Blue-White Industries A1A4-7T FLEXFLO® 115V .01-100GPD 40PSI FLEXFLO® Pump with Nema Plug is specially designed for commercial aquatics, the A1A enables users who require higher chemical feed requirements for sanitizing (sodium hypochlorite) and pH adjustment (acid) to move away from diaphragm technology and the inherent challenges experienced with these chemicals and adapt to peristaltic technology for less service, more trouble free and reliable chem feed solution.