Dehoust GmbH

Dehoust GmbH, headquartered in Leimen, Germany, with production and branch offices in Nienburg, Heidenau, and Eitorf, has operated since 1958—nearly 70 years—in storage technology and decentralized water management. The company originated in the heating oil tank market and has since expanded into a diversified manufacturer of plastic and steel storage tanks, rainwater harvesting systems, greywater recycling plants, and heating buffer vessels. Dehoust's Regenmanager® platform provides intelligent rainwater collection, storage, and distribution for buildings, while the GWtec® series represents the company's approach to decentralized greywater recycling, treating up to 30 m³ per day and recovering up to 40 percent of the thermal energy bound in greywater via integrated heat pump coupling. For potable water safety, Dehoust produces Category 5 drinking water separation stations compliant with EN 1717, preventing cross-contamination between mains and recycled water supplies. The Heidenau plant serves as the center of excellence for large-volume heating buffer tanks and cold storage tanks, manufacturing horizontal and vertical steel and stainless steel vessels up to 250 m³ for both above-ground and underground installation. The TrioSafe Plus and PE Kombi Plus lines offer double-wall and single-wall plastic tanks for heating oil, diesel, AdBlue, and process water storage, many carrying DIBt approval and compliance with DIN EN 13341. Since 1997, Dehoust has also offered offline fluorination of polyethylene surfaces, permanently reducing permeation of volatile compounds. The DehoustConnect app enables remote system monitoring and BMS data integration.