The standard for trusted indoor ventilation valves worldwide.
In 1983, the Dolgo ventilation valve made it possible for the first time in Japan to handle indoor drainage ventilation. Even after nearly 40 years since its release, there have been no reports of complaints due to product aging, and its durability has been proven. It has solved issues related to shortening construction periods and building design that were difficult with the outdoor air release method. We offer six models ranging from 40A to 125A.
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Drainage vent valve
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Morinaga Engineering Co., Ltd. Housing Equipment Sales Department A sales business for housing equipment that pursues a "comfortable and healthy living space." We prioritize the safety of the people who work there and those who live there above all else, proposing unique and high-quality equipment, systems, and solutions.