H Hydrex™ Cooling System Chemicals For the treatment of cooling systems, Hydrex™ offers the 2000 series. Sludge treatment Hydrotech Discfilter Discfilter offers a large filtering area in a small footprint for municipal effluent polishing and industrial water reuse. Filtration Hydrotech Drumfilter Patented mechanical self-cleaning drumfilter for municipal and industrial recovery water applications. Filtration
