Tsunoda Tekkosho Co., Ltd.

Tsunoda Tekkosho Co., Ltd., also known as Sumida Iron Works Co., Ltd., is a Japanese manufacturer of valves for water supply and sewerage systems, headquartered with its main factory in Hikone, Shiga Prefecture, and sales offices in Osaka, Kyushu and Tohoku. Its products are delivered to national and local government agencies and private companies across Japan.

The product programme covers soft-seal and metal seat gate valves to JWWA B 120 and JWWA B 122, including earthquake-resistant pipe versions and PE socket types, waterworks butterfly valves to JWWA B 138, rapid air valves such as the Super Air series and the freeze-proof Airtech model, underground and above-ground fire hydrants to JWWA B 103, repair and isolating valves, flap valves, swing check valves, strainers, expansion joints, reducing valves and safety valves. The company operates under ISO 9001 certification with an integrated order, development, manufacturing and service system.