WIIK Public Company Limited, together with its subsidiaries, engages in the manufacture and distribution of plastic pipes and fittings for various applications in Thailand. It operates through two segments: Production Distribution and Pipe Installation Services, and Water Management. The Production Distribution and Pipe Installation Services segment offers high-density polyethylene (HDPE) solid wall pipes used in raw and portable water pipe, drainage and sewage pipe, electrical and phone cables conduit, submarine pipe, repair pipe, and mining applications; structured wall HDPE pipes used for drainage pipe, sewage pipe, intake & outfall pipe, culvert pipe, manhole, ventilation pipe, relining pipe, and combined sewage overflow; HDPE water tank used for water storage tank, rainwater collection tanks, wastewater treatment tank, septic tank, retaintion tank, chemical storage tank, bio-gas tank or scrubber tank, and pontoon and boat lift applications; and phone cable and cable conduit produced from HDPE resin. The segment also provides HDPE pipe welding and installation services; and consultancy, advisory, and servicing of HDPE pipe installation. The Water Management segment engages in the design, contract manufacture, concession, and distribution of integrated clean water production systems and wastewater treatment systems. It is also involved in the operation of tap water production business with ultra-filtration and reverse osmosis systems. The company was formerly known as Wiik & Hoeglund Public Company Limited and changed its name to WIIK Public Company Limited in December 2019. WIIK Public Company Limited was founded in 1983 and is headquartered in Bangkok, Thailand.