Pioneering filter technology since 1959 Zabel Environmental Technology® is the most recognized and trusted name in onsite wastewater filtration. The Zabel filter line has evolved from a single disc dam filter into a complete line of over 80 Effluent Filters to fit every wastewater application. With over one million filters installed throughout the US and abroad, Zabel is the source for all your wastewater filtering needs. We are the number one choice of Engineers and Specifiers. Whatever the ap