King Wan 

King Wan Corporation Limited, an investment holding company, provides mechanical and electrical engineering services for the building and construction industry in Singapore. It operates through Plumbing and Sanitary, Electrical & ACMV, Toilet Rental, and Other segments. The company designs and installs water distribution systems and pipe network for sewage and waste water drainage; rents and operates mobile lavatories and other facilities; and invests in equity securities and trading in eco-friendly products. It also engages in designing and installation of electricity distribution systems, fire protection, alarm systems, communications, and security systems, as well as air-conditioning and mechanical ventilation systems. The company was formerly known as King Wan Corporation Pte Ltd and changed its name to King Wan Corporation Limited in November 2000. King Wan Corporation Limited was founded in 1977 and is based in Singapore.