U.S. SEAL MFG. makes replacement mechanical seals for industrial pumps as well as pool and spa equipment, with products covering 95% of the replacement seal market according to the company. Its seals are designed for long service life and automatic self-adjustment, while its technical and sales staff bring more than 75 years of combined mechanical-seal experience. Based in Morton Grove, Illinois, the company also helps customers identify the right seal for specific equipment and applications.