McNish Corporation includes four divisions that provide products and services globally for the water and wastewater industry. ... Three of the divisions; Amwell, E & I Corporation, and Walker Process Equipment provide custom engineered products. RBC Services provides specialized services for RBC (Rotating Biological Contactor) installations. Now for the first time, McNish Corporation is offering a selection of clarifier drive assemblies for circular clarifier and thickener mechanisms directly from the McNish manufacturing facility. read more