http://www.MissouriBasement.com A reliable basement sump pump system should have 2 float switches considering that 90% of sump pump failure is due to float switch failure. Our GrateSump paired with the Pro Series sump pumps come standard with dual float switches for extra reliability. Missouri Basement serves all of St. Louis and St. Charles, MO. If your experiencing a sump pump or wet basement problem, call us today at 1-800-694-3705