ANSI pumps have been in process for nearly 6 decades and continue to be one of the most popular pump products in the market. The ANSI design was created in an effort to make replacement pumps easily accessible. All ANSI pumps are manufactured to be dimensionally interchangeable and back pull-out design. This allows facilities and plants the opportunity to source pumps from multiple manufacturers without changing their pipe schematic and design. The CURFLO® ANSI pumps are 100% interchangeable with the Durco® & Goulds®.