company limited by shares | Dissolved |