From our supplier’s page:
Zoeller® Company was founded in 1939 as a family-owned operation making various products, one of which was a dependable column sump pump.
From its humble beginnings, Zoeller® Company, one of the oldest, independently-owned U.S. pump manufacturers, has maintained the highest of quality standards, setting the benchmark for all other manufacturers of pumps. All Zoeller® pumps are time-tested and quality-driven. Our submersible pumps are 100% factory-tested underwater for dependability from the instant they’re plugged in.
Zoeller® products are sold throughout the United States, Canada and Mexico as well as around the world. With five distinct wholesale product lines, Zoeller® has the answer to all your pumping needs.