WIIK Public Company Limited, together with its subsidiaries, engages in the manufacturing and distribution of plastic pipes and fittings for various applications in Thailand and internationally. 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 for applications in raw and portable water pipes, drainage and sewage pipes, electrical and phone cables conduits, submarine pipes, repair pipes, and mining; structured wall HDPE pipes for use in drainage pipes, sewage pipes, intake and outfall pipes, culvert pipes, manholes, ventilation pipes, relining pipes, and combined sewage overflows; HDPE water tank for water storage tank, rainwater collection tanks, wastewater treatment tank, septic tank, retention 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 resins. 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 manufacturing, concession, and distribution of integrated clean water production systems and wastewater treatment systems. This segment is also involved in the operation of tap water production business with ultra-filtration and reverse osmosis systems; and trading of drinking water, mineral water, raw water, and tap water. 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.