Maintenance-free, easily handle dirty water condition 25 percent more efficient than competition Powerful, dry-motor design delivers exceptional performance Precision-machined and balanced alloy steel rotor for superior performance Solid stiff-shaft design is constructed of high-strength alloy steel impervious to cracking caused by thermal stresses Xl-11 precision-crafted bearing system Advanced close coupled design increases pump life and efficiency, assures dependable seasonal start-ups and can easily handle difficult water condition Tough, durable seal system features a carbon/silicon carbide seal on a stainless steel shaft sleeve for long life and rugged operation Double sided stainless steel neck ring for optimum efficiency