With more than 55 years of experience and more than one million end users we serve daily, we are a sewer solution to your most challenging projects! A pressure sewer system uses small-diameter pipes and grinder pumps, which are often installed at each home. The grinder pump station collects all of the wastewater from the home and grinds it into slurry. The wastewater is then pumped to a larger sewer main or directly to a wastewater treatment plant. E/One developed the concept of the household grinder pump starting in 1968. Today, celebrating four decades of leadership, the E/One Extreme series grinder pump is more reliable and rugged than ever before.