The Prime Air N14 is a premium shaft aerator with 1000 of hours of research behind it. It has a wet duty Marathon motor not just sealed. It has a 304 stainless steel shaft to resist corrosion that has been balanced to ensure long bearing life which increases the motor life. A redesigned aspirator that delivers air into the tank was designed so that it has less drag improving motor life, it also does not grab things and effortlessly that are floating in the system. This reduces wear and failure from simple things that happen in a wastewater environment. A suds restrictor plate makes sure foam from the bacteria doesn't build up in the system. The mounting brackets are designed to resist corrosion and have high wear stabilizers.