Wilo is the leading circulator pump manufacturer in Europe today. The company was founded in 1872 by Louis Opländer as a copper and brass goods factory and is now represented in more than 70 countries around the world. Wilo employs about 6,000 personnel and has become a leader in the US market for 3-speed and variable speed pumps. The Star 21F 3-speed pump is reliable, affordable, and increasingly popular across the country. Try out the Wilo S21 3-speed pump from SupplyHouse.com.