Hydro International

Hydro International is a water and wastewater treatment equipment manufacturer founded around 1980, headquartered in Clevedon, UK with significant operations in Portland, Maine, USA, and now part of the Tarmac Group. The company specializes in grit management, stormwater treatment, and flow control for municipal and industrial applications across more than 60 countries. Their wastewater product portfolio centers on the Advanced Grit Management approach, featuring the Grit King hydrodynamic grit separator, the HeadCell stacked-tray grit removal system, the Hydro GritCleanse fluidized-bed grit washing system, the SpiraSnail shafted screw dewatering device rated for up to 125 gpm with 95 percent capture of grit 106 micron and larger, and the compact non-mechanical Decanter grit dewatering bin. For stormwater treatment, Hydro International offers the Downstream Defender hydrodynamic vortex separator with Florida DEP approval for nutrient removal, the First Defense high-capacity separator certified by NJDEP at the industry's highest loading rate for 50 percent TSS removal, and the Up-Flo Filter achieving 80 percent TSS removal with NJDEP, NJCAT, TAPE GULD, and ISO 14034 certifications. Flow control products include the Hydro-Brake Optimum vortex flow control with adjustable inlet and the Stormbloc Optimum geocellular attenuation system. The company also provides the Hydro MicroScreen rotating belt screen, DynaSand continuous sand filters, and monitoring systems under the Hydro-Logic brand including the Flexi Logger 105 telemetry unit and Aquator XV water resources modeling software.