Zoeller Pump Company, based in Louisville, Kentucky, is one of the leading manufacturers of submersible pumps for residential and commercial wastewater applications. Their M-series pumps are among the most widely installed septic pump chamber and effluent dosing pumps in North America. Septic service companies regularly service, test, and replace Zoeller pumps during pump chamber maintenance visits. Zoeller also manufactures sewage ejector pumps, sump pumps, and grinder pumps used in pressure sewer and mound system applications.