Chun Lee Engineering Co Ltd

Chi May Engineering Co.

Hang Chi Plumbing Engineering Limited

Po Shing Water & Electronic Limited

Chin Hung Engineering Company Limited

Chun Sing Water Maintenance Limited

Hung Fat Plumbing & Engineering Company

Lam Chi Kee Plumbing Drainage Eng., Co.

On Tai Waterworks Engineering Company Limited

Shun Hing Water Works Engineering (HK) Limited

Tin Wai Plumbing & Engineering Company Limited