Trusty Warns - Offers stainless steel battery backup sump pumps, emergency systems and service. - http://www.trustywarns.com/
CyberVertex Sump Systems - Specializing in battery backup sump pump equipment. - http://www.cybervertex.com/sump.html
Zoeller Company - Manufacturer of dirty water submersible sump pumps for dewatering, sewage and grinder applications, pump sizing software, and plastic injection molding. - http://www.zoeller.com/